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Relevant bibliographies by topics / Ladybird beetle

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Academic literature on the topic 'Ladybird beetle'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 June 2025

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Journal articles on the topic "Ladybird beetle"

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Venegas, Pablo, Francisco Calderon, Daniel Riofrío, et al. "Automatic ladybird beetle detection using deep-learning models." PLOS ONE 16, no. 6 (2021): e0253027. http://dx.doi.org/10.1371/journal.pone.0253027.

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Fast and accurate taxonomic identification of invasive trans-located ladybird beetle species is essential to prevent significant impacts on biological communities, ecosystem functions, and agricultural business economics. Therefore, in this work we propose a two-step automatic detector for ladybird beetles in random environment images as the first stage towards an automated classification system. First, an image processing module composed of a saliency map representation, simple linear iterative clustering superpixels segmentation, and active contour methods allowed us to generate bounding boxes with possible ladybird beetles locations within an image. Subsequently, a deep convolutional neural network-based classifier selects only the bounding boxes with ladybird beetles as the final output. This method was validated on a 2, 300 ladybird beetle image data set from Ecuador and Colombia obtained from the iNaturalist project. The proposed approach achieved an accuracy score of 92% and an area under the receiver operating characteristic curve of 0.977 for the bounding box generation and classification tasks. These successful results enable the proposed detector as a valuable tool for helping specialists in the ladybird beetle detection problem.

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Kovalenko, Tatyana K., and Elena N. Lastushkina. "Potato resistance to the potato ladybird beetles Henosepilachna vigintioctomaculata Motsch. (Coleoptera, Coccinelidae) – assessment data." Far Eastern Agrarian Herald, no. 4 (2020): 36–40. https://doi.org/10.22450/1999-6837-2020-4-36-40.

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The potato ladybird beetle is one of the most dangerous potato pests. The purpose of this work is to assess potato varieties as to resistance to phytophage in the climates of the Primorsky Region. The objects of the study were the potato ladybird beetles Henosepilachna vigintioctomaculata Motsch., potato varieties of various maturity groups. Experimental work was carried out in the years 2015-2019 under laboratory and field conditions according to the methods of the research into potato resistance to pests. As the result of the research, varieties with a pronounced manifestation of antibiosis to potato ladybird beetle larvae were identified. Varietal resistance to colonization and damage caused by potato ladybird beetles was determined. There were significant differences in the pest population rate on the plants. According to the results of the assessment, the varieties Koroleva Anna, Impala, Rodriga, Pamyaty Rogachyova, Artemovets, Kazachok showed resistance to potato ladybird beetles. It was found that the varieties Yubilyar, Bellarosa, Latona, Bryansky Delikates were more preferable for the development of the pest and nonresistant to damage.

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Ermak, M. V., N. V. Matsishina, and P. V. Fisenko. "Phenology of the 28-spotted potato ladybird beetle <i>Henosepilachna vigintioctomaculata</i> in the south of the Russian Far East." Vegetable crops of Russia, no. 3 (June 23, 2022): 62–70. http://dx.doi.org/10.18619/2072-9146-2022-3-62-70.

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Relevance. The 28-spotted potato ladybird beetle, Henosepilachna vigintioctomaculata, causes severe damage to plants of the Solanaceae family in the south of the Russian Far East. Today the application of chemicals is the main method for protecting crops against the potato ladybird beetle. This leads not only to the eradication of the pest, but also to the pollution of agricultural ecosystems and the emergence of potato ladybird beetle populations that are resistant to pesticides. A study on the seasonal cycles of the development of the potato ladybird beetle may help to devise new methods for controlling this pest.Methods. We conducted laboratory experiments to study the developmental timing ofa potato ladybird beetlepopulation. The number of eggs was counted, and then the eggs were placed in Petri dishes. The number of emerged larvae was recorded on a daily basis. The hatched larvae were transferred to glass containers (hereafter rearing cages) in batches of 10. We recorded the dates of the transition from one immature developmental stage to another notingthe simultaneity of these transitions. At the onset of the pupal stage, the date was recorded and food was withdrawn from the rearing cages. Scientific observations were carried out on the emergence ofyoung beetles. Field research on the phenology of the potato ladybird beetle was conducted at afield site of 40 m2. The timing of the following events was recorded: the emergence of the adult beetles from diapause, the colonization of the potato field, the beginning and the end of oviposition, the emergence of the larvae and the pupae, the flight of the new insect generation.Results and conclusion. Our laboratory experiment on the immature developmental stages of the potato ladybird beetle revealed that the egg stage was 4-5 days in duration, the larval stage was 16-17 days and the pupal stage was 4-5 daysunder optimal conditions. We also observed deviations from the mean values, which could be conditioned by external factors. For instance, the duration of embryonic development depended either on humidity or on the time range of hatching from one egg mass. The observed deviations of the developmental timing of the larvae and the pupae were most probably due to the quantity and quality of the available food, and the presence of secondary metabolites and glycoalkaloids in it. The field research on thephenology of the potato ladybird beetle showed that there was only one generation in 2020, but two generations in 2021. After comparing climatic conditions in 2020 and 2021, we concluded that Henosepilachna vigintioctomaculata can produce two generations during dry and hot years.

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Bajracharya, Sushila, Prem Bahadur Budha, and Suraj Baral. "Feeding efficiency of Coccinella septempunctata Linnaeus and Propylea luteopustulata (Mulsant) against Mustard aphid Lipaphis erysimi (Kaltenbach)." Nepalese Journal of Zoology 7, no. 1 (2023): 1–6. http://dx.doi.org/10.3126/njz.v7i1.56304.

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Ladybird beetles are efficient natural predators of aphids, particularly the ladybird beetles are efficient natural predators of aphids, particularly the widespread mustard pest, Lipaphis erysimi. This study compared the feeding efficiency of two adult predator ladybird beetle species Coccinella septempunctata and Propylea luteopustulata against L. erysimi in an experimental set-up for forty-nine days from 29 December 2019 to 15 February 2020. Five replicates of each beetle species were supplied with 100 aphids daily and their feeding rate was counted. Negative binomial regression analysis of these predator beetles showed that C. septempunctata consumed a significantly high number of mustard aphid individuals (29.42 ± 1.33) than P. luteopustulata (23.20 ± 1.07) at room temperature and relative humidity. Temperature and relative humidity also influenced the feeding rate of these beetles. The feeding rate of P. luteopustulata against a mustard pest aphid is described for the first time. The findings of the study will be an important aspect in the biological control of pests in Nepalese agroecosystems.

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Patel, P. B., and M. K. Jena. "Population dynamics of sucking pests, natural enemies, and the incidence of yellow mosaic disease on Vigna radiata (L.) Wilczek in relation to weather factors." ENTOMON 49, no. 4 (2024): 553–56. https://doi.org/10.33307/entomon.v49i4.1346.

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The investigation on population dynamics of sucking pests, their natural enemies, and the per cent disease incidence (PDI) of mung bean yellow mosaic disease (YMD) on Vigna radiata was conducted. During the harvest of the crop, the population of Aphis craccivora, Empoasca kerri, ladybird beetle, and the PDI of YMD was the highest on the 17th Standard meteorolo gical week (SMW). In contrast, the population of Bemisia tabaci was at its peak on the 15th SMW. The minimum temperature had highly significant positive correlation with the population of A. craccivora, E. kerri, B. tabaci, ladybird beetle, and the PDI of YMD. Moreover, there was a significant positive correlation between wind velocity and the population of ladybird beetles. Furthermore, a significant positive correlation was found between the PDI of YMD and the population of B. tabaci.

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Vilcinskas, Andreas, Krishnendu Mukherjee, and Heiko Vogel. "Expansion of the antimicrobial peptide repertoire in the invasive ladybird Harmonia axyridis." Proceedings of the Royal Society B: Biological Sciences 280, no. 1750 (2013): 20122113. http://dx.doi.org/10.1098/rspb.2012.2113.

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The harlequin ladybird beetle Harmonia axyridis has emerged as a model species in invasion biology because of its strong resistance against pathogens and remarkable capacity to outcompete native ladybirds. The invasive success of the species may reflect its well-adapted immune system, a hypothesis we tested by analysing the transcriptome and characterizing the immune gene repertoire of untreated beetles and those challenged with bacteria and fungi. We found that most H. axyridis immunity-related genes were similar in diversity to their counterparts in the reference beetle Tribolium castaneum , but there was an unprecedented expansion among genes encoding antimicrobial peptides and proteins (AMPs). We identified more than 50 putative AMPs belonging to seven different gene families, and many of the corresponding genes were shown by quantitative real-time RT–PCR to be induced in the immune-stimulated beetles. AMPs with the highest induction ratio in the challenged beetles were shown to demonstrate broad and potent activity against Gram-negative bacteria and entomopathogenic fungi. The invasive success of H. axyridis can therefore be attributed at least in part to the greater efficiency of its immune system, particularly the expansion of AMP gene families and their induction in response to pathogens.

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Garbary, David J., Sarah Fraser, Carrie Ferguson, and Randolph F. Lauff. "Use of Eelgrass, Zostera marina, Wrack by Three Species of Ladybird Beetles (Coleoptera: Coccinellidae) in Prince Edward Island." Canadian Field-Naturalist 118, no. 2 (2004): 225. http://dx.doi.org/10.22621/cfn.v118i2.917.

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Large numbers of the introduced ladybird beetle, Coccinella septempunctata L., were present at Wood Islands and Green Point, Prince Edward Island, in wrack consisting primarily of Zostera marina L. (Eelgrass). The wrack occurred in a 0.5 to 1.0 m band parallel to the shore, and was from five to 25 cm thick. The other ladybirds, Propylea quatuordecimpunctata (L.), an introduced coccinellid also found in high numbers, and an individual of the native Hippodamia tredecimpunctata (Say) were found only at Wood Islands. At both sites the ladybird beetles occurred in the mid-intertidal zone along at least 100 m of shoreline, and were absent to rare on the terrestrial vegetation above the high tide mark. At four of the other eight sites surveyed, occasional individuals were present in the wrack, but they were no more abundant than could be observed on landward vegetation. Mean densities of C. septempunctata at the two primary sites were 52 m-2 (Green Point) and 410 m-2 (Wood Islands).

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Ermak, M. V., N. V. Matsishina, and P. V. Fisenko. "The 28-spotted potato ladybird beetle <i>Henosepilachna vigintioctomaculata</i> (Motsch.) in Primorsky kray: the history of the pest (review)." Vegetable crops of Russia, no. 5 (September 26, 2022): 94–97. http://dx.doi.org/10.18619/2072-9146-2022-5-94-97.

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The 28-spotted potato ladybird beetle is an endemicspecies of the Russian Far East. Nowadays the potato ladybird beetle is widespread across Primorsky and Khabarovsky kray, south Sakhalin, Kunashir Island, and in China, Japan, and India. This paper presents historical data on the dispersal of the potato ladybird beetle in Russia. The first records of the pest presence in the coastal area of Primorsky kray were made in 1929. In the 1950s and 1960s, the pest was observed to inhabit not only the forest steppe zone and the districts adjacent to the taiga in Primorsky kray, but also Khabarovsky kray, Amur oblast and Jewish autonomous oblast. The process of dispersal of the potato ladybird beetle can be divided in several stages: the formation of a new breeding ground, an increase in the size of the pest population, the dispersal of the pest. The range expansion of the potato ladybird beetle can be linked to two facts. First, the land area under potato cultivation increased and neared the breeding grounds of the pest. Secondly, thedietary preference of the phytophagous insect shifted to the new fodder plant. In addition, the development of transportation routes played an important role in the dispersal of the pest. Therefore, anthropogenic factors significantly affected the distribution of the potato ladybird beetle. These factors in combination with a high ecological plasticity of the pest allowed the phytophagous insect to spread across the whole area under potato cultivation in the south of the Russian Far East.

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Manimala, R. Naveena, Shashikala M., C. N. Rajarushi, et al. "Distribution and Abundance of Seven Spotted Ladybird Beetle (Coccinella septempunctata) Linnaeus in Different Cropping System at Pantnagar, Uttarakhand, India." UTTAR PRADESH JOURNAL OF ZOOLOGY 45, no. 17 (2024): 220–27. http://dx.doi.org/10.56557/upjoz/2024/v45i174364.

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The primary objective of this research is to provide insight into how abiotic factors affect the coccinellid beetle population in Pantnagar region, India. The current study was conducted at six distinct Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, regions between November 2020 and April 2021. Predatory coccinellid beetle C. septumpunctata, diversity was investigated in a variety of crops, including ornamental, vegetable, fruit, and field crops. Seasonal abundance of C. septumpunctata, in different crops revealed that during the 50th standard meteorological week (SMW), there were more coccinellids in mustard fields than in other field crops. This suggests that conditions were favourable for both predators and prey. Similar to this, during the 12th SMW, rose crops had a high population of coccinellids, and during the 15th SMW, coriander had the largest population of ladybird beetles (98) among vegetable crops. Guava had the largest population of ladybird beetles in fruit orchards (75). Correlation studies between the population of ladybird beetles and weather factors revealed that in crops like mustard, rose, guava, and coriander, where high numbers of coccinellids were observed, the climatic conditions favored the coccinellids, and the availability of prey species.

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Pal, Suprakash, Biwash Gurung, Ponnusamy Natarajan, and Partha Sarathi Medda. "New prey record of giant ladybird beetle Anisolemnia dilatata (Fabricius) (Coccinellidae: Coleoptera) feeding on Som Plant Aphid Aiceona sp." Journal of Threatened Taxa 15, no. 1 (2023): 22551–55. http://dx.doi.org/10.11609/jott.7450.15.1.22551-22555.

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This paper reports the occurrence of giant ladybird beetle Anisolemnia dilatata (Fabricius) (Coccinellidae: Coleoptera) predating upon the aphid, Aiceona sp. infesting the Som plants, Persea bombycina Kost. from Pundibari, Cooch Behar, West Bengal, India. This is a new prey record for the Giant ladybird beetle.

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Dissertations / Theses on the topic "Ladybird beetle"

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Wittaker, S. A. "The role of ladybird beetles in determining the abundance of cereal aphids." Thesis, University of East Anglia, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378908.

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Khan, Inamullah, University of Western Sydney, Faculty of Environmental Management and Agriculture, and Centre for Horticulture and Plant Sciences. "Aspects of the biology of the ladybird beetle Stethorus vagans (Blackburn) (Coleoptera: Coccinellidae)." THESIS_FEMA_HPS_Khan_I.xml, 2000. http://handle.uws.edu.au:8081/1959.7/779.

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This thesis reports laboratory and field investigations on the aspects of biology of the Stethorus vagans, an Australian ladybird that feeds on all stages of two-spotted mite, Tetranychus urticae. Aspects of the biology of S. vagans were studied in the laboratory at constant and fluctuating temperatures. They regularly fed on all stages of T. urticae and there was no significant difference in male and female longevity at different temperatures. For field studies potted French bean plants infested with T. urticae were exposed in the field. Adult S. vagans was found to consume a range of alternative prey if the primary host was not available, but only one of the alternative hosts had the potential to support reproduction. Time partitioning behaviour and prey consumption rates were assessed, and how S. vagans located their prey was investigated. S. vagans exhibited many of the attributes of an effective biological control agent such as high reproductive level, location of prey at low levels, reproduction at low densities, and ability to feed on alternative hosts. It is concluded that S. vagans has a number of characteristics likely make them useful as a natural enemy of T. urticae<br>Doctor of Philosophy (PhD)

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Khan, Inamullah. "Aspects of the biology of the ladybird beetle Stethorus vagans (Blackburn) (Coleoptera: Coccinellidae)." Thesis, View thesis, 2000. http://handle.uws.edu.au:8081/1959.7/779.

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This thesis reports laboratory and field investigations on the aspects of biology of the Stethorus vagans, an Australian ladybird that feeds on all stages of two-spotted mite, Tetranychus urticae. Aspects of the biology of S. vagans were studied in the laboratory at constant and fluctuating temperatures. They regularly fed on all stages of T. urticae and there was no significant difference in male and female longevity at different temperatures. For field studies potted French bean plants infested with T. urticae were exposed in the field. Adult S. vagans was found to consume a range of alternative prey if the primary host was not available, but only one of the alternative hosts had the potential to support reproduction. Time partitioning behaviour and prey consumption rates were assessed, and how S. vagans located their prey was investigated. S. vagans exhibited many of the attributes of an effective biological control agent such as high reproductive level, location of prey at low levels, reproduction at low densities, and ability to feed on alternative hosts. It is concluded that S. vagans has a number of characteristics likely make them useful as a natural enemy of T. urticae

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Khan, Inamullah. "Aspects of the biology of the ladybird beetle Stethorus vagans (Blackburn) (Coleoptera: Coccinellidae) /." View thesis, 2000. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20031103.132342/index.html.

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Davidson, Lynette Nicole. "Diets of Ladybird Beetles (Coleoptera: coccinellidae) in Utah Alfalfa Fields." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/139.

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Aphidophagous lady beetles rely on multiple sources of food in their environment. Alfalfa fields provide both aphids and many alternate foods, such as other arthropod prey, pollen, and fungi. Alfalfa fields (Medicago sativa L.) in Utah have low aphid densities, which may require lady beetles to consume alternative sources of food. Many methods can be used to determine these diets; frass analysis is used here to compare the diets of the introduced species Coccinella septempunctata L. with two native species, C. transversoguttata richardsoni Brown and Hippodamia convergens Guérin-Méneville, that occur in the Utah alfalfa habitat. In initial laboratory experiments to examine the feasibility of frass analysis, 48 hours at 20oC was sufficient time for adult lady beetles to pass prey cuticle through their guts. When consumed by these adults, pea aphids (Acyrthosiphon pisum [Harris]), alfalfa weevil larvae (Hypera postica [Gyllenhall]), and C. septempunctata larvae produced distinctive fragments in the frass. Such fragments could also be distinguished in frass collected in a field experiment in which aphid densities in plots of alfalfa were manipulated. Furthermore, additional consumed foods could be distinguished in the field experiment, including pollen, fungi, and other types of arthropods. Frass analysis demonstrated higher use of aphid prey by C. septempunctata adults collected from high versus low aphid density plots during the field experiment. Use of other types of prey, such as alfalfa weevil larvae, other arthropods, pollen and fungi, was similar between plots with high and low aphid densities. A field census was performed over two years to track the diets of the three species of lady beetles during the first crop of alfalfa, when two sources of prey in particular were present, aphids and alfalfa weevil larvae. Comparisons of diets revealed that the three species utilized different types of prey to similar degree during both years. In general, however, higher percentages of C. septempunctata adults were found to have consumed aphids and weevils during both years. Also, C. septempunctata was found to produce more frass and consume larger quantities of prey than either native species during the second year.

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BARBOSA, Paulo Roberto Ramos. "Desempenho de Tenuisvalvae notata (Mulsant) (Coleoptera: Coccinellidae) em diferentes presas e sua predação sobre Ferrisia virgata Cockerell (Hemiptera: Pseudococcidae)." Universidade Federal Rural de Pernambuco, 2012. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6012.

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Submitted by (edna.saturno@ufrpe.br) on 2016-11-28T16:17:54Z No. of bitstreams: 1 Paulo Roberto Ramos Barbosa.pdf: 763274 bytes, checksum: d1db37522ca460481761084d57a5e771 (MD5)<br>Made available in DSpace on 2016-11-28T16:17:54Z (GMT). No. of bitstreams: 1 Paulo Roberto Ramos Barbosa.pdf: 763274 bytes, checksum: d1db37522ca460481761084d57a5e771 (MD5) Previous issue date: 2012-07-02<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The lady beetles are an outstand predatory group among the natural enemies applied as biological control agents against arthropod pests. The lady beetle Tenuisvalvae notata (Mulsant), is a predator of Pseudococcidae and recently was found on cotton plants infested with Ferrisia virgata Cockerell (Hemiptera: Pseudococcidae) and on prickly pear infested with the false red cochineal Dactylopius opuntiae Cockerell (Hemiptera: Dactylopiidae), both in the Semiarid of Pernambuco. Thus, the performance of T. notata preying upon D. opuntiae, F. virgata and eggs of Anagasta kuehniella Zeller (Lepidoptera: Pyralidae) was studied. Further, the predation and reproduction when subjected to different condition of F. virgata availability and scarcity was also investigated. Although naturally collected on colonies of false red cocheneal from prickly pear, T. notata nor developed neither reproduced feeding exclusively on this pest. Likewise, eggs of A. kuehniella did not furnish development and reproduction of T. notata. On the other hand, F. virgata of different stages was successfully used as prey by larvae and adult of T. notata. Adult females of T. notata exhibited a type III functional response preying upon 1st-insar nymph of F. virgata and type II functional response when preying upon 3rd-instar and adults. Based on the functional response it is estimated predation rate of 157.8 1st-instar nymphs, 3.6 3rd-instar nymphs, and 2.2 females of F. virgata per day. Feeding on F. virgata 3rd-instar nymphs resulted in 1.23 eggs produced per each mealybug nymph consumed. However, female lady beetles subjected to prey scarcity exhibited switch on reproductive and survival output already with one day of feeding interval depicting a strong relationship of consumption, reproduction and survivorship between T. notata and F. virgata. The high performance of T. notata preying upon F. virgata and her functional response, in addition the balance of reproduction and survival showed when subjected to prey scarcity, portray T. notata as a feasible predator to control of F. virgata.<br>Os coccinelídeos predadores se destacam como um dos mais importantes grupos de inimigos naturais empregados no controle biológico de artrópodes pragas. A joaninha Tenuisvalvae notata (Mulsant), espécie nativa da América do sul e predadora de Pseudococcidae, foi recentemente constatada no Semiárido de Pernambuco associada a plantas de algodão infestadas com a cochonilha de listra, Ferrisia virgata Cockerell (Hemiptera: Pseudococcidae), e em palma forrageira infestada com a falsa cochonilha do carmim, Dactylopius opuntiae Cockerell (Hemiptera: Dactylopiidae). Assim, este trabalho avaliou o desempenho de T. notata sobre D. opuntiae, F. virgata e em ovos de Anagasta kuehniella Zeller (Lepidoptera: Pyralidae), bem como determinou seu potencial de predação e reprodução em diferentes condições de disponibilidade da cochonilha F. virgata. Mesmo sendo coletada em colônias da falsa cochonilha do carmim, T. notata não se desenvolveu e nem reproduziu ao predar exclusivamente esta cochonilha. Da mesma forma, ovos de A. kuehniella não foram adequados como alimento para T. notata. Por outro lado, F. virgata em diferentes estágios de desenvolvimento mostrou-se adequada como presa de T. notata, sendo consumida tanto por larvas quanto por adultos desta joaninha. Fêmeas de T. notata exibiram resposta funcional tipo III predando F. virgata de primeiro instar, e tipo II para ninfas de terceiro instar e fêmeas adultas apresentando um consumo estimado de 157,8 ninfas neonatas, 3,6 ninfas de terceiro instar ou 2,2 fêmeas adultas de F. virgata por dia. A alimentação diária em ninfas de terceiro instar de F. virgata resulta na média de 1,23 ovos produzidos para cada ninfa da cochonilha consumida. No entanto, quando as joaninhas são submetidas a diferentes intervalos de oferta de presa, observa-se influência na produção de ovos e sobrevivência já com um dia de intervalo de alimentação, caracterizando uma estreita relação de consumo, reprodução e sobrevivência para a associação T. notata e F. virgata. O desempenho de T. notata predando F. virgata e sua resposta funcional, somado ao balanço reprodutivo e sobrevivência apresentados sob condição de escassez desta presa, demonstra que T. notata é um predador em potencial para o controle de F. virgata.

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Puech, Camille. "Hétérogénéité des pratiques agricoles biologiques et conventionnelles dans les paysages bretons : effets sur les communautés d'insectes auxiliaires à différentes échelles." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S117/document.

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En réponse aux pertes de biodiversité et à une insécurité alimentaire croissante, l’agriculture moderne doit se tourner vers une gestion plus durable des paysages agricoles. L’Agriculture Biologique (AB) est considérée comme une solution prometteuse à ces enjeux. En effet, ses pratiques agricoles étant globalement plus favorables aux ennemis naturels de ravageurs que celles de l’Agriculture Conventionnelle (AC), elle pourrait permettre de remplacer l'utilisation des pesticides par celle du contrôle biologique. Cependant, les études évaluant ces effets restent contradictoires, probablement car elles ne tiennent pas compte de la diversité des pratiques réalisées en AB et en AC. A plus large échelle, les pratiques ont par ailleurs rarement été considérées dans la description de l’hétérogénéité paysagère, bien que la nature et l’organisation spatiale de la matrice agricole soit susceptible d’affecter les espèces qui y vivent. L’objectif de ce travail de thèse est d’évaluer les effets de la diversité et de l’organisation spatiale des pratiques en AB et en AC sur les insectes auxiliaires, à l’échelle de la parcelle et du paysage. Un travail de terrain a été réalisé en 2012 et 2013 en Ille et Vilaine. Quarante paires de parcelles de blé d’hiver en AB et en AC ont été sélectionnées, réparties le long d’un gradient paysager de surfaces en AB. Dans chaque parcelle, les communautés d'ennemis naturels de pucerons (coccinelles, carabes, parasitoïdes) ont été échantillonnées. Des enquêtes ont permis de caractériser les pratiques agricoles réalisées par les agriculteurs dans les parcelles suivies et dans leur environnement paysager. Nous avons mis en évidence l’existence d’une large diversité de pratiques agricoles dans les systèmes en AB et en AC. A l’échelle parcellaire, les effets des pratiques sur la diversité des insectes auxiliaires sont forts, les systèmes en AB leur étant globalement plus favorables. Considérer un niveau plus fin de description des pratiques nous a permis d’identifier celles qui affectent réellement les insectes et de montrer qu’il est possible de favoriser leur présence, quel que soit le mode de production. A l’échelle du paysage, nous n’avons mis en évidence aucun effet de l’étendue et de l’organisation de l’AB sur les ennemis naturels. Une description plus fine des pratiques nous a malgré tout permis de souligner l’importance de certaines stratégies de pratiques, à certaines échelles. A partir de ces résultats, nous proposons des pistes pour l’aménagement des paysages agricoles. Les problèmes méthodologiques liés à la description des pratiques agricoles à l’échelle du paysage sont également discutés<br>Due to the loss of biodiversity and increasing food insecurity, modern agriculture must evolve toward a more sustainable management of agricultural landscapes. Organic Farming (OF) is considered as a promising solution to meet this challenge. Organic practices are indeed generally more favorable to pest natural enemies than Conventional Farming (CF), suggesting that pesticides could be replaced by biological control. However, studies evaluating these effects are contradictory, probably because they do not consider the diversity of practices implemented in OF and CF. On a broader scale, practices have rarely been considered in the description of landscape heterogeneity, although the nature and configuration of farmland must affect species. The target of this PhD work is to evaluate the effects of the diversity and spatial organization of organic and conventional farming practices on insect natural enemies, at field and landscape scales. A fieldwork was conducted in 2012 and 2013 in Brittany. Forty pairs of organic and conventional winter wheat fields were selected, distributed along a landscape gradient of OF area. In each field, aphid natural enemies (ladybirds, carabid beetles, parasitoids) were sampled. We interviewed farmers to characterize farming practices implemented in fields and their surrounding landscape. We observed a wide diversity of farming practices in OF and CF. At field scale, effects of practices on the diversity of natural enemies were strong, OF being overall more favorable. Considering a finer description of practices allowed us identifying those really affecting insects, and showing they can be enhanced regardless of the farming type. At landscape scale, we found no effect of the OF area and configuration on natural enemies. With a more detailed description of practices, we however highlighted the importance of some farming strategies, at some scales. Based on these results, we open up avenues to manage agricultural landscapes. Methodological issues related to the description of farming practices on large areas are also discussed

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Giorgi, José Adriano. "Systematics of ladybird beetles (Ooleoptera: Coccinellidae)." 2009. http://purl.galileo.usg.edu/uga%5Fetd/giorgi%5Fjose%5Fa%5F200912%5Fphd.

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Books on the topic "Ladybird beetle"

1

Moriarty, Sarah. Ladybird beetles. Urban Spaces Scheme, 1987.

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Scheme, Urban Spaces. Ladybird beetles. Urban Spaces Scheme, 1985.

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Hodek, I., H. F. van Emden, and A. Honěk, eds. Ecology and Behaviour of the Ladybird Beetles (Coccinellidae). John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118223208.

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(Alois), Honěk A., ed. Ecology and behaviour of the ladybird beetles (Coccinellidae). Wiley, 2012.

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Whittaker, S. A. The role of ladybird beetles in determining the abundance of cereal aphids. University ofEast Anglia, 1987.

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Slipinski, Adam. Australian Ladybird Beetles (Coleoptera: Coccinellidae). CSIRO Publishing, 2013. http://dx.doi.org/10.1071/9780643109919.

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This book, by Australia's ladybird beetle specialist, Dr Adam Slipinski, illustrates Australia's diverse and fascinating ladybird beetle fauna — the commoner spotted species and the many others that are striped, glossy, and even very hairy. Most are predatory, but some are leaf feeders. This book reviews all 57 currently recognised genera of Australian Coccinellidae, recognising 260 valid described species, and including some genera and species newly described here. All genera are diagnosed, described and illustrated and a key to their identification is provided. Larvae of 30 species are described, illustrated and keyed. Sets of colour and black and white plates display these often beautifully colourful beetles, and their key features. The book is a must for all people interested in Australia's beetle fauna, in biocontrol and in natural resource management. This book was originally published in hardback by Australian Biological Resources Study (ABRS) in 2007 and is now available in a digital format.

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Weezag. Garden Paper: Dabbing Ladybird Beetle Ladybug Book. Independently Published, 2019.

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Weezag. Story Paper: Dabbing Ladybird Beetle Ladybug Book. Independently Published, 2019.

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Weezag. Recipe Paper: Dabbing Ladybird Beetle Ladybug Book. Independently Published, 2019.

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Weezag. Isometric Paper: Dabbing Ladybird Beetle Ladybug Book. Independently Published, 2019.

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Book chapters on the topic "Ladybird beetle"

1

Ueno, Hideki, Naoyuki Fujiyama, Kiyoshi Irie, Yuji Sato, and Haruo Katakura. "Genetic basis for established and novel host plant use in a herbivorous ladybird beetle, Epilachna vigintioctomaculata." In Proceedings of the 10th International Symposium on Insect-Plant Relationships. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-1890-5_31.

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Vega, Mateo, Diego S. Benítez, Noel Pérez, Daniel Riofrío, Giovani Ramón, and Diego Cisneros-Heredia. "Weighted Hausdorff Distance Loss as a Function of Different Metrics in Convolutional Neural Networks for Ladybird Beetle Detection." In Applications of Computational Intelligence. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91308-3_5.

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Miller, Laura T., Lionel Stange, Charles MacVean, et al. "Ladybird Beetles (Coccinellidae: Coleoptera)." In Encyclopedia of Entomology. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1944.

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Kumar, Bhupendra, and Omkar. "Ladybird Beetles (Coleoptera: Coccinellidae)." In Insect Predators in Pest Management. CRC Press, 2023. http://dx.doi.org/10.1201/9781003370864-8.

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Heepe, Lars, Constanze Grohmann, and Stanislav N. Gorb. "Visualization of the Number of Tarsal Adhesive Setae Used During Normal and Ceiling Walk in a Ladybird Beetle: A Case Study." In Biologically-Inspired Systems. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-74144-4_8.

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Ceryngier, Piotr, Helen E. Roy, and Remy L. Poland. "Natural Enemies of Ladybird Beetles." In Ecology and Behaviour of the Ladybird Beetles (Coccinellidae). John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118223208.ch8.

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Nedvěd, Oldrich, and Ivo Kovář. "Appendix: List of Genera in Tribes and Subfamilies." In Ecology and Behaviour of the Ladybird Beetles (Coccinellidae). John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118223208.app1.

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Nedvěd, Oldrich, and Ivo Kovář. "Phylogeny and Classification." In Ecology and Behaviour of the Ladybird Beetles (Coccinellidae). John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118223208.ch1.

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Michaud, J. P., and James D. Harwood. "Quantifying the Impact of Coccinellids on their Prey." In Ecology and Behaviour of the Ladybird Beetles (Coccinellidae). John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118223208.ch10.

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Michaud, J. P. "Coccinellids in Biological Control." In Ecology and Behaviour of the Ladybird Beetles (Coccinellidae). John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118223208.ch11.

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Conference papers on the topic "Ladybird beetle"

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Saito, Kazuya, and Yoji Okabe. "Elastic Wing Deployments in Beetles and Their Folding Mechanisms." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46559.

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Foldable hindwings in beetles are one of the ultimate deployable structures. They have sufficient strength and stiffness to tolerate 20–1000 beats per second in the flight position, although they can be folded and unfolded nearly instantly depending on the situation. This study focuses on a group of beetles that have unfolding-stable-type wings and aims to reveal their wing-folding/unfolding mechanisms. These beetles use their wing elasticity for deployment and can therefore quickly take off. First, on the basis of the reports of entomologists, the authors describe the factors related to the actuation of insect wing folding and unfolding. Then, the detailed motions involved in take-off and wing storing in ladybird beetles and rove beetles are observed by a high-speed camera. The analysis of these movies reveals the detailed processes of wing-unfolding and folding in these two species. Intrinsic elasticity plays a major role in wing development in both species. In the case of wing storing, a ladybird beetle folds its hindwings into a symmetric pattern using a simple up–down movement of the abdomen, whereas rove beetles also use their abdomens for wing-folding, but their movements are more complex, and the crease patterns are asymmetric. Finally, the characteristics of each wing-folding mechanism are summarized and the potential for engineering applications are discussed. Wing-folding/unfolding mechanisms in these insects have various unique capabilities which will provide new possibilities for designing deployable structures.

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Song, Zelai, Yichen Wang, Wen Li, et al. "Bionic deployable wing design based on Asian ladybird beetle." In 2021 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO). IEEE, 2021. http://dx.doi.org/10.1109/3m-nano49087.2021.9599793.

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Gorb, E., N. Hosoda, and S. Gorb. "Nano-Porous Substrates Reduce Beetle Attachment Force." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59173.

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Traction experiments with the seven-spotted ladybird beetles Coccinella septempunctata (L.) (Coleoptera, Coccinellidae) were carried out to study the influence of surface structure on insect attachment. Force measurements were performed with tethered walking insects using a load cell force transducer. For each beetle, forces were measured on five different substrates: (1) smooth glass plate; (2) smooth solid Al2O3 (sapphire) disc; (3 – 5) porous Al2O3 discs (anodiscs, back side) with the same pore diameter (220 – 235 nm), but different porosity (28, 42 and 51%). Males (N = 10) and females (N = 10) were used in experiments (10 single runs on each surface). Additionally, inversion tests were performed after each traction force measurement. The force ranged from 0.368 to 10.370 mN in males and from 0.514 to 6.262 mN in females. In both sexes, the highest force values were obtained on the smooth glass and sapphire surfaces, where males generated considerably higher forces compared to females. On all three porous substrates, forces were significantly reduced in both males and females, and the only difference for surfaces was obtained between two extremes: anodiscs with the highest (51%) and lowest (28%) porosity. Males produced essentially lower forces than females on anodiscs samples. Experimental insects performed well and showed normal locomotion on both smooth surfaces. On all anodiscs samples, beetles usually were not able to get a grip and slid over the surface, refused to walk and came to a standstill or even turned over on their backs. When substrates were inverted to 90° and 180°, insects were still able to remain attached to both the glass and sapphire samples, but failed on anodiscs. The reduction of insect attachment on anodiscs surfaces is explained by (1) possible absorption of the secretory fluid from insect pads by porous media and (2) effect of surface roughness.

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Sun, Jiyu, Zelai Song, Chunxiang Pan, and Zhuo Liu. "Analysis of Light-mass and High-strength Veins of Hind Wing from Asian Ladybird Beetle." In 2018 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO). IEEE, 2018. http://dx.doi.org/10.1109/3m-nano.2018.8552182.

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Matsishina, N. V., M. V. Ermak, P. V. Fisenko, O. A. Sobko, and A. G. Klykov. "On the similarity between the ecological responses of the potato ladybird beetle Henosepilachna Vigintioctomaculata (Motchulsky, 1857) (Coleoptera, Coccinellidae) and the Colorado potato beetle Leptinotarsa Decemlineata (SAY, 1824) (Coleoptera, Chrysomelidae)." In MATERIALS V INTERNATIONAL YOUTH APPLIED RESEARCH FORUM “OIL CAPITAL”: Conference Series “OIL CAPITAL”. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0178554.

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Muriel, Ricardo, Noel Perez, Diego S. Benitez, et al. "BeetleID: An Android Solution to Detect Ladybird Beetles." In 2021 IEEE Fifth Ecuador Technical Chapters Meeting (ETCM). IEEE, 2021. http://dx.doi.org/10.1109/etcm53643.2021.9590826.

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Nakamoto, M., C. Urata, A. Hozumi, T. Suga, and N. Hosoda. "The influence of surface wettability on the ladybird beetles attachment to solid surfaces." In 2015 International Conference on Electronic Packaging and iMAPS All Asia Conference (ICEP-IAAC). IEEE, 2015. http://dx.doi.org/10.1109/icep-iaac.2015.7111017.

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Quimbiamba, Fernanda, Noel Pérez-Pérez, Diego Benítez, et al. "Using YOLOv8 and Active Contour Models to Detect and Segment Ladybird Beetles in Natural Environments." In 2023 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC). IEEE, 2023. http://dx.doi.org/10.1109/ropec58757.2023.10409424.

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