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Journal articles on the topic 'Leptocoris'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Qadir, Ishana, and Ayesha Qamar. "Pheromone Producing Dorsal Abdominal Glands in Leptocoris augur." Biosciences, Biotechnology Research Asia 15, no. 1 (March 25, 2018): 187–93. http://dx.doi.org/10.13005/bbra/2623.

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Morphology of the scent (pheromone) glands is the first and basic step in understanding the mechanism of working of this highly evolved and integrated system of communication in insects. Leptocoris augur contains a pair of large and distinct symmetric exocrine dorsal abdominal glands (DAGs) found in the dorsal abdominal segments. The glands are simple, voluminous, sac-like and bright orange that turn brown and downsized with age. They are invested with a large and dense network of trachea and open to the exterior via minute slit shaped openings in the form of ostioles that remain permanently open to the outside. The functional specificity of these glands can be associated with the activities ranging from aggregation to sexual behaviours like courtship and mating. The mating is not restricted to a specific season, being distributed all-round the year; however, the insect prefers low and humid temperature for mating and they can be seen congregating in huge numbers when the hot summers subside and the rainy season arrives. We didn’t observe any considerable variation in size of these glands with respect to the body size in between the instars and the adults. Further, there were no significant difference between males and females in terms of the size of these DAGs.

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2

Ho, Hsiao-Yung, Yun-Che Hsu, Jen-Zon Ho, Li-Wen Lo, and Ya-Chun Chuang. "Volatiles in the Dorsal Abdominal Glands and Exuviae of Leptocoris abdominalis and Leptocoris augur (Heteroptera: Rhopalidae)." Annals of the Entomological Society of America 99, no. 5 (September 1, 2006): 859–64. http://dx.doi.org/10.1603/0013-8746(2006)99[859:vitdag]2.0.co;2.

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3

Carroll, Scott P., Jenella E. Loye, Hugh Dingle, Michael Mathieson, and Myron P. Zalucki. "Ecology of Leptocoris Hahn (Hemiptera: Rhopalidae) soapberry bugs in Australia." Australian Journal of Entomology 44, no. 4 (November 2005): 344–53. http://dx.doi.org/10.1111/j.1440-6055.2005.00499.x.

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4

SCHOENWETTER, W., D. SQUILLACE, and J. YUNGINGER. "203 Asthma caused by sensitization to boxelder bug (BE) (Leptocoris trivittatus)." Journal of Allergy and Clinical Immunology 87, no. 1 (January 1991): 189. http://dx.doi.org/10.1016/0091-6749(91)91486-d.

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5

Schaefer, Carl W., and Robert W. Sites. "Leptocoris rufomarginatus(Hemiptera: Rhopalidae) in Vietnam, with a note onLeptocoris vicinusin Guam." Oriental Insects 43, no. 1 (January 2009): 15–16. http://dx.doi.org/10.1080/00305316.2009.10417570.

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6

SATYANARAYANA, K., and KUMUDA SUKUMAR. "Sterility and retardation of oocyte growth by penfluron in soapnut bug Leptocoris coimbatorensis (Gross) (Hemiptera, Coreidae)." Zeitschrift für Angewandte Entomologie 100, no. 1-5 (August 26, 2009): 367–72. http://dx.doi.org/10.1111/j.1439-0418.1985.tb02793.x.

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7

Foster, Jarryd D., Allan G. Ellis, Llewellyn C. Foxcroft, Scott P. Carroll, and Johannes Le Roux. "The potential evolutionary impact of invasive balloon vines on native soapberry bugs in South Africa." NeoBiota 49 (July 25, 2019): 19–35. http://dx.doi.org/10.3897/neobiota.49.34245.

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Following their establishment in new communities, invasive species may cause evolutionary changes in resident native species. This is clearly true for phytophagous insects, which may adapt rapidly when utilising abundant and widespread introduced hosts. The balloon vines Cardiospermumhalicacabum and C.grandiflorum were introduced to South Africa approximately 100 years ago and are classified as minor and major weeds, respectively. Here we assess the potential evolutionary impact of these vines on native Leptocoris soapberry bug populations in Kruger National Park (KNP), using phylogenetic and morphometric analyses. We found that soapberry bugs associated with C.halicacabum are genetically and morphologically distinct from those associated with C.grandiflorum. This suggests that native soapberry bugs in KNP exhibit some degree of host preference, indicating that these vines may have had significant evolutionary consequences for these insects. The proboscis length of soapberry bugs feeding on C.halicacabum closely matched fruit size, often being longer than fruit size at the population level. These soapberry bugs are therefore well-suited to feeding on this introduced plant species.

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8

Göllner-Scheiding, U. "Revision der afrikanischen Arten sowie Bemerkungen zu weiteren Arten der Gattungen Leptocoris HAHN, 1833, und Boisea KIRKALDY, 1910 (Het., Rhopalidae)." Deutsche Entomologische Zeitschrift 27, no. 1-3 (April 23, 2008): 103–48. http://dx.doi.org/10.1002/mmnd.19800270113.

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9

TA, Effendy, Robby Septiadi, Abdullah Salim, and Abdul Mazid. "JAMUR ENTOMOPATOGEN ASAL TANAH LEBAK DI SUMATERA SELATAN DAN POTENSINYA SEBAGAI AGENSIA HAYATI WALANG SANGIT (LEPTOCORISA ORATORIUS (F.))." Jurnal Hama dan Penyakit Tumbuhan Tropika 10, no. 2 (June 30, 2010): 154–61. http://dx.doi.org/10.23960/j.hptt.210154-161.

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Entomopathogenic fungi from the lowland soil of South Sumatera and their potential as biocontrol agents of Stink Bug (Leptocorisa oratorius (F.)). The purpose of this research was to explore and examine the potential of soil borne entomopathogenic fungi from South Sumatera as biological agents of Leptocorisa oratorius (F). Soil used for trapping entomopatogenic fungi, was taken from five locations in South Sumatera. Percentage of nymph mortality was analyzed by using analysis of variance and arranged in Completely Randomized Design. LT50 of nymph mortality was determined with Probit Analysis. Entomopathogenic fungi found in this research were Beauveria bassiana and Metarhizium sp. Stink bug mortality due to B. bassiana isolates reached 40-73.3% and Metarhizium sp. reached 56.7-70%. The results showed that Metarhizium isolates were more virulent than B. bassiana isolates. The viability of B. bassiana conidia did not decrease during sub-culturing. Sub-culturing did not influence the mortality of stink bug nymph but it prolonged the LT50 of the stink bug.

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10

Rubia, E. G., and B. M. Shepard. "Biology of Metioche vittaticollis (Stål) (Orthoptera: Gryllidae), a predator of rice pests." Bulletin of Entomological Research 77, no. 4 (December 1987): 669–76. http://dx.doi.org/10.1017/s0007485300012189.

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AbstractThe biology of the predacious cricket Metioche vittaticollis (Stål) collected from rice in the Philippines was studied in the laboratory and greenhouse. The cricket preyed on the eggs of a range of insect pests of rice including Chilo suppressalis (Walker), Cnaphalocrocis medinalis (Guenée), Hydrellia philippina Ferino, Mythimna separata (Walker) and to a lesser extent on the eggs of Leptocorisa oratorius (F.). There was no predation on the eggs of Scirpophaga incertulas (Walker).

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11

Desita Salbiah and Nizwan Harefa. "UJI BEBERAPA KONSENTRASI EKSTRAK RIMPANG JERINGAU (Acorus calamus L.) UNTUK MENGENDALIKAN HAMA WALANG SANGIT (Leptocorisa acuta Thunberg) PADA TANAMAN PADI GOGO (Oryza sativa L.)." DINAMIKA PERTANIAN 34, no. 2 (August 6, 2020): 129–38. http://dx.doi.org/10.25299/dp.2018.vol34(2).5422.

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ABSTRACT Government efforts in supporting the increase in national rice production, namely optimizing dry land by planting upland rice. Rice seed bug (Leptocorisa acuta Thunberg) is a potential pest that at certain times become an important pest on the upland rice plants, therefore needed to control is using organic insecticide such as sweet flag rhizome extract. This research was aimed to obtain an effective concentration sweet flag rhizome extract (Acorus calamus L.) to control rice seed bug pest (Leptocorisa acuta Thunberg) on the upland rice plant (Oryza sativa L.). The research was conducted at the Experimental Garden and Plant Pest Laboratory, Faculty of Agriculture, Riau University, Pekanbaru from January to May 2018. The experimentally by using a completely randomized design (CRD), which consist of five concentration sweet flag rhizome extract treatments are 0 g.l-1 water, 20 g.l-1 water, 40 g.l-1 water, 60 g.l-1 water and 80 g.l-1 water. The treatments repeated four times, therefore, twenty experimental units. The results showed that the concentration of 80 g.l-1 water was an effective concentration to control rice seed bug with the fastest start time of death at 1,25 hours, the fastest LT50 at 30,25 hours and the total mortality rate of 87,50%. Keywords: Organic insecticide, Sweet Flag Rhizome, Rice Seed Bug, Upland Rice

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12

Akter, Ummey Salma, Khandakar Shariful Islam, Mahbuba Jahan, Md Sohanur Rahman, Fakhar Uddin Talukder, and Md Arefin Hasan. "EXTENT OF DAMAGE OF RICE BUG (Leptocorisa Acuta) AND ITS CONTROL WITH INSECTICIDES." Acta Scientifica Malaysia 4, no. 2 (September 30, 2020): 82–87. http://dx.doi.org/10.26480/asm.02.2020.82.87.

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The rice bug, Leptocorisa acuta is one of the major and destructive pests of rice. The experiments were conducted to study on the extent of damage of rice bug, Leptocorisa acuta and to determine the efficacy of five insecticides. The experiments were laid out in a Randomized Complete Block Design (RCBD) with three replications of each treatment. From the study it was found that the infestation rate was in linear progress and the hill infestation was 5.42 to 13.75%, panicle infestation was 27.27 to 54.55%, grain infestation was 4.70 to 7.58% and partial grain infestation was 1.82 to 2.58% respectively. After using different treatments, it was found that the maximum percent of infestation was observed in control and minimum was in Malathion 57 EC treated plot. The maximum no. of grain per panicle was observed in case of Malathion 57 EC (206.4), whereas the minimum was observed in Control (172.6) plot. Malathion and Neem oil showed similar effect when yield was compared while the minimum yield was observed in control treatment. The efficacy of insecticides was ranked as Malathion 57 EC > Azadiractin 2% > Chlorpyrifos 20 EC > Voliam flexi 300 SC > Imidacloprid 17.8 SL. The efficacy of all insecticides on the infestation of rice at different time intervals indicate that all the toxicity of all the products decreases with the progress of time after application. It can be recommended that Malathion 57 EC was most effective chemical in controlling rice bug.

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13

GUPTA, A. P. "A consideration of the pterothorax of Leptocorisa costalis H.S. (Heteroptera: Coreidae)." Proceedings of the Royal Entomological Society of London. Series A, General Entomology 40, no. 1-3 (April 2, 2009): 15–18. http://dx.doi.org/10.1111/j.1365-3032.1965.tb00295.x.

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14

Ito, Kiyomitsu, and Mohd Noor N. S. Nik. "Reproductive diapause and quiescence in a tropical rice bug, Leptocorisa oratorius." Entomologia Experimentalis et Applicata 68, no. 1 (July 1993): 71–77. http://dx.doi.org/10.1111/j.1570-7458.1993.tb01690.x.

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15

Takeuchi, Hiroaki, and Tomonari Watanabe. "Mortality Factors of Eggs of Leptocorisa chinensis (Hemiptera: Alydidae) in Rice Fields." Journal of Economic Entomology 99, no. 2 (April 1, 2006): 366–72. http://dx.doi.org/10.1093/jee/99.2.366.

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16

Morrill, W. L., N. Pen-Elec, and L. P. Almazon. "Effects of Weeds on Fecundity and Survival of Leptocorisa oratorius (Hemiptera: Alydidae)." Environmental Entomology 19, no. 5 (October 1, 1990): 1469–72. http://dx.doi.org/10.1093/ee/19.5.1469.

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17

Kim, Hwang, Sunghoon Baek, and Joon-Ho Lee. "Temperature-dependent development and oviposition models of Leptocorisa chinensis Dallas (Hemiptera: Alydidae)." Journal of Asia-Pacific Entomology 21, no. 1 (March 2018): 244–51. http://dx.doi.org/10.1016/j.aspen.2017.12.006.

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18

Solikhin, Solikhin. "KETERTARIKAN WALANG SANGIT (Leptocorisa oratorius F.) TERHADAP BEBERAPA BAHAN ORGANIK YANG MEMBUSUK." Jurnal Hama dan Penyakit Tumbuhan Tropika 1, no. 1 (March 2, 2001): 16–24. http://dx.doi.org/10.23960/j.hptt.1116-24.

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Attractiveness of Rice Bug (Leptocorisa oratorius F.) to Several Faunal Decaying Materials. An experiment was conducted in Yogyakarta from October 1996 to September 1997 to know (1) the attractiveness of adult male versus female rice stink bug in to decaying crab, (2) the attractiveness of the rice stink bug from the result of point-1 to five decaying materials, and (3) the volatile compounds emitted by each decaying material. For the first objective, 50 rice stink bugs (sex ratio 1:1) were released into a preference test cage for one hour. Data was then analyzed with X2 at 1 and 5%. For the second objective, five replicates of five different treatments were arranged in randomized completely block design. As many as 125 rice stink bugs were released into the central part of the cage consisting of five equal parts of attractants for one hour. Data of rice stink bug from each part was analyzed with Anova continued with Duncan's Test at 1 and 5%.. Volatile compounds emitted by each material were captured based on the method of Gamliel and Stapleton (1993) then identified with gas chromatography mass spectrophotometry (GC-MS) and (or) capillary gas chromatography. The results were that: (1) adult male rice bug was significantly more attracted to that of female in response to sixth-day-decaying-crab, (2) adult male rice bug was most attracted to sixth-day-decaying cow blood compared to four others, and (3) volatile compounds emitted by those five materials were carbon dioxide, methanol, ethanol, aceton, dimethyl sulphide, dimethyl disulphide, ammonia, acetic acid, and an unidentified compound.

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19

Souza, Christiane Sampaio de, Laura Rodrigues da Conceição, and Paulo de Oliveira Mafalda Junior. "Hyperiid amphipods around the seamounts and islands off northeastern Brazil." Brazilian Journal of Oceanography 64, no. 4 (December 2016): 339–52. http://dx.doi.org/10.1590/s1679-87592016123306404.

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Abstract Data collected on large-scale surveys around the seamounts and islands off northeastern Brazil provide information on the hyperiid amphipod populations. Thirty-six species were identified. Most of the species belong to the Infraorder Physocephalata, representing 21 genera and 13 families. Thirteen species (Vibilia australis, L. latissimus, L. macrophthalmus, L. schizogeneios, Phronima atlantica, Phrosina semilunata, Primno brevidens, Eupronoe minuta, Oxycephalus clause, Rhabdosoma whitei, Amphithyrus bispinosus, Leptocotis tenuirostris and Tetrathyrus forcipatus) have not previously been recorded in this region. The spatial distribution of the hyperiid amphipods was very patchy. Each area of these amounts and islands off northeastern Brazil has different oceanographic features and can be characterised by a clearly defined group of most abundant species.

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20

Javandira, Cokorda, I. Made Suryana, I. Gusti Lanang Agung Ary Widiatmika, Putu Agus Wahyu Ekantara, Nufus Widhi Rahayu, and Kadek Yudistira Mahendra Putra. "Pengenalan LECOATRAP (Leptocorisa oratorius Trap) sebagai Solusi Pengendalian Hama Walang Sangit di Subak Umalayu." WIDYABHAKTI Jurnal Ilmiah Populer 3, no. 1 (December 30, 2020): 130–35. http://dx.doi.org/10.30864/widyabhakti.v3i1.236.

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Subak umalayu merupakan salah satu kawasan lahan pertanian di Kota Denpasar dimana masih terdapat beberapa masaalah yang dihadapi oleh petani salah satunya merupakan serangan hama walang sangit. Serangan hama walang sangit merupakan serangga yang menyerang bulir pada tanaman padi yang menjadi hampa, serangan hama walang sangit biasanya terjadi pada fase generative/masak susu, upaya yang sudah dilakukan oleh petani subak umalayu adalah penyemprotan pestisida tetapi serangan hama walang sangit terjadi kembali dikarenakan hama walang sangit hanya pergi sementara saat disemprot pestisida. Pengenalan teknologi LECOATRAP (Leptocorisa oratorius trap) diharapkan dapat mengendalian hama walang sangit yang berupa perangkap dan diberikan atraktan sebagai pemikat alami dapat mengatasi permasalah yang dihadapi oleh petani subak Umalayu sehingga hasil produksi tanaman padi dapat terjaga.

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21

Trizelia, Trizelia, and Novri Nelly. "Karakterisasi Fisiologi Beberapa Isolat Cendawan Entomopatogen Beauveria bassiana Dan Virulensinya Terhadap Spodoptera litura." JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) 1, no. 1 (December 19, 2017): 10. http://dx.doi.org/10.25077/jpt.1.1.10-17.2017.

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Penelitian ini bertujuan untuk mempelajari karakter fisiologi isolat B. bassiana yang berasal dari berbagai inang dan virulensinya terhadap Spodoptera litura. Lima isolat B. bassiana yang diuji diisolasi dari hama Leptocorisa oratorius (F.) dan Hypothenemus hampei (Ferr.), rizosfer tanaman bawang daun buah kakao dan batang gandum. Karakter fisiologi yang diamati adalah daya kecambah konidia, pertumbuhan koloni, dan sporulasi, Cendawan diperbanyak pada media SDAY dan uji virulensi dilakukan terhadap larva instar II S. litura. Hasil penelitian menunjukkan bahwa daya kecambah konidia, pertumbuhan koloni dan sporulasi bervariasi antar isolat. Isolat B. bassiana yang diisolasi dari L. oratorius dan buah kakao memiliki karakter fisiologi yang lebih baik dibandingkan dengan isolat lain. Kedua isolat ini juga lebih virulen terhadap larva instar II S. litura dengan mortalitas sebesar 80 – 81,67%.

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22

Watanabe, Tomonari, Hiroaki Takeuchi, Mami Ishizaki, Tetsuya Yasuda, Shin-Ichiro Tachibana, Rikiya Sasaki, Kiyomi Nagano, Yasuyo Okutani-Akamatsu, and Nobuhiro Matsuki. "Seasonal attraction of the rice bug, Leptocorisa chinensis Dallas (Heteroptera: Alydidae), to synthetic attractant." Applied Entomology and Zoology 44, no. 1 (2009): 155–64. http://dx.doi.org/10.1303/aez.2009.155.

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23

Takeuchi, Hiroaki, and Tomonari Watanabe. "Mortality Factors of Eggs of Leptocorisa chinensis (Hemiptera: Alydidae) in Rice Fields." Journal of Economic Entomology 99, no. 2 (April 1, 2006): 366–72. http://dx.doi.org/10.1603/0022-0493-99.2.366.

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24

Andres, J. F. "Performance Analysis of Locally Fabricated Electronic Electronic Rice Stink Bug (Leptocorisa Oratoriu. Fabricius) Control Device." KnE Social Sciences 3, no. 6 (June 4, 2018): 641. http://dx.doi.org/10.18502/kss.v3i6.2410.

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25

Bais, Brajesh, Ashwani Kumar, Hadi Husain Khan, Ramkinkar Sahu, and Pramod Kumar Kaiwart. "Efficacy of Certain Chemical Insecticides against Rice Gundhi Bug (Leptocorisa acuta Thunberg) Under Field Condition." International Journal of Current Microbiology and Applied Sciences 6, no. 8 (September 10, 2017): 1697–701. http://dx.doi.org/10.20546/ijcmas.2017.609.209.

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26

Yamashita, Ken-ichi, Shinji Isayama, Rika Ozawa, Masayoshi Uefune, Junji Takabayashi, and Kazuki Miura. "A pecky rice-causing stink bug Leptocorisa chinensis escapes from volatiles emitted by excited conspecifics." Journal of Ethology 34, no. 1 (September 14, 2015): 1–7. http://dx.doi.org/10.1007/s10164-015-0437-5.

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27

Leal, Walter Soares, Yasuo Ueda, and Mikio Ono. "Attractant pheromone for male rice bug,Leptocorisa chinensis: Semiochemicals produced by both male and female." Journal of Chemical Ecology 22, no. 8 (August 1996): 1429–37. http://dx.doi.org/10.1007/bf02027722.

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28

Khare, Vivek Kumar, Ravi Prakash, Sneha ., and Gautam Kunal. "Effect of abiotic factors on the population dynamics of paddy earhead bug, Leptocorisa oratorius F." Journal of Entomology and Zoology Studies 8, no. 6 (November 1, 2020): 157–60. http://dx.doi.org/10.22271/j.ento.2020.v8.i6b.8315.

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29

Saragih, Magdalena, Trizelia Trizelia, Nurbailis Nurbailis, and Yusniwati Yusniwati. "Uji Potensi Cendawan Endofit Beauveria bassiana terhadap Perkecambahan dan Pertumbuhan Bibit Tanaman Cabai Merah (Capsicum annuum L.)." Unri Conference Series: Agriculture and Food Security 1 (January 30, 2019): 151–59. http://dx.doi.org/10.31258/unricsagr.1a20.

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Peranan cendawan endofit dalam bidang pertanian banyak mendapat perhatian karena selain dapat meningkatkan ketahanan tanaman terhadap serangan hama maupun penyakit tanaman, juga mempunyai kemampuan dalam memacu perkecambahan dan pertumbuhan tanaman. Salah satu cendawan endofit yang diuji dalam penelitian ini adalah Beauveria bassiana berasal dari isolat tanaman gandum, tanaman kopi, tanaman kakao dan cendawan Beauveria bassiana dari serangga walang sangit (Leptocorisa acuta). Tujuan penelitian ini adalah untuk mengetahui kemampuan kolonisasi cendawan endofit Beauveria bassiana dari isolat gandum, kakao, kopi dan serangga walang sangit terhadap benih dan bibit cabai, untuk mendapatkan waktu yang terbaik dalam memacu perkecambahan dan pertumbuhan bibit cabai melalui metode perendaman benih dengan suspensi Beauveria bassiana selama 2, 6 dan 10 jam. Hasil penelitian menunjukan bahwa semua isolat Beauveria bassiana mampu mengkolonisasi benih maupun bibit tanaman cabai dan Bb dari isolat gandum merupakan isolat yang terbaik memacu perkecambahan dan pertumbuhan bibit cabai dengan perendaman benih selama 6 jam.

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30

Maulina, Fri, Novri Nelly, Hidrayani ., and Hasmiandy Hamid. "Temperature as a Key Aspect in the Survival of Hadronotus leptocorisae Offspring." Journal of Entomology 15, no. 1 (December 15, 2017): 13–18. http://dx.doi.org/10.3923/je.2018.13.18.

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31

Torres, Mark, Jade Lumansoc, and Cesar Demayo. "Variability in head shapes in three populations of the Rice Bug Leptocorisa oratorius (Fabricius) (Hemiptera: Alydidae)." Egyptian Academic Journal of Biological Sciences. A, Entomology 3, no. 1 (June 1, 2010): 173–84. http://dx.doi.org/10.21608/eajbsa.2010.15252.

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32

Triaswanto, Fanuel, Ultha Rifqy Riswanta, Naufal Urfi Dhiya Ulhaq, Muhammad Luqman Fathoni, and RCH Soesilohadi. "Pola aktivitas harian Leptocorisa oratorius Fabricius (Hemiptera: Alydidae) pada berbagai ketinggian tempat di Daerah Istimewa Yogyakarta." Jurnal Entomologi Indonesia 16, no. 2 (October 5, 2019): 103. http://dx.doi.org/10.5994/jei.16.2.103.

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Walang sangit (Leptocorisa oratorius Fabricus) merupakan merupakan salah satu hama penting tanaman padi. Informasi mengenai pola aktivitas harian L. oratorius masih belum banyak diketahui. Penelitian ini bertujuan untuk mengetahui periodisititas harian dan pola aktivitas harian dari L. oratorius pada berbagai ketinggian di wilayah Daerah Istimewa Yogyakarta. Penelitian dilakukan dengan melakukan penghitungan individu L. oratorius di sawah yang memasuki fase generatif setiap jam dari pukul 06.00 sampai pukul 18.00 WIB di ketinggian 40 m dpl (Trirenggo, Bantul), 130 m dpl (Seyegan dan Mlati, Sleman), dan 340 m dpl (Ngemplak dan Pakem, Sleman). Pengukuran parameter lingkungan (suhu udara, intensitas cahaya, dan kelembaban udara) juga dilakukan di setiap sawah yang diobservasi setiap 15 menit untuk rentang waktu yang sama. Analisis data dilakukan untuk memperoleh hubungan antara parameter lingkungan dan keberadaan L. oratorius. Analisis data menggunakan korelasi. Secara umum, periodisitas harian L. oratorius memiliki dua puncak (pukul 06.00–07.00 WIB dan 16.00–17.00 WIB) dan lembah (pukul 11.00–12.00 WIB). Aktivitas yang umum ditemukan sepanjang waktu adalah makan dan berkunjung. Aktivitas kawin terjadi pada pagi hari dan aktivitas berteduh pada siang hari. Faktor suhu udara dan intensitas cahaya menunjukkan korelasi negatif, sedangkan faktor kelembaban menunjukkan korelasi positif. Pada ketinggian yang berbeda, tidak ditemukan perbedaan signifikan, baik periodisitas, pola aktivitas, dan parameter lingkungan, kecuali pada ekosistem sawah pada ketinggian 130 m dpl.

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Ma, De-Ling, Yoshito Suzuki, Hiroaki Takeuchi, Tomonari Watanabe, and Mami Ishizaki. "Ovicidal and ovipositional effects of neem (Azadirachta indicaA. Juss.) extracts on rice bug,Leptocorisa chinensis(Dallas)." International Journal of Pest Management 51, no. 4 (October 2005): 265–71. http://dx.doi.org/10.1080/09670870500270638.

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Ishizaki, Mami, Tetsuya Yasuda, and Tomonari Watanabe. "Feeding Behavior Patterns of Leptocorisa chinensis (Hemiptera: Alydidae) Nymphs on Host and Nonhost Plants." Annals of the Entomological Society of America 103, no. 4 (July 1, 2010): 585–91. http://dx.doi.org/10.1603/an10022.

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Reji, G., and S. Chander. "A degree-day simulation model for the population dynamics of the rice bug,Leptocorisa acuta(Thunb.)." Journal of Applied Entomology 132, no. 8 (September 2008): 646–53. http://dx.doi.org/10.1111/j.1439-0418.2007.01178.x.

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Jahn, Gary C., Isaias Domingo, M. Liberty, P. Almazan, and Jocelyn Pacia. "Effect of Rice Bug Leptocorisa oratorius (Hemiptera: Alydidae) on Rice Yield, Grain Quality, and Seed Viability." Journal of Economic Entomology 97, no. 6 (December 1, 2004): 1923–27. http://dx.doi.org/10.1093/jee/97.6.1923.

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Telaumbanua, Mareli, Ristanti Ristanti1, Elhamida Rezkia Amien, Agus Haryanto, and Winda Rahmawati. "TEKNIK PENGENDALIAN SERANGGA HAMA WALANG SANGIT (Leptocorisa oratorius) MELALUI PENYEMPROTAN LARUTAN BEUVERIA BASSIANA UNTUK TANAMAN PADI." Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) 9, no. 4 (December 22, 2020): 374. http://dx.doi.org/10.23960/jtep-l.v9i4.374-382.

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Serangga hama walang sangit merupakan salah satu faktor kegagalan dalam budidaya tanaman padi. Untuk mencegah peningkatan serangan pada tanaman padi, dibutuhkan instektisida alami yang mampu meningkatkan mortalitas walang sangit. Tujuan penelitian ini adalah meningkatkan mortalitas serangga hama walang sangit melalui pemberian agen hayati larutan Beuveria bassiana pada berbagai taraf konsentrasi. Larutan Beuveria bassiana disempotkan pada walang sangit di dalam sungkup jaring pada rumpun tanaman padi. Dosis yang diberikan antara ekstrak beuveria bassiana dengan air menggunakan perbandingan 2 ml/L, 5 ml/L, 8 ml/L, dan 10 ml/L. Hasil penelitian menunjukkan dosis terbaik untuk pengendalian hama walang sangit pada tanaman padi adalah 10 ml larutan beuveria bassiana per liter air. Hal ini ditunjukkan dari mortalitas walang sangit tertinggi yaitu 76,92 % selama 12 hari pengamatan. Pada dosis 10ml/L telah menunjukkan perubahan fisik pada serangga hama yang telah mati. Cendawan beuveria bassiana muncul di seluruh jaringan tubuh walang sangit yang telah mati. Pertumbuhan cendawan mulai tampak menyelimuti serangga hama yaitu hari ke 8 menggunakan dosis 8 ml/L air dan 10 ml/L air. Di samping itu, dosis yang menunjukkan mortalitas terendah pada walang sangit adalah 2 ml larutan beuveria bassiana per liter air. Mortalitas walang sangit pada dosis ini adalah 28,57 % selama 12 hari pengamatan. Kata Kunci: agen hayati, larutan beuveria bassiana, pengendalian hama, serangga hama walang sangit, tanaman padi

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Jha, Sudeepa Kumari, and Rabindra Prasad. "Relative resistance of aromatic rice against Gundhi bug, Leptocorisa acuta (Thunberg) under agro-climatic condition of Jharkhand." International Journal of Chemical Studies 8, no. 3 (May 1, 2020): 505–6. http://dx.doi.org/10.22271/chemi.2020.v8.i3f.9261.

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HERLINDA, SITI, SRI INDAH MULYATI, and SUWANDI SUWANDI. "Selection of Isolates of Entomopathogenic Fungi and the Bioefficacy of Their Liquid Production against Leptocorisa oratorius Nymphs." Microbiology Indonesia 2, no. 3 (December 2008): 141–46. http://dx.doi.org/10.5454/mi.2.2.9.

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Maulina, Fri, Novri Nelly, Hidrayani Hidrayani, and Hasmiandy Hamid. "The Species of Rice Bug (Leptocorisa oratorius Fabricius) Egg Parasitoids in Rice Field in West Sumatera, Indonesia." Journal of Applied Agricultural Science and Technology 4, no. 1 (February 28, 2020): 76–85. http://dx.doi.org/10.32530/jaast.v4i1.150.

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The species of egg parasitoid in rice bug is necessary to know to be used as biological agent in the field. The research aimed to determine spesies of parasitoid, diversity index, parasitization level and parasitoid mortality which found in rice bug eggs in rice fields in West Sumatra. Purposive random sampling was used in this research for determining the sampling locations. Collecting eggs sampling was conducted for 1 km along transect line in sampling location. The collected eggs of 12 sampling locations then observed and identified in Laboratory of Insect Bioecology, Faculty of Agriculture, Andalas University. The result showed that the kind of egg parasitoid found in the field were Hadronotus leptocorisae and Ooencyrtus malayensis with each parasitization level were 22.3 ± 11.1 % and 4.2 ± 5.3 %, each the mortality were 57.8 ± 26.4% and 30.6 ± 37%, the diversity of egg parasitoid was low with the index 0.3858 Based on Shannon-Wienner.

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GUNAWARDENA, NEELAKANTHI E. "SEASONAL CHANGES IN THE CHEMICAL COMPOSITION OF THE DEFENSIVE SECRETION OF THE RICE PEST LEPTOCORISA ORATORIUS (HEMIPTERA:COREIDAE)." Journal of the National Science Foundation of Sri Lanka 22, no. 3 (September 30, 1994): 239. http://dx.doi.org/10.4038/jnsfsr.v22i3.8125.

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Maulina, Fri, and Muflihayati Muflihayati. "DISTRIBUSI PARASITOID Ooencyrtus malayensis DI PERTANAMAN PADI SUMATERA BARAT: KANDIDAT PENGENDALI HAYATI WALANG SANGIT (Leptocorisa oratorius F.)." LUMBUNG 19, no. 2 (August 31, 2020): 58–66. http://dx.doi.org/10.32530/lumbung.v19i2.206.

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Pemberdayaan musuh alami hama seperti parasitoid Ooencyrtus malayensis sebagai pengendali hayati walang sangit dapat meminimalisir penggunaan insektisida kimia dan memiliki nilai positif yaitu mengendalikan hama pada stadia awal perkembangannya. Tujuan penelitian adalah: menentukan distribusi populasi parasitoid pada topografi Sumatera Barat yang berbeda, dan menentukan tingkat parasitisasi, dominansi dan mortalitas parasitoid tersebut. Pengambilan sampel telur walang sangit terparasit di lokasi padi sawah dengan metode stratifield sampling pada tiga ketinggian tempat yaitu: Sungai Sapih Kota Padang, Rendah (20 m dpl ), Tanjung Pati Kabupaten Limapuluh Kota, Sedang (500 m dpl), dan Kubang Putih Kabupaten Agam, Tinggi (975 m dpl). Sampel telur diamati di laboratorium untuk mengetahui telur yang terparasit oleh O. malayensis dan selanjutnya data dianalisis. Hasil penelitian membuktikan bahwa distribusi parasitoid O. malayensis lebih dominan pada lokasi lokasi dataran rendah selanjutnya dataran sedang sedangkan pada dataran tinggi tidak ditemukan. Tingkat parasitisasi pada dataran rendah dan tinggi adalah 13% dan 6%. Sedangkan nilai mortalitas parasitoid O. malayensis pada dataran rendah dan tinggi adalah 17 % dan 33 %. Dari penemuan ini disimpulkan bahwa parasitoid O. malayensis menyukai lokasi dengan ketinggian rendah dri permukaan laut dan dapat memparasitisasi telur walang sangit dengan tingkat serangan yang cukup tinggi.

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Nilamudeen, Malini, and K. Sudharma. "Single dose screening assay of nine isolates of entomopathogenic fungi against rice gundhi bug, Leptocorisa acuta (Thunb)." Journal of Entomological Research 45, no. 1 (2021): 47–51. http://dx.doi.org/10.5958/0974-4576.2021.00007.4.

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Lham, Hari Andi, Rully Syahta, Finky Anggara, and Jamaluddin Jamaluddin. "Alat Perangkap Hama Serangga Padi Sawah Menggunakan Cahaya dari Tenaga Surya." Journal of Applied Agricultural Science and Technology 2, no. 1 (February 1, 2018): 11–19. http://dx.doi.org/10.32530/jaast.v2i1.13.

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Untuk mengendalikan hama serangga yang ramah lingkungan, dirancang sebuah alat perangkap hama serangga pada padi sawah dengan menggunakan cahaya dari tenaga surya dengan sumber listrik dari tenaga surya. Alat ini menggunakan panel surya 10 Wp - 12 V dengan baterai 12 V - 7 Ah. Alat ini menggunakan lampu LED 5 watt dan dapat bertahan selama 14 jam. Alat ini bekerja secara otomatis karena menggunakan sensor LDR (cahaya) untuk menghidupkan lampu secara otomatis. Alat memanfaatkan keterkaitan hama serangga yang tertarik dengan cahaya. Secara alami hama serangga mudah tertarik dengan cahaya. Berdasarkan pengujian yang dilakukan di persawahan warga di Kandang Lamo, Kec. Harau, hama serangga yang tertangkap adalah walang sangit (leptocorica acuta), kepinding tanah (scotinophora coarctata), kepik hijau (nezara viridula), penggerek batang padi putih (scripophaga innotata) dan belalang (caelifera).

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Listianti, Nafa Novika, Wahyu Winarno, and Iqbal Erdiansyah. "Pemanfaatan Ektrak Daun Pepaya (Carica papaya L.) Sebagai Insektisida Nabati Pengendali Walang Sangit (Leptocorisa acuta) Pada Tanaman Padi." Agriprima, Journal of Applied Agricultural Sciences 3, no. 1 (March 30, 2019): 81–85. http://dx.doi.org/10.25047/agriprima.v3i1.142.

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Keberadaan hama walang sangit (Leptocorisa acuta) sebagai hama utama tanaman padi menyebabkan produksi padi rendah. Pengendalian walang sangit yang biasanya menggunakan insektisida sintetik dinilai kurang efektif karena hama telah resisten terhadap insektisida sintetik. Upaya pengendalian walang sangit dapat dilakukan dengan memanfaatkan bahan yang berasal dari organ tanaman. Penelitian ini bertujuan untuk menekan aktivitas serangan hama walang sangit. Jalan Parangtritis, Kelurahan Antirogo, Kecamatan Sumbersari, Jember merupakan tempat pelaksanaan penelitian. Penelitian ini disusun dengan RAK (Rancangan Acak Kelompok) Non Faktorial, menggunakan tiga perlakuan dan diulang sembilan kali. Perlakuan meliputi P0 (insektisida sintetik bahan aktif deltametrin 1 ml/L), P1 (konsentrasi ekstrak daun pepaya 55%), dan P2 (konsentrasi ekstrak daun pepaya 75 %). Hasil penelitian menunjukkan bahwa perlakuan P2 (konsentrasi 75 % ekstrak daun pepaya) mampu menekan intensitas serangan walang sangit pada pengamatan minggu ke 3 dan ke 4 dengan rata-rata intensitas serangan 26,31 % sampai 23,17 %. Selain itu, pada perlakuan P2 (75 % ekstrak daun pepaya) berpengaruh pada persentase bulir bernas per sampel dengan rerata 38,09 % dan berat padi per sampel dengan rerata 7,11 g.

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Trizelia, Trizelia, Teguh Santoso, Soemartono Sosromarsono, Aunu Rauf, and Lisdar I. Sudirman. "Keragaman Genetik berbagai Isolat Beauveria bassiana (Bals.) Vuill. (Deuteromycotina: Hyphomycetes) dan Virulensinya terhadap Crocidolomia pavonana." Jurnal Natur Indonesia 14, no. 3 (January 19, 2013): 176. http://dx.doi.org/10.31258/jnat.14.3.176-183.

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The objectives of the research were to study the genetic variability of various Beauveria bassiana (Bals.) Vuill. isolates andvirulence to Crocidolomia pavonana. Thirteen isolates of B. bassiana were isolated from Nilaparvata lugens (Stål),Leptocorisa oratorius (F.), Thrips sp., Hypothenemus hampei (Ferr.), Crocidolomia pavonana (F.), Spodoptera litura (F.),Chrysodeixis chalcites (Esp.), and Riptortus linearis (L.) pests from different geographical locations in Indonesia. Fourteendifferent random primers were used to amplify DNA. Clustering of isolates were obtained using Unweight Pair GroupMethod Avarage (UPGMA). The results showed that only OPA08 primer generated more polymorphic DNA fragments.Result of clustering analysis showed that B. bassiana isolates forms two groups having genetic similarity equal to 55%.Clustering of isolates does not correlate to host type nor geographic origin. Mortality of second instar C. pavonana larvaewas dependent on the fungal isolates. At a concentration of 108 conidia/ml, isolate Bb-La2 had the highest virulence whichcaused 65% mortality of 2nd instar larvae. Isolates of B. bassiana is virulent against C. pavonana larvae present in the samegenotype group.

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As’ad, Miftah Farid, FNU Kaidi, and Mochamad Syarief. "Status Resistensi Walang Sangit (Leptocorisa acuta F.) Terhadap Insektisida Sintetik dan Kepekaannya Terhadap Beauveria bassiana Pada Tanaman Padi." Agriprima, Journal of Applied Agricultural Sciences 2, no. 1 (March 24, 2018): 79–86. http://dx.doi.org/10.25047/agriprima.v2i1.80.

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Walang sangit merupakan hama utama tanaman padi. Penanggulangan hama ini sering dilakukan dengan Penggunaan insektisida sintetik secara intensif yang berpotensi memacu resistensi, sehingga deteksi resistensi secara dini perlu dilakukan agar status resistensi hama dapat diketahui lebih awal yang bermanfaat dalam menyusun strategi pengendalian hama resisten. Penelitian ini dilakukan di Desa Antirogo, Jember yang menggunakan insektisida sintetik berbahan aktif Fipronil dan di Desa Lombok Kulon, Bondowoso yang menggunakan musuh alami Beauveria bassiana. Penelitian ini bertujuan untuk mempelajari status resistensi walang sangit terhadap Fipronil, kepekaannya terhadap B. bassiana, perkembangan populasi dan intensitas serangan. Data populasi dan intensitas serangan ditampilkan dalam bentuk box-plot. Nisbah resistensi dianalisis dengan Regresi probit. Perbedaan populasi dan intensitas serangan kedua lokasi menggunakan uji Mann-Whitney. Hubungan antara populasi dan intensitas serangan menggunakan korelasi Spearman. Hasil penelitian adalah walang sangit Antirogo telah resisten terhadap insektisida berbahan aktif Fipronil. dengan Nisbah Resistensi 9,33. Walang sangit Antirogo peka terhadap B. bassiana dengan Nisbah Resistensi 0,28. Intensitas serangan walang sangit Antirogo pada 9 MST dan 10 MST adalah 9,38 ± 15,53 % dan 5,83 ± 11,06%. Intensitas serangan walang sangit Lombok Kulon pada 9 MST dan 10 MST adalah 2,36 ± 5,85% dan 1,50 ± 5,37%. Populasi walang sangit Antirogo pada 9 dan 10 MST adalah 0,57 ± 0,94 dan 0,37 ± 0,66. Populasi walang sangit Lombok Kulon pada 9 dan 10 MST adalah 0,39 ± 0,53 dan 0,20 ± 0,40

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Ishizaki, Mami, Tetsuya Yasuda, and Tomonari Watanabe. "Effect of Plant Species on Survivorship and Duration of Nymphal Stage in Leptocorisa chinensis (Hemiptera: Alydidae)." Annals of the Entomological Society of America 101, no. 3 (May 1, 2008): 558–64. http://dx.doi.org/10.1603/0013-8746(2008)101[558:eopsos]2.0.co;2.

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Maulina, Fri, Novri Nelly, Hidrayani Hidrayani, and Hasmiandy Hamid. "Parasitizations Levels and Temperature Tolerance of Rice Bug (Leptocorisa oratorius Fabricius) Egg Parasitoids: Mass Rearing for Biological Control." International Journal on Advanced Science, Engineering and Information Technology 8, no. 3 (June 8, 2018): 714. http://dx.doi.org/10.18517/ijaseit.8.3.1241.

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50

Gupta, Krishna, and Ashwani Kumar. "Field Efficacy of Certain Insecticides against Rice Gundhi Bug [Leptocorisa acuta (Thonberg)] Under Agro-Climatic Condition of Allahabad." International Journal of Current Microbiology and Applied Sciences 6, no. 8 (August 10, 2017): 343–45. http://dx.doi.org/10.20546/ijcmas.2017.608.045.

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