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Journal articles on the topic 'Diadegma semiclausum'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

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1

KUMARAWATI, NI PUTU NIA, I. WAYAN SUPARTHA, and KETUT AYU YULIADHI. "Parameter Biologi dan Demografi Parasitoid Diadegma semiclausum Hellen (Hymenoptera : Ichneumonidae) pada Plutella xylostella L. (Lepidoptera : Plutellidae)." Agrotrop : Journal on Agriculture Science 8, no. 2 (2019): 156. http://dx.doi.org/10.24843/ajoas.2018.v08.i02.p06.

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Biological and Demographic Parameters of Parasitoid Diadegma semiclausum Hellen (Hymenoptera: Ichneumonidae) on Plutella xylostella L. (Lepidoptera: Plutellidae). Diadegma semiclausum Hellen (Hymenoptera: Ichneumonidae) is one of the parasitoid larvae which attacks Plutella xylostella (Lepidoptera: Plutellidae) effectively. This research was aimed to know the biology of parasitoid D. semiclausum in broccoli. The research was carried out in a laboratory by observing the development of parasitoid, fecundity, longevity the males and females as well as parameters demographic of D. semiclausum. The results showed that immature development time of D. semiclausum parasitoid from egg up to adult the imago was 10.65 ± 0.63 days, with the number of fecundity was 22.9 grains. Longevity of male imago of D. semiclausum was 12.10 ± 0.74 days and imago of females 9.80 ± 1.87 days. Parameters demographic of D. semiclausum showed that net reproduction rate (R0) was 22.11 per generation, intrinsic growth rate (r) was 0.18 per day, limited increased rate (?) was 1.16 individuals per day, generation time (T) was 17.50 day.

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2

Khatri, D., X. Z. He, and Q. Wang. "Mating behaviour and egg maturation in Diadegma semiclausum Hellen (Hymenoptera Ichneumonidae)." New Zealand Plant Protection 62 (August 1, 2009): 174–78. http://dx.doi.org/10.30843/nzpp.2009.62.4774.

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Diadegma semiclausum is an important larval parasitoid of diamondback moth Plutella xylostella Little was known about the reproductive biology of this parasitoid The present study investigated mating behaviour and egg maturation dynamics of D semiclausum in the laboratory at 211C 168 h (lightdark) and 5060 RH Both males and females became sexually mature

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3

Hasibuan, Rosma, Nilly Christalia, F. X. Susilo, and Nur Yasin. "POTENTIAL IMPACT OF METARHIZIUM ANISOPLIAE ON THE DIAMONDBACK MOTH (LEPIDOPTERA: PLUTELLIDAE) AND ITS PARASITOID DIADEGMA SEMICLAUSUM (HYMENOPTERA: ICHNEUMONIDAE)." Jurnal Hama dan Penyakit Tumbuhan Tropika 9, no. 2 (2009): 99–108. http://dx.doi.org/10.23960/j.hptt.2999-108.

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Potential Impact of Metarhizium anisopliae on the Diamondback Moth (Lepidoptera: Plutellidae) and Its Parasitoid Diadegma semiclausum (Hymenoptera: Ichneumonidae). Laboratory studies were conducted to evaluate the effect of the Metarhizium anisopliae against the diamondback moth, Plutella xylostella and its parasitoid, Diadegma semiclausum. A completely randomized design consisted of 5 treatments (4 concentrations of conidial suspension: 5 x 104, 3.5 x 105, 2.5 x 106, 1.2 x 107 conidia/ml and control) was used. The results indicated that the mortality of P. xylostella larvae were significantly induced by the fungal treatments. A significant reduction in pupation and adult emergence of P. xylostella was also detected in all treatments when compared with that in the control. The fungus might also result in a male-biased sex ratio of the surviving P. xylostella. When applied at a concentration of 1.2 x 107 conidia/ml, M. anisopliae might significantly reduce the survival of the parasitoid, D. semiclausum. Thus, despite its potential as a biological control agent against P. xylostella, the entomomogenous fungus M. anisopliae was also detrimental to the larvae parasitoid D. semiclausum.

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Puu, Yustina Maria Silvia Wonga. "EKSPLORASI DAN IDENTIFIKASI PARASITOID HAMA Plutella xylostella PADA TANAMAN KUBIS Brassica oleracea." AGRICA 7, no. 2 (2020): 111–21. http://dx.doi.org/10.37478/agr.v7i2.409.

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This study aims at exploring and identifying parasitoid Plutella xylostella pest on cabbage plants Brassica oleracea in Nduaria Village and finding out the most dominant parasitoid associated with Plutella xylostella pest. Observation variables used included identification of parasitoid species being parasitic in each stage of Plutella xylostella pest life found in the field, parasitoid species abundance and domination of parasitoid. The result of exploration in three sub-villages of NduariaVillage indicated that there were three species of the parasitoid, namely eggof parasitoid Trichogrammatoidae cojuangcoi, the larva of parasitoid Diadegma semiclausum and Cotesia Plutellae. The dominant parasitoid is Diadegma semiclausumwith the value of 0,11. The most abundance in parasitoid larva Diadegma semiclausum is 5,7%. Damage intensity caused by Plutella xylostella was categorized as medium damage intensity of>25-?50%, and this kept rising along with the age of larva and population as well as supporting environment condition due to Plutella xylostella resistance to the pesticide.

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5

Maulina, Fri. "KAIROMON SEBAGAI PEMANDU KEDATANGAN PARASITOID DIADEGMA SEMICLAUSUM HELLEN PADA LARVA INANG." Journal of Food Crop and Applied Agriculture 1, no. 2 (2021): 63–67. http://dx.doi.org/10.32530/jfcaa.v1i2.389.

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Kairomon merupakan suatu zat kimia yang dikeluarkan oleh suatu spesies untuk menarik spesies yang berbeda seperti larva hama terhadap parasitoid. Sumber potensial kairomon bisa diperoleh dari kotoran, kelenjar ludah, sutera, kontaminasi tubuh, sekresi makan, dan sekresi pertahanan dari inang. Tujuan penelitian ini adalah untuk mengetahui keberadaan kairomon pada kotoran larva inang (larva P. xylostella) dan pengenceran terbaik dalam mengundang kedatangan parasitoid D. semiclausum. Pengujian kairomon menggunakan Rancangan Acak Lengkap (RAL), terdiri dari 4 perlakuan dan 7 ulangan. Perlakuan yaitu pengenceran kotoran inang pada 10-1, 10-2, (tanpa pengenceran = 100) dan kontrol. Hasil pengujian membuktikan bahwa kotoran larva Plutella xylostella dapat memandu kedatangan parasitoid D. semiclausum dengan indikator jumlah telur yang diletakkan pada pengenceran kotoran larva 10-1 dan 10-2 dan tingkat parasitisasi pada pengenceran kotoran larva 10-1 dan 10-0. Kotoran larva P. xylostella berperan sebagai kairomon bagi parasitoid D. semiclausum. 

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6

Azidah, A. A., M. G. Fitton, and D. L. J. Quicke. "Identification of the Diadegma species (Hymenoptera: Ichneumonidae, Campopleginae) attacking the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)." Bulletin of Entomological Research 90, no. 5 (2000): 375–89. http://dx.doi.org/10.1017/s0007485300000511.

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AbstractThe species of Diadegma that attack Plutella xylostella(Linnaeus) are revised. Following a morphometric study involving principal components and discriminant analyses, seven distinct morphospecies are recognized. One species is described as new: D. novaezealandiae from New Zealand. Diadegma mollipla(Holmgren) is the name for the species from sub-Saharan Africa and some Indian Ocean and South Atlantic islands. Diadegma varuna Gupta syn. nov. and D. niponicaKusigemati syn. nov. are both synonymized with D. fenestrale(Holmgren). Diadegma xylostellae Kusigemati is strongly presumed to be a synonym of D. semiclausum (Hellén). An illustrated identification key is provided and each species is described in a standard way.

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7

Khatri, D., X. Z. He, and Q. Wang. "Reproductive fitness of Diadegma semiclausum Hellen (Hymenoptera Ichneumonidae) in response to host density." New Zealand Plant Protection 65 (January 8, 2012): 142–47. http://dx.doi.org/10.30843/nzpp.2012.65.5384.

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Diadegma semiclausum is an important larval parasitoid of diamondback moth (DBM) Plutella xylostella The present study investigated the reproductive fitness of D semiclausum females in response to host densities of 5 and 30 DBM larvae per cabbage seedling per day Both the number of hosts parasitised and the number of female progeny produced over the life of the parasitoid were significantly greater in the 30 than the 5 host density (hosts parasitised 60131 versus 12015 and female progeny produced 6710 versus 122) (P

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Istiaji, Bonjok, Djoko Prijono, and Damayanti Buchori. "Keberhasilan hidup parasitoid Diadegma semiclausum Hellen dan serangga inangnya Plutella xylostella (L.) terhadap aplikasi ekstrak biji srikaya (Annona squamosa L.)." Jurnal Entomologi Indonesia 15, no. 1 (2018): 10. http://dx.doi.org/10.5994/jei.15.1.10.

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Pengendalian Plutella xylostella L. dapat dilakukan baik secara hayati maupun kimiawi. Pengendalian secara hayati umumnya banyak dilakukan dengan cara memanfaatkan ekstrak tanaman untuk membunuh serangga hama. Penelitian ini bertujuan mengetahui pengaruh ekstrak biji srikaya terhadap kematian dan perkembangan parasitoid Diadegma semiclausum Hellen serta inangnya, P. xylostella. Pengaruh ekstrak biji srikaya terhadap larva P. xylostella instar III awal diuji dengan metode residu pada daun dan metode residu pada permukaan gelas untuk menguji pengaruh kontak ekstrak biji srikaya terhadap kematian imago D. semiclausum. Pengaruh ekstrak biji srikaya terhadap parasitisasi dan perkembangan D. semiclausum pradewasa dilakukan dengan memaparkan larva P. xylostella yang telah terkontaminasi ekstrak biji srikaya pada konsentrasi subletal (LC5 dan LC10) pada imago D. semiclausum. Hasil penelitian menunjukkan ekstrak biji srikaya pada konsentrasi 0,0632–0,1% pada kontaminasi 24 jam berpengaruh terhadap kematian larva P. xylostella dan imago parasitoid D. semiclausum. Imago parasitoid lebih peka terhadap peningkatan konsentrasi ekstrak biji srikaya dibandingkan dengan larva P. xylostella. Hambatan perkembangan P. xylostella oleh ekstrak biji srikaya pada konsentrasi yang digunakan umumnya tidak nyata. Demikian pula, hambatannya terhadap perkembangan parasitoid D. semiclausum dalam inang yang terkontaminasi konsentrasi subletal (LC5 dan LC10) ekstrak biji srikaya umumnya tidak berbeda nyata. Keberadaan ekstrak biji srikaya dalam inang juga tidak berpengaruh nyata terhadap tingkat parasitisasi, panjang kokon, lebar kokon, dan bobot kokon. Oleh karena itu, terdapat peluang memadukan pengendalian P. xylostella secara kimiawi dan hayati.

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9

Khatri, D., Q. Wang, and X. Z. He. "Development and reproduction of Diadegma semiclausum (Hymenoptera Ichneumonidae) on diamondback moth Plutella xylostella (Lepidotera Plutellidae)." New Zealand Plant Protection 61 (August 1, 2008): 322–27. http://dx.doi.org/10.30843/nzpp.2008.61.6810.

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This study investigated the development emergence and mating of Diadegma semiclausum Hellen an important parasitoid of diamondback moth in the laboratory at 21 1C and 5060 RH with a photoperiod of 1212 h (lightdark) The parasitoids developmental period was significantly shorter and pupal weight significantly higher if their mothers parasitised the fourth instar larvae of DBM (P

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10

Rossbach, A., B. Löhr, and S. Vidal. "Interspecific competition between Diadegma semiclausum Hellen and Diadegma mollipla (Holmgren), parasitoids of the diamondback moth, Plutella xylostella (L), feeding on a new host plant." Bulletin of Entomological Research 98, no. 2 (2007): 135–43. http://dx.doi.org/10.1017/s0007485307005482.

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AbstractInterspecific competition between an introduced parasitoid species aimed at controlling a herbivorous pest species and a native parasitoid parasitising the same host may influence the success of classical biological control programmes. In Kenya, interspecific competition between an introduced and a local parasitoid on two diamondback moth populations (DBM, Plutella xylostella) was investigated on two different host plants. We tested simultaneous and delayed competition of the local parasitoid Diadegma mollipla Holmgren and its exotic congenus D. semiclausum Hellen on a newly aquired DBM host plant (snowpea) in the laboratory. Under simultaneous competition, D. mollipla produced more progeny than D. semiclausum on snowpea. A head start of D. Mollipla, of four and eight hours before its congenus was introduced, resulted in a similar number of progeny of both species. In delayed competition (time intervals of 24 h, 48 h and 72 h), progeny production was similar for both parasitoids when the time interval was 24 h, irrespective of which species parasitized first. More progeny was produced by the species which attacked first, when the time interval was greater than 24 h, although it was only significant at 72 h. Competitive abilites of both parasitoids on the new host plant differed largely between laboratory and semi-field conditions. The influence of two host plants (snowpea and cabbage) on competition was studied in the greenhouse with different host and parasitoid densities. Parasitism levels of D. semiclausum were significantly higher than those of D. mollipla, regardless of host plant, host and parasitoid densities, but progeny production of D. mollipla on snowpea was still slightly higher than on cabbage. As compared to the confinement of parasitoids and larvae to small containers, D. mollipla parasitized very few larvae in the cages. Competitive ability of the two parasitoid species tested was influenced both by the density of the searching females and by parameters related to either the host plant and/or the herbivorous hosts.

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11

Winkler, Karin, Felix Wäckers, Gabriella Bukovinszkine-Kiss, and Joop van Lenteren. "Sugar resources are vital for Diadegma semiclausum fecundity under field conditions." Basic and Applied Ecology 7, no. 2 (2006): 133–40. http://dx.doi.org/10.1016/j.baae.2005.06.001.

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12

Suripto, Suripto, Tresnani, G., and Gunawan, E. R. "Mode of Action Anti Serangga dari Tananam Jayanti (Sesbania sesban L. Merr.)(MAGNOLIOPSIDA: FABACEAE)." Jurnal Biologi Tropis 20, no. 2 (2020): 194. http://dx.doi.org/10.29303/jbt.v20i2.1875.

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Abstrak: Dari hasil penelitian-penelitian sebelumnya telah diketahui, bahwa tanaman Jayanti (Sesbania. Sesban) memiliki aktivitas anti serangga terhadap Plutella xylostella, salah satu jenis serangga hama penting tanaman kubis. Juga telah diketahui, bahwa bahan aktif anti serangga dari S. sesban dengan konsentrasi tertentu dapat mematikan imago Diadegma semiclausum, yang merupakan musuh alami dari P. xylostella. Namun demikian, mode-mode aksi aplikasi bahan insektisida dari S. sesban yang selektif untuk pengendalian serangga hama, yaitu dapat menekan populasi P. xylostella namun aman terhadap populasi D. semiclausum belum diketahui. Penelitian ini bertujuan untuk mengetahui mode-mode aksi aplikasi berbagai fraaksi ekstrak daun S. sesban yang selektif untuk pengendalian P. xylostella. Serbuk kering daun S. sesban diekstraksi secara bertingkat menggunakan seri pelarut, yaitu berturut-turut petroleum eter, diklorometana, etanol dan air. Masing-masing fraksi ekstrak daun S. sesban dilakukan bioassay terhadap P. Xylostella secara parallel, yaitu uji mortalitas larva, uji daya tolak ovipositor, uji penghambatan penetasan telur dan uji anti feedant. Data hasil setiap uji hayati diolah dengan analisis probit untuk menentukan LC50 (mortalitas larva) dan EC50 (daya tolak ovipositor, penghambatan tetas telur dan daya anti feedant). Hasil menunjukkan, bahwa fraksi ekstrak-etanol daun S. sesban memiliki daya anti serangga terhadap P. xylostella lebih tinggi daripada fraksi-fraksi ekstrak lainnya. Hasil juga menunjukkan, bahwa aplikasi fraksi ekstrak-etanol daun S. sesban melalui mode-mode aksi anti ovipositor dan anti feedant adalah selektif untuk pengendalian P. xylostella. Harga EC50 daya tolak ovipositor (20.52 ppm) dan EC50 anti feedant (26.77 ppm) terhadap P. xylostella masing-masing lebih kecil daripada harga LC50 (37.38 ppm) terhadap D. semiclausum. Disarankan, bahwa penggunaan ekstrak daun S. sesban untuk pengendalian P. xylostella hendaknya diarahkan untuk aplikasi menolak oviposisi dan menghambat aktivitas makan dan tidak disarakan untuk aplikasi mematikan larva dan menghambat penetasan telur P. xylostella. Juga disarankan, bahwa selektivitas ekologis dan efektivitas pengendalian P. xylostella dengan insektisida dari S. sesban perlu dievaluasi dengan mempelajari lebih lanjut stabilitas anti serangga dari S. sesban selama penyimpanan serbuk kering daun sebelum diekstraksi, penyimpanan ekstrak sebelum diaplikasikan, dan stabilitasnya selama aplikasi.Kata kunci: Diadgma semiclausum, mode aksi anti serangga, Plutella xylostella, Sesbania sesban.Abstract: From the results of previous studies have been known that Jayanti (Sesbania sesban) plants have anti-insect activity against Plutella xylostella, one of the important species of insect pests of cabbage. It is also well known, that the anti-insect active ingredient from S. sesban with a certain concentration can kill Diadegma semiclausum imago, which is a natural enemy of P. xylostella. However, selective modes of action for the application of insecticides from S. sesban for pest control, which suppress P. xylostella populations but are safe against D. semiclausum are not yet known. The S. sesban leaf dry powder was extracted stratified using a series of solvents, namely petroleum ether, dichloromethane, ethanol and water, respectively. Each fraction of S. sesban leaf extract was bioassayed on P. xylostella in parallel, namely larval mortality, ovipositor resistance, egg hatching inhibition and anti-feedant tests. Data on the results of each bioassay was analyzed by probit analysis to determine LC50 (larval mortality) and EC50 (ovipositor resistance, egg hatching inhibition and anti-feedant power. The results show that the extract fraction-ethanol of S. sesban leaves has higher insect repellent ability against P. xylostella than other extract fractions. The results also showed that the application of S. sesban leaf extract fraction-ethanol through each mode of action of anti-ovipositor and anti-feedant was selective for the control of P. xylostella. Each of the reject ovipositor EC50 (20.52 ppm) and anti-feedant EC50 (26.77 ppm) values against P. xylostella was smaller than the LC50 price (37.38 ppm) against D. semiclausum imago. It is recommended that the use of S. sesban leaf extract for controlling P. xylostella should be directed with application to reject oviposition and inhibit eating activities. This is because the concentration of the extract application is safe against D. semiclausum. Application of S. sesban leaf extract is not recommended to kill larvae and inhibit hatching eggs of P. xylostella because it requires a greater concentration of extract application and can suppress the population of D. semiclausum. Ecological anti-insect selectivity and effectiveness of using insecticide from S. sesban for the control of P. xylostella need to be evaluated by further studying the stability of the anti-insect active ingredient from S. sesban during storage of dried leaf powder before extracting, storage of extracts before being applied, and their stability during application.Keywords: Diadegma semiclausum, insecticidal mode of action, Plutella xylostella, Sesbania sesban.

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13

Löhr, B., R. Gathu, C. Kariuki, J. Obiero, and G. Gichini. "Impact of an exotic parasitoid on Plutella xylostella (Lepidoptera: Plutellidae) population dynamics, damage and indigenous natural enemies in Kenya." Bulletin of Entomological Research 97, no. 4 (2007): 337–50. http://dx.doi.org/10.1017/s0007485307005068.

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AbstractDiadegma semiclausum (Hellén) (Hymenoptera: lchneumonidae), an exotic diamondback moth parasitoid, was released in two pilot areas (Werugha in Coast Region and Tharuni in Central Province) in Kenya. Fifteen month before release, observations on the diamondback moth, Plutella xylostella (Linnaeus), and local natural enemy population dynamics and pest damage were initiated in both areas and continued for three years after release. The P. xylostella population was bimodal with higher records during dry seasons. At Werugha, the peak population of P. xylostella was 16.8 per plant (October 2001); at Tharuni it was 12.8 (February 2002). Populations at Werugha declined from three months after release and decreased from 5.4 per plant (before release) to 0.8 (year 3 after release). Concurrently, average damage (1.9 to 1.5) (on a 0–5 scale), proportion of attacked plants (72 to 31%) and proportion of plants in damage group >2 (plants with head damage) decreased (21.4 to 5.3%), while total parasitism increased from 14.4 (before) to 52.5% (year 3 after release, 90% due to D. semiclausum). At Tharuni, D. semiclausum was only recovered 3 months after release. Average populations of P. xylostella declined from 5.9 per plant (before release) to 2.4 (year 3 after release) and damage scores from 2.3 to 1.7. The proportion of plants in damage group >2 declined from 39.7 to 4.5% while overall parasitism increased from 4.2 to 40.6% (98.3% by D. semiclausum). Four species of indigenous parasitoids (Diadegma mollipla (Holmgren), Oomyzus sokolowskii (Kurdjumov), Apanteles sp. and Itoplectis sp., all primary parasitoids) were almost completely displaced by D. semiclausum. Possible reasons for the different parasitoid development between the two release areas and the displacement of the indigenous species are discussed.

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Kahuthia-Gathu, Ruth, and Stephen T. O. Othim. "Effects of Two Cultivated Brassica spp. on the Development and Performance of Diadegma semiclausum (Hymenoptera: Ichneumonidae) and Cotesia vestalis (Hymenoptera: Braconidae) Parasitizing Plutella xylostella (Lepidoptera: Plutellidae) in Kenya." Journal of Economic Entomology 112, no. 5 (2019): 2094–102. http://dx.doi.org/10.1093/jee/toz144.

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AbstractThe diamondback moth (DBM), Plutella xylostella L., is the most destructive pest affecting vegetable production in Kenya and around the world. Parasitoids have shown promising results in lowering the pest populations and damage caused by DBM. However, variations in host plant quality have been reported to have bottom-up effects up to the third and fourth trophic levels. We assessed the effects of two cultivated Brassica varieties (cabbage, Brassica oleracea var. capitata L. cultivar ‘Gloria F1’ and kale, B. oleracea var. acephala L. cultivar ‘Thousand headed’) on the development and performance of the specialist pest P. xylostella and two exotic parasitoids Diadegma semiclausum (Hellen) and Cotesia vestalis (Haliday). The exposed larval period of DBM took about 1.5 d longer on kale than cabbage and the total immature development time of both females and males was significantly longer on kale than cabbage. Higher pupal weight and higher fecundity were recorded on DBM fed on kale. Development time of D. semiclausum and C. vestalis was not affected by the host crop as was the parasitism rate of D. semiclausum. Heavier male pupae and larger adults of D. semiclausum, as well as more fecund adults of C. vestalis, were obtained from hosts fed on cabbage. Larger adults of C. vestalis were obtained from herbivores fed on kale. These results show potentially positive effects of host plant allelochemicals that are detrimental to herbivores while promoting parasitoid development and performance, which can be harnessed for the control of DBM.

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Asmoro, P. P., Dadang, Pudjianto, and I. W. Winasa. "The effect of flower morphology on the longevity of Diadegma semiclausum (Hymenoptera: Ichneumonidae)." IOP Conference Series: Earth and Environmental Science 694, no. 1 (2021): 012049. http://dx.doi.org/10.1088/1755-1315/694/1/012049.

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Ohara, Yoshitsugu, Akio Takafuji, and Junji Takabayashi. "Response to host-infested plants in females of Diadegma semiclausum Hellen (Hymenoptera: Ichneumonidae)." Applied Entomology and Zoology 38, no. 1 (2003): 157–62. http://dx.doi.org/10.1303/aez.2003.157.

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Kadirvel, P., R. Srinivasan, Lin Mei-ying, Ebraheem Al-Jouri, M. Walid Idraw, and R. C. de la Peña. "Occurrence of Diadegma semiclausum, a parasitoid of diamondback moth in lowlands of Syria." Journal of Asia-Pacific Entomology 14, no. 1 (2011): 52–57. http://dx.doi.org/10.1016/j.aspen.2010.11.006.

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Etebari, Kayvan, Mazhar Hussain, and Sassan Asgari. "Identification of microRNAs from Plutella xylostella larvae associated with parasitization by Diadegma semiclausum." Insect Biochemistry and Molecular Biology 43, no. 4 (2013): 309–18. http://dx.doi.org/10.1016/j.ibmb.2013.01.004.

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Ohara, Yoshitsugu, Akio Takafuji, and Junji Takabayashi. "Factors affecting the patch-leaving decision of the parasitic wasp Diadegma semiclausum (Hymenoptera: Ichneumonidae)." Applied Entomology and Zoology 38, no. 2 (2003): 211–14. http://dx.doi.org/10.1303/aez.2003.211.

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Wei, Shu-jun, Min Shi, Jun-hua He, M. Sharkey, and Xue-xin Chen. "The complete mitochondrial genome of Diadegma semiclausum (Hymenoptera: Ichneumonidae) indicates extensive independent evolutionary events." Genome 52, no. 4 (2009): 308–19. http://dx.doi.org/10.1139/g09-008.

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Few complete mitochondrial genomes representing limited families in the order Hymenoptera have been sequenced. Here, we sequenced the complete mitochondrial genome of Diadegma semiclausum (Hymenoptera: Ichneumonidae). This genome is 18 728 bp long, the second largest hexapod mitochondrial genome sequenced in its entirety and that with the highest A+T content at 87.4%. Four tRNAs are rearranged compared with the ancestral arrangement. Gene rearrangement mechanisms are different among all three rearranged regions. Six tRNAs have a large variable loop, which is not found in other metazoan mitochondrial genomes. trnS(AGY) uses the abnormal anticodon TCT but trnK uses the normal CTT. The A+T-rich region is very long (2161 bp). An extremely A+T-rich (99.1%) 1515 bp tandem repeat region with three types of repeat elements is located between cox1 and cox2, and the most likely ancestral element originated from the 3′ end of cox1. Independent tandem duplications followed by mutation–insertion–deletion is the best model to explain the formation of this region. These results indicate that independent evolutionary events occurred extensively, such as gene rearrangement events, gene rearrangement mechanisms, derivation of tRNA variable loops, and tandem repeat region evolutionary processes, all of which likely contribute to the diversified features of hymenopteran mitochondrial genomes.

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Yazdani, Maryam, and Greg Baker. "A plant volatile-based attractant formulation is not attractive to Diadegma semiclausum (Hymenoptera: Ichneumonidae)." Austral Entomology 57, no. 3 (2017): 359–64. http://dx.doi.org/10.1111/aen.12285.

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Juric, I., W. Salzburger, and O. Balmer. "Spread and global population structure of the diamondback moth Plutella xylostella (Lepidoptera: Plutellidae) and its larval parasitoids Diadegma semiclausum and Diadegma fenestrale (Hymenoptera: Ichneumonidae) based on mtDNA." Bulletin of Entomological Research 107, no. 2 (2016): 155–64. http://dx.doi.org/10.1017/s0007485316000766.

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AbstractThe diamondback moth (DBM) (Plutella xylostella) is one of the main pests of brassicaceous crops worldwide and shows resistance against a wide range of synthetic insecticides incurring millions of dollars in control costs every year. The DBM is a prime example of the introduction of an exotic species as a consequence of globalization. In this study we analyzed the genetic population structure of the DBM and two of its parasitic wasps, Diadegma semiclausum and Diadegma fenestrale, based on mitochondrial DNA sequences. We analyzed DBM samples from 13 regions worldwide (n = 278), and samples of the two wasp species from six European and African countries (n = 131), in an attempt to reconstruct the geographic origin and phylogeography of the DBM and its two parasitic wasps. We found high variability in COI sequences in the diamondback moth. Haplotype analysis showed three distinct genetic clusters, one of which could represent a cryptic species. Mismatch analysis confirmed the hypothesized recent spread of diamondback moths in North America, Australia and New Zealand. The highest genetic variability was found in African DBM samples. Our data corroborate prior claims of Africa as the most probable origin of the species but cannot preclude Asia as an alternative. No genetic variability was found in the two Diadegma species. The lack of variability in both wasp species suggests a very recent spread of bottlenecked populations, possibly facilitated by their use as biocontrol agents. Our data thus also contain no signals of host-parasitoid co-evolution.

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SURIPTO, SURIPTO, SUKIMAN SUKIMAN, and ERIN RYANTIN GUNAWAN. "Insecticidal selectivity of jayanti plant (Sesbania sesban) for integrated control of diamondback moth (Plutella xylostella)." Asian Journal of Agriculture 1, no. 02 (2017): 80–84. http://dx.doi.org/10.13057/asianjagric/g010205.

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Suripto, Sukiman, Gunawan ER. 2017. Insecticidal selectivity of jayanti plant (Sesbania sesban) for integrated control of diamondback moth (Plutella xylostella). Asian J Agric 1: 80-84. It has been known previously that leaves of the jayanti plant (Sesbania sesban (L.) Merr.) containing insecticidal ingredients. This study aimed to evaluate the insecticidal selectivity of various extract fractions of S. sesban leaf for the integrated control of cabbage pest, the diamondback moths (Plutella xylostella). Dried leaf powders from S. sesban were extracted in stages by using hexane, dichloromethane (DCM), ethanol, and water, successively. Each of insecticidal performance of S. sesban leaf extract fractions was tested against two types of test insects, namely P. xylostella larvae as target and Diadegma semiclausum imago as non target insects according to completely randomized design in the cabbage plantation at the village of Sembalun, East Lombok, Indonesia. Each mortality data of P. xylostella larvae and D. semiclausum imago processed by probit analysis to determine the concentration of the death of 50% of test insects (LC50) of each test extract. The results showed that the LC50 of S. sesban leaf extracts classified into four fractions, namely hexane, DCM, and water extract fractions to P. xylostella larvae successively was 343.71, 294.78, 29.95, and 1197.13 ppm, and to D. semiclausum imago row was 305.5, 121.56, 37.38, and 1043.70 ppm. The results showed that the insecticidal activity of S. sesban leaf ethanol extract fraction was selective, because its selectivity value is 1.25. On the other hand each insecticidal performance of three S. sesban leaf extracts, i.e. hexane, DCM, and water extract fractions, respectively is not selective, with the selectivity values are 0.89, 0.41, and 0.87.

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Snoeren, Tjeerd A. L., Roland Mumm, Erik H. Poelman, Yue Yang, Eran Pichersky, and Marcel Dicke. "The Herbivore-Induced Plant Volatile Methyl Salicylate Negatively Affects Attraction of the Parasitoid Diadegma semiclausum." Journal of Chemical Ecology 36, no. 5 (2010): 479–89. http://dx.doi.org/10.1007/s10886-010-9787-1.

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Saini, A., and P. L. Sharma. "Interspecific Competition Between Cotesia vestalis (Halliday) and Diadegma semiclausum (Hellen), Parasitoids of Plutella xylostella (L.)." National Academy Science Letters 43, no. 3 (2019): 287–89. http://dx.doi.org/10.1007/s40009-019-00844-8.

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Roßbach, A., B. Löhr, and S. Vidal. "Generalism Versus Specialism: Responses of Diadegma mollipla (Holmgren) and Diadegma semiclausum (Hellen), to the Host Shift of the Diamondback Moth (Plutella xylostella L.) to Peas." Journal of Insect Behavior 18, no. 4 (2005): 491–503. http://dx.doi.org/10.1007/s10905-005-5607-9.

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Li, D., N. Schellhorn, and O. Schmidt. "Detection of parasitism in diamondback moth, Plutella xylostella (L.), using differential melanization and coagulation reactions." Bulletin of Entomological Research 97, no. 4 (2007): 399–405. http://dx.doi.org/10.1017/s0007485307005123.

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AbstractDiamondback moth (DBM), Plutella xylostella, is known for causing damage to Brassica crops and developing resistance to chemical and biological pesticides; it has become one of the most difficult pests to manage in many regions around the world. The only way to reduce reliance on pesticides is to maximize the role of natural control agents for integrated pest management programs and be able to incorporate the mortality from control agents into pest control decision-making. More than 90 hymenopterous parasitoids are associated with DBM worldwide; among them, Diadegma semiclausum, is a major endoparasitoid of P. xylostella. To optimize parasitism of pests in pest control decision-making, it is necessary to develop rapid and simple methods for distinguishing parasitized from non-parasitized larvae in the field. Here we report on a number of diagnostic tools to identify parasitized larvae. One is based on differential melanization reactions in hemolymph due to immune suppression in parasitized larvae. The lack of coagulation reactions in hemolymph provides a simple initial test, where squashing a non-parasitized larva onto nitrocellulose membrane traps chlorophyll-containing gut content on the membrane leaving a green dot of clotted gut material. However, in immune-suppressed parasitized larvae, the gut content was washed away in absence of coagulation reactions and the membrane lacks a green dot. This tool alone or combined with others, allows quick detection of parasitized caterpillars in the field. We further showed that the antibody MAb 9A5 can be used to detect D. semiclausum parasitized larvae of DBM in Western blots.

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Maulina, Fri, and Muflihayati Muflihayati. "Conservation of Diadegma semiclausum Hellen. Parasitoids as Biological Control to Plutella xylostella Linn. with Adult Food Exploration." International Journal on Advanced Science, Engineering and Information Technology 3, no. 5 (2013): 335. http://dx.doi.org/10.18517/ijaseit.3.5.338.

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Kwon, Min, Kang-Ryong Park, and Hye-Jin Kwon. "Developmental Characteristics of Diadegma semiclausum Hellen (Hymenoptera: Ichneumonidae), a Larval Parasitoid of Plutella xylostella L. (Lepidoptera: Yponomeutidae)." Journal of Asia-Pacific Entomology 6, no. 1 (2003): 105–10. http://dx.doi.org/10.1016/s1226-8615(08)60175-2.

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Tonnang, Henri E. Z., Lev V. Nedorezov, John O. Owino, Horace Ochanda, and Bernhard Löhr. "Evaluation of discrete host–parasitoid models for diamondback moth and Diadegma semiclausum field time population density series." Ecological Modelling 220, no. 15 (2009): 1735–44. http://dx.doi.org/10.1016/j.ecolmodel.2009.04.012.

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Lavandero, Blas, Steve Wratten, Parviz Shishehbor, and Sue Worner. "Enhancing the effectiveness of the parasitoid Diadegma semiclausum (Helen): Movement after use of nectar in the field." Biological Control 34, no. 2 (2005): 152–58. http://dx.doi.org/10.1016/j.biocontrol.2005.04.013.

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Momanyi, Caleb, Bernhard Löhr, and Linus Gitonga. "Biological impact of the exotic parasitoid, Diadegma semiclausum (Hellen), of diamondback moth, Plutella xylostella L., in Kenya." Biological Control 38, no. 2 (2006): 254–63. http://dx.doi.org/10.1016/j.biocontrol.2006.03.003.

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Wang, X. G., and M. A. Keller. "Patch Time Allocation by the Parasitoid Diadegma semiclausum (Hymenoptera: Ichneumonidae). II. Effects of Host Density and Distribution." Journal of Insect Behavior 18, no. 2 (2005): 171–86. http://dx.doi.org/10.1007/s10905-005-0473-z.

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Wang, X. G., and M. A. Keller. "Patch Time Allocation by the Parasitoid Diadegma semiclausum (Hymenoptera: Ichneumonidae). III. Effects of Kairomone Sources and Previous Parasitism." Journal of Insect Behavior 17, no. 6 (2004): 761–76. http://dx.doi.org/10.1023/b:joir.0000048987.10357.a6.

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Furlong, Michael J. "Infection of the immature stages of Diadegma semiclausum, an endolarval parasitoid of the diamondback moth, by Beauveria bassiana." Journal of Invertebrate Pathology 86, no. 1-2 (2004): 52–55. http://dx.doi.org/10.1016/j.jip.2004.03.006.

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., Idris A. B., B. A. H. Zainal-Abid ., I. Noraini ., and A. K. Hussan . "Diadegma semiclausum as a Possible Factor for the Horizontal Transmission of Microsporidial Disease of Diamondback Moth, Plutella xylostella L." Pakistan Journal of Biological Sciences 4, no. 11 (2001): 1353–55. http://dx.doi.org/10.3923/pjbs.2001.1353.1355.

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Pourian, Hamid-Reza, Reza Talaei-Hassanloui, Ahmad Ashouri, Hossein-Ali Lotfalizadeh, and Jamasb Nozari. "Ontogeny and reproductive biology of Diadegma semiclausum (Hym.: Ichneumonidae), a larval endoparasitoid of Diamondback Moth, Plutella xylostella (Lep.: Plutellidae)." Arthropod Structure & Development 44, no. 1 (2015): 69–76. http://dx.doi.org/10.1016/j.asd.2014.11.002.

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Huang, Fang, Ting-Ting Cao, Min Shi, Ya-Feng Chen, and Xue-xin Chen. "Parasitism-induced effects on host growth and metabolic efficiency in Plutella xylostella larvae parasitized by Cotesia vestalis or Diadegma semiclausum." Insect Science 15, no. 3 (2008): 237–43. http://dx.doi.org/10.1111/j.1744-7917.2008.00206.x.

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IGA, Mikio. "Effect of Release of Introduced Ichneumonid Parasitoid, Diadegma semiclausum (Hellen) on Diamondback Moth, Plutella xylostella (L) in Experimental Cabbage Field." Japanese journal of applied entomology and zoology 41, no. 4 (1997): 195–99. http://dx.doi.org/10.1303/jjaez.41.195.

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Houshyani, Benyamin, Maryam Assareh, Antoni Busquets, Albert Ferrer, Harro J. Bouwmeester, and Iris F. Kappers. "Three-step pathway engineering results in more incidence rate and higher emission of nerolidol and improved attraction of Diadegma semiclausum." Metabolic Engineering 15 (January 2013): 88–97. http://dx.doi.org/10.1016/j.ymben.2012.10.002.

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HASEEB, MUHAMMAD, HIROSHI AMANO, and TONG-XIAN LIU. "Effects of selected insecticides on Diadegma semiclausum (Hymenoptera: Ichneumonidae) and Oomyzus sokolowskii (Hymenoptera: Eulophidae), parasitoids of Plutella xylostella (Lepidoptera: Plutellidae)." Insect Science 12, no. 3 (2005): 163–70. http://dx.doi.org/10.1111/j.1005-295x.2005.00020.x.

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Gols, Rieta, Gaylord A. Desurmont, and Jeffrey A. Harvey. "Variation in Performance and Resistance to Parasitism of Plutella xylostella Populations." Insects 10, no. 9 (2019): 293. http://dx.doi.org/10.3390/insects10090293.

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Two major ecological factors determine the fitness of an insect herbivore: the ability to overcome plant resistance strategies (bottom-up effects) and the ability to avoid or resist attack by natural enemies such as predators and parasitoids (top-down effects). In response to differences in selection pressure, variation may exist in host-plant adaptation and immunity against parasitism among populations of an insect herbivore. We investigated the variation in larval performance of six different Plutella xylostella populations originating from four continents when feeding on a native Dutch plant species, Brassica rapa. One of the used populations has successfully switched its host plant, and is now adapted to pea. In addition, we determined the resistance to attack by the endoparasitoid Diadegma semiclausum originating from the Netherlands (where it is also native) and measured parasitoid performance as a proxy for host resistance against parasitism. Pupal mortality, immature development times, and adult biomass of P. xylostella differed significantly across populations when feeding on the same host plant species. In addition, parasitism success differed in terms of parasitoid adult emergence and their biomass, but not their development times. Variation among natural populations of insects should be considered more when studying interactions between plants and insects up the food chain.

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Soufbaf, M., Y. Fathipour, J. Karimzadeh, and M. P. Zalucki. "Effects of plant availability on population size and dynamics of an insect community: diamondback moth and two of its parasitoids." Bulletin of Entomological Research 104, no. 4 (2014): 418–31. http://dx.doi.org/10.1017/s0007485314000054.

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AbstractTo understand the effect of plant availability/structure on the population size and dynamics of insects, a specialist herbivore in the presence of two of its parasitoids was studied in four replicated time-series experiments with high and low plant availabilities; under the latter condition, the herbivore suffered from some periods of resource limitation (starvation) and little plant-related structural refuges. Population dynamics of the parasitoid Cotesia vestalis was governed mainly by the delayed density-dependent process under both plant setups. The parasitoid, Diadegma semiclausum, under different plant availabilities and different coexistence situations (either +competitor or –competitor) showed dynamics patterns that were governed mainly by the delayed density process (significant lags at weeks 2–4). Both the competing parasitoids did not experience beneficial or costly interferences from each other in terms of their own population size when the plant resource was limited. Variation in the Plutella xylostella population under limited plant availability is higher than that under the other plant setup. For both parasitoids, under limited plant setup, the extinction risk was lower when parasitoids were engaged in competition, while under the unlimited plant setup, the mentioned risk was higher when parasitoids competed. In this situation, parasitoids suffered from two forces, competition and higher escaped hosts.

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Shi, Z. H., Q. B. Li, and X. Li. "Interspecific competition between Diadegma semiclausum Hellen (Hym., Ichneumonidae) and Cotesia plutellae (Kurdjumov) (Hym., Braconidae) in parasitizing Plutella xylostella (L.) (Lep., Plutellidea)." Journal of Applied Entomology 128, no. 6 (2004): 437–44. http://dx.doi.org/10.1111/j.1439-0418.2004.00869.x.

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Kahuthia-Gathu, R., B. Löhr, and H. M. Poehling. "Effect of common wild crucifer species of Kenya on fitness of two exotic diamondback moth parasitoids, Cotesia plutellae and Diadegma semiclausum." Crop Protection 27, no. 12 (2008): 1477–84. http://dx.doi.org/10.1016/j.cropro.2008.06.003.

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Noda, Takashi, Shun’ichi Miyai, Kenji Takashino, and Akiko Nakamura. "Density suppression of Plutella xylostella (Lepidoptera: Yponomeutidae) by multiple releases of Diadegma semiclausum (Hymenoptera: Ichneumonidae) in cabbage fields in Iwate, northern Japan." Applied Entomology and Zoology 35, no. 4 (2000): 557–63. http://dx.doi.org/10.1303/aez.2000.557.

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Bianchi, F. J. J. A., N. A. Schellhorn, and W. van der Werf. "Predicting the time to colonization of the parasitoid Diadegma semiclausum: The importance of the shape of spatial dispersal kernels for biological control." Biological Control 50, no. 3 (2009): 267–74. http://dx.doi.org/10.1016/j.biocontrol.2009.04.014.

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Zarkani, Agustin, and Djoko Prijono. "EFIKASI INSEKTISIDA NABATI EKSTRAK DAUN Tephrosia vogelii Hook. TERHADAP Crocidolomia pavonana (F.) dan Plutella xylostella (L.) SERTA PENGARUHNYA PADA Diadegma semiclausum (Hellen)." Jurnal Ilmu-Ilmu Pertanian Indonesia 12, no. 1 (2017): 68–75. http://dx.doi.org/10.31186/jipi.12.1.68-75.

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Winkler, Karin, Felix L. Wäckers, Attila Stingli, and Joop C. Van Lenteren. "Plutella xylostella (diamondback moth) and its parasitoid Diadegma semiclausum show different gustatory and longevity responses to a range of nectar and honeydew sugars." Entomologia Experimentalis et Applicata 115, no. 1 (2005): 187–92. http://dx.doi.org/10.1111/j.1570-7458.2005.00254.x.

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Huang, Fang, Min Shi, Xue-xin Chen, Gong-Yin Ye, and Jun-Hua He. "External Morphology and Development of Immature Stages of Diadegma semiclausum (Hymenoptera: Ichneumonidae), an Important Endoparasitoid of Plutella xylostella (Lepidoptera: Plutellidae)." Annals of the Entomological Society of America 102, no. 3 (2009): 532–38. http://dx.doi.org/10.1603/008.102.0325.

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