Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-09-25DOI: 10.1146/annurev-ento-060120-091620
Lian-Sheng Zang, Su Wang, Fan Zhang, Nicolas Desneux
{"title":"Biological Control with <i>Trichogramma</i> in China: History, Present Status, and Perspectives.","authors":"Lian-Sheng Zang, Su Wang, Fan Zhang, Nicolas Desneux","doi":"10.1146/annurev-ento-060120-091620","DOIUrl":"https://doi.org/10.1146/annurev-ento-060120-091620","url":null,"abstract":"<p><p><i>Trichogramma</i> species make up one of the most commonly used groups of natural enemies for biological control programs worldwide. Given the major successes in using <i>Trichogramma</i> to control economically important lepidopterous pests on agricultural crops in China, the biology and ecology of these wasps have been intensively studied to identify traits that contribute to successful biological control. Since the 1960s, improved mass production of <i>Trichogramma</i> and better augmentative release methods to suppress agricultural pests have been achieved. We review the history of research and development; current knowledge on biodiversity and bio-ecology of the species used; and achievements in mass-rearing methods, release strategies, and current large-scale applications in China. In addition, we discuss potential issues and challenges for <i>Trichogramma</i> research and applications in the future<i>.</i></p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"463-484"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-060120-091620","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38516544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-08-21DOI: 10.1146/annurev-ento-061520-083414
Dimitar Dimitrov, Gustavo Hormiga
{"title":"Spider Diversification Through Space and Time.","authors":"Dimitar Dimitrov, Gustavo Hormiga","doi":"10.1146/annurev-ento-061520-083414","DOIUrl":"https://doi.org/10.1146/annurev-ento-061520-083414","url":null,"abstract":"<p><p>Spiders (Araneae) make up a remarkably diverse lineage of predators that have successfully colonized most terrestrial ecosystems. All spiders produce silk, and many species use it to build capture webs with an extraordinary diversity of forms. Spider diversity is distributed in a highly uneven fashion across lineages. This strong imbalance in species richness has led to several causal hypotheses, such as codiversification with insects, key innovations in silk structure and web architecture, and loss of foraging webs. Recent advances in spider phylogenetics have allowed testing of some of these hypotheses, but results are often contradictory, highlighting the need to consider additional drivers of spider diversification. The spatial and historical patterns of diversity and diversification remain contentious. Comparative analyses of spider diversification will advance only if we continue to make progress with studies of species diversity, distribution, and phenotypic traits, together with finer-scale phylogenies and genomic data.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"225-241"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-061520-083414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38295966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-09-15DOI: 10.1146/annurev-ento-060920-094531
Xiao-Wei Wang, Stéphane Blanc
{"title":"Insect Transmission of Plant Single-Stranded DNA Viruses.","authors":"Xiao-Wei Wang, Stéphane Blanc","doi":"10.1146/annurev-ento-060920-094531","DOIUrl":"https://doi.org/10.1146/annurev-ento-060920-094531","url":null,"abstract":"<p><p>Of the approximately 1,200 plant virus species that have been described to date, nearly one-third are single-stranded DNA (ssDNA) viruses, and all are transmitted by insect vectors. However, most studies of vector transmission of plant viruses have focused on RNA viruses. All known plant ssDNA viruses belong to two economically important families, <i>Geminiviridae</i> and <i>Nanoviridae</i>, and in recent years, there have been increased efforts to understand whether they have evolved similar relationships with their respective insect vectors. This review describes the current understanding of ssDNA virus-vector interactions, including how these viruses cross insect vector cellular barriers, the responses of vectors to virus circulation, the possible existence of viral replication within insect vectors, and the three-way virus-vector-plant interactions. Despite recent breakthroughs in our understanding of these viruses, many aspects of plant ssDNA virus transmission remain elusive. More effort is needed to identify insect proteins that mediate the transmission of plant ssDNA viruses and to understand the complex virus-insect-plant three-way interactions in the field during natural infection.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"389-405"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-060920-094531","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38478466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juan Luis Jurat-Fuentes, David G Heckel, Juan Ferré
{"title":"Mechanisms of Resistance to Insecticidal Proteins from <i>Bacillus thuringiensis</i>.","authors":"Juan Luis Jurat-Fuentes, David G Heckel, Juan Ferré","doi":"10.1146/annurev-ento-052620-073348","DOIUrl":"https://doi.org/10.1146/annurev-ento-052620-073348","url":null,"abstract":"<p><p>Insecticidal proteins from the bacterium <i>Bacillus thuringiensis</i> (<i>Bt</i>) are used in sprayable formulations or produced in transgenic crops as the most successful alternatives to synthetic pesticides. The most relevant threat to sustainability of <i>Bt</i> insecticidal proteins (toxins) is the evolution of resistance in target pests. To date, high-level resistance to <i>Bt</i> sprays has been limited to one species in the field and another in commercial greenhouses. In contrast, there are currently seven lepidopteran and one coleopteran species that have evolved practical resistance to transgenic plants producing insecticidal <i>Bt</i> proteins. In this article, we present a review of the current knowledge on mechanisms of resistance to <i>Bt</i> toxins, with emphasis on key resistance genes and field-evolved resistance, to support improvement of <i>Bt</i> technology and its sustainability.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"121-140"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39133051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-09-14DOI: 10.1146/annurev-ento-011019-024932
Ring T Cardé
{"title":"Navigation Along Windborne Plumes of Pheromone and Resource-Linked Odors.","authors":"Ring T Cardé","doi":"10.1146/annurev-ento-011019-024932","DOIUrl":"https://doi.org/10.1146/annurev-ento-011019-024932","url":null,"abstract":"<p><p>Many insects locate resources such as a mate, a host, or food by flying upwind along the odor plumes that these resources emit to their source. A windborne plume has a turbulent structure comprised of odor filaments interspersed with clean air. As it propagates downwind, the plume becomes more dispersed and dilute, but filaments with concentrations above the threshold required to elicit a behavioral response from receiving organisms can persist for long distances. Flying insects orient along plumes by steering upwind, triggered by the optomotor reaction. Sequential measurements of differences in odor concentration are unreliable indicators of distance to or direction of the odor source. Plume intermittency and the plume's fine-scale structure can play a role in setting an insect's upwind course. The prowess of insects in navigating to odor sources has spawned bioinspired virtual models and even odor-seeking robots, although some of these approaches use mechanisms that are unnecessarily complex and probably exceed an insect's processing capabilities.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"317-336"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-011019-024932","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38380000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-08-21DOI: 10.1146/annurev-ento-041620-083838
Christen K Mirth, Timothy E Saunders, Christopher Amourda
{"title":"Growing Up in a Changing World: Environmental Regulation of Development in Insects.","authors":"Christen K Mirth, Timothy E Saunders, Christopher Amourda","doi":"10.1146/annurev-ento-041620-083838","DOIUrl":"https://doi.org/10.1146/annurev-ento-041620-083838","url":null,"abstract":"<p><p>All organisms are exposed to changes in their environment throughout their life cycle. When confronted with these changes, they adjust their development and physiology to ensure that they can produce the functional structures necessary for survival and reproduction. While some traits are remarkably invariant, or robust, across environmental conditions, others show high degrees of variation, known as plasticity. Generally, developmental processes that establish cell identity are thought to be robust to environmental perturbation, while those relating to body and organ growth show greater degrees of plasticity. However, examples of plastic patterning and robust organ growth demonstrate that this is not a hard-and-fast rule.In this review, we explore how the developmental context and the gene regulatory mechanisms underlying trait formation determine the impacts of the environment on development in insects. Furthermore, we outline future issues that need to be resolved to understand how the structure of signaling networks defines whether a trait displays plasticity or robustness.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"81-99"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-041620-083838","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38295968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-09-11DOI: 10.1146/annurev-ento-072720-095043
Taiping Gao, Chungkun Shih, Dong Ren
{"title":"Behaviors and Interactions of Insects in Mid-Mesozoic Ecosystems of Northeastern China.","authors":"Taiping Gao, Chungkun Shih, Dong Ren","doi":"10.1146/annurev-ento-072720-095043","DOIUrl":"https://doi.org/10.1146/annurev-ento-072720-095043","url":null,"abstract":"During the past 20 years, more than 1,600 species of well-preserved fossil insects, including members of over 270 families within 24 orders, have been described from the Middle Jurassic Yanliao Entomofauna and Early Cretaceous Jehol Entomofauna in Northeastern China. Diversified fossil insects not only document the origin, systematics, and early evolution of many lineages, but also reveal these lineages' behaviors and interactions with coexisting plants, vertebrates, and other insects in their ecosystems. For example, fossil evidence has been documented, for example, regarding insects' feeding and pollination mutualism with gymnosperms; ectoparasitic feeding on blood of vertebrates; camouflage, mimicry of gymnosperm plants, and eyespot warning; sound stridulation for attracting potential mates; and sexual display, mating, egg-laying, and parental care. In this article, we review the diverse taxonomy of mid-Mesozoic insects of Northeastern China and elucidate their behaviors and interactions within their ecosystems, which have impacted their early evolution and development into extant insects. Expected final online publication date for the Annual Review of Entomology, Volume 66 is January 11, 2020. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"337-354"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-072720-095043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38467385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-09-14DOI: 10.1146/annurev-ento-040920-061140
Hongjie Li, Soleil E Young, Michael Poulsen, Cameron R Currie
{"title":"Symbiont-Mediated Digestion of Plant Biomass in Fungus-Farming Insects.","authors":"Hongjie Li, Soleil E Young, Michael Poulsen, Cameron R Currie","doi":"10.1146/annurev-ento-040920-061140","DOIUrl":"https://doi.org/10.1146/annurev-ento-040920-061140","url":null,"abstract":"<p><p>Feeding on living or dead plant material is widespread in insects. Seminal work on termites and aphids has provided profound insights into the critical nutritional role that microbes play in plant-feeding insects. Some ants, beetles, and termites, among others, have evolved the ability to use microbes to gain indirect access to plant substrate through the farming of a fungus on which they feed. Recent genomic studies, including studies of insect hosts and fungal and bacterial symbionts, as well as metagenomics and proteomics, have provided important insights into plant biomass digestion across insect-fungal mutualisms. Not only do advances in understanding of the divergent and complementary functions of complex symbionts reveal the mechanism of how these herbivorous insects catabolize plant biomass, but these symbionts also represent a promising reservoir for novel carbohydrate-active enzyme discovery, which is of considerable biotechnological interest.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"297-316"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-040920-061140","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38380001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual review of entomologyPub Date : 2021-01-07Epub Date: 2020-09-23DOI: 10.1146/annurev-ento-061720-071644
Casper J van der Kooi, Doekele G Stavenga, Kentaro Arikawa, Gregor Belušič, Almut Kelber
{"title":"Evolution of Insect Color Vision: From Spectral Sensitivity to Visual Ecology.","authors":"Casper J van der Kooi, Doekele G Stavenga, Kentaro Arikawa, Gregor Belušič, Almut Kelber","doi":"10.1146/annurev-ento-061720-071644","DOIUrl":"https://doi.org/10.1146/annurev-ento-061720-071644","url":null,"abstract":"<p><p>Color vision is widespread among insects but varies among species, depending on the spectral sensitivities and interplay of the participating photoreceptors. The spectral sensitivity of a photoreceptor is principally determined by the absorption spectrum of the expressed visual pigment, but it can be modified by various optical and electrophysiological factors. For example, screening and filtering pigments, rhabdom waveguide properties, retinal structure, and neural processing all influence the perceived color signal. We review the diversity in compound eye structure, visual pigments, photoreceptor physiology, and visual ecology of insects. Based on an overview of the current information about the spectral sensitivities of insect photoreceptors, covering 221 species in 13 insect orders, we discuss the evolution of color vision and highlight present knowledge gaps and promising future research directions in the field.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"435-461"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1146/annurev-ento-061720-071644","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38410338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Interplay Between Viruses and RNAi Pathways in Insects.","authors":"Bryony C Bonning, Maria-Carla Saleh","doi":"10.1146/annurev-ento-033020-090410","DOIUrl":"https://doi.org/10.1146/annurev-ento-033020-090410","url":null,"abstract":"<p><p>As an overarching immune mechanism, RNA interference (RNAi) displays pathogen specificity and memory via different pathways. The small interfering RNA (siRNA) pathway is the primary antiviral defense mechanism against RNA viruses of insects and plays a lesser role in defense against DNA viruses. Reflecting the pivotal role of the siRNA pathway in virus selection, different virus families have independently evolved unique strategies to counter this host response, including protein-mediated, decoy RNA-based, and microRNA-based strategies. In this review, we outline the interplay between insect viruses and the different pathways of the RNAi antiviral response; describe practical application of these interactions for improved expression systems and for pest and disease management; and highlight research avenues for advancement of the field.</p>","PeriodicalId":8001,"journal":{"name":"Annual review of entomology","volume":"66 ","pages":"61-79"},"PeriodicalIF":23.8,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39133049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}