Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 167
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Book Description
Rationale: In 2011, Wisconsin farmers grew 25.5 thousand hectares of cultivated potato worth an estimated 267 million dollars. Since 1995, systemic neonicotinoids have been used on approximately 85% of these acres to manage the Colorado potato beetle, Leptinotarsa decemlineata (Say) and other key pests. As a result of long-term reliance, neonicotinoid resistance in Colorado potato beetle has become common. In the spring of 2008 and 2009, growers reported changes in the colonization timing of Colorado potato beetle. Specifically, it was suggested that beetles were either extending or delaying their arrival times in commercial fields. Observed changes in beetle ecology typically occurred where neonicotinoid resistance had previously been documented in past seasons and may be an indication of an evolving relationship between insecticide resistance and changes in diapause patterns. A long colonization period resulted in the presence of several life stages of this insect in the crop simultaneously. Where protracted or delayed emergence occurred, many growers chose to manage these multiple life stages with high-risk, foliar applications. With increasing input costs growers may avoid proactive resistance management strategies, continuing to use generic neonicotinoid compounds paired with inexpensive, high risk foliar insecticide applications to manage resistant populations and maintain profit margins. Project Goal: To better understand the relationship between neonicotinoid use, Colorado potato beetle resistance, and environmental fate of neonicotinoids in the Central Sands agroecosystem. Objectives: I) To define the influence of previous (year) potato fields and adjacent diapause habitats on field scale Colorado potato beetle abundance. II) To use a common garden dormancy experiment to examine relationships between insecticide resistance, overwintering emergence phenology, and beetle fitness in field collected beetle populations. III) To document in-plant concentration and environmental fate of neonicotinoid insecticides when systemically applied in potato. Impact and Outcomes: An improved understanding of insecticide application methods and their effects on insect resistance management, insect ecology, and the surrounding environment will improve the long-term viability of systemic insecticides, which have become a keystone in our management program. Deliverable outcomes will inform sustainable, environmentally sound management plans for potato production systems and other specialty crops where systemic applications are commonplace.
Author: Kathleen Schnaars Uvino
Publisher:
ISBN: 9781303762789
Category :
Languages : en
Pages : 326
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Book Description
The Colorado potato beetle, Leptinotarsa decemlineata is infamous for its' ability to develop resistance to insecticides and remains the most important insect defoliator of potatoes today. Long Island populations of the Colorado potato beetle have been at the forefront of developing resistance to every newly developed insecticide. Managing the evolution of resistance requires cultural as well as chemical means. Cultural efforts include field rotation, crop rotation, chemical rotation as well as refugia. Movement plays an integral part of both, the cultural schemes intended to thwart resistance evolution and the life history traits of the Colorado potato beetle. The use of refuges and crop rotation are often promoted to supplement the use of chemical pesticides in an effort to control crop pests. Refuges are untreated areas adjacent to treated crops, where susceptible genes can survive. The efficacy of refuges depends on movement between treated and untreated areas. Differences in movement between resistant and susceptible beetles can play a big role in the success of the refuge or rotation plan. Crop rotation can reduce the amount of insecticide used through dosage levels or frequency of application and slows insects' resistance evolution. Resistance to insecticides often has fitness costs associated with that resistance. I hypothesized that resistance to the insecticide Imidacloprid is correlated with reduced movement capability in Colorado potato beetles, Leptinotarsa decemlineata (Say) (henceforth potato beetles), the primary insect defoliator of potato plants. I examined whether migratory ability or flight propensity have a cost of resistance to imidacloprid in Colorado potato beetles, Leptinotarsa decemlineata (Say) by examining LD50's of flying emergers and walking emergers in the spring. Imidacloprid is the most widely used and in some cases the only effective insecticide for Colorado potato beetle control and there is currently a wide range of variation in resistance. In the spring overwintering potato beetle adults halt diapause and emerge from overwintering sites. For the purposes of this work I will use the definition of diapause presented by Tauber et al (1986): "a neurohormonally mediated, dynamic state of minimal activity that occurs during a genetically determined stage(s) of metamorphosis, usually in response to environmental stimuli that precede unfavorable conditions." Diapause in the Colorado potato beetle begins before the harsh conditions set in (loss of host and cold temperatures). It is an important strategy employed by many temperate zone insects for overwintering. Upon emergence from the overwintering site they emigrate to colonize local and distant fields. Emergence from diapause therefore offers an opportunity to sample genetically diverse groups of beetles. My results indicate that emerging flyers have a higher level of resistance than emerging walkers from overwintering sites. I also examined populations that were under intense selection pressure from one chemical, Spinosad, and largely isolated from other fields or populations. Spinosad is produced by a soil dwelling bacterium called Saccharopolyspora spinosa and it kills by ingestion. Spinosad is currently the only approved chemical available to Organic farmers on Long Island. These results indicate complete failure of Spinosad on that population but less resistance on distant populations and less resistance on populations from conventionally managed fields, all in Suffolk County, Long Island. Additionally early spring colonists of rotated and `non-rotated' fields were evaluated for resistance levels for 3 years. For two of the three years, colonists on long distance rotated fields had high LD50. Assuming long distance colonization is more likely dependent on flight, this is consistent with my results that emerging flyers have a higher LD50 than emerging walkers.
Author: David L. Denlinger
Publisher: Cambridge University Press
ISBN: 1108755186
Category : Science
Languages : en
Pages : 465
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Book Description
Our highly seasonal world restricts insect activity to brief portions of the year. This feature necessitates a sophisticated interpretation of seasonal changes and enactment of mechanisms for bringing development to a halt and then reinitiating it when the inimical season is past. The dormant state of diapause serves to bridge the unfavourable seasons, and its timing provides a powerful mechanism for synchronizing insect development. This book explores how seasonal signals are monitored and used by insects to enact specific molecular pathways that generate the diapause phenotype. The broad perspective offered here scales from the ecological to the molecular and thus provides a comprehensive view of this exciting and vibrant research field, offering insights on topics ranging from pest management, evolution, speciation, climate change and disease transmission, to human health, as well as analogies with other forms of invertebrate dormancy and mammalian hibernation.
Author: Fanghao Wan
Publisher: Springer
ISBN: 9402409483
Category : Science
Languages : en
Pages : 369
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Book Description
The book discusses invasive-species problems in agriculture, forests and aquatic ecosystems, highlighting the invasive mechanisms and management of the selected invasive species. Biological invasion has become a serious global ecological and economic problem that deserves particular attention from both government officials and scientists. This volume focuses on three key scientific areas: 1) population establishment and spreading mechanisms of the selected invasive species; 2) ecology adaptation, population growth, expansion and evolution of invasive species; and 3) impact of bio-invasion on the ecosystem structure and function at community and ecosystem levels. The presented research will result in techniques for better management of invasive species.
Author: Jörg Romeis
Publisher: Springer Science & Business Media
ISBN: 1402083734
Category : Technology & Engineering
Languages : en
Pages : 451
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Book Description
Insect pests remain one of the main constraints to food and fiber production worldwide despite farmers deploying a range of techniques to protect their crops. Modern pest control is guided by the principles of integrated pest management (IPM) with pest resistant germplasm being an important part of the foundation. Since 1996, when the first genetically modified (GM) insect-resistant maize variety was commercialized in the USA, the area planted to insect-resistant GM varieties has grown dramatically, representing the fastest adoption rate of any agricultural technology in human history. The goal of our book is to provide an overview on the role insect-resistant GM plants play in different crop systems worldwide. We hope that the book will contribute to a more rational debate about the role GM crops can play in IPM for food and fiber production.
Author: Waqas Wakil
Publisher: Academic Press
ISBN: 0128135085
Category : Science
Languages : en
Pages : 374
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Book Description
Sustainable Management of Arthropod Pests of Tomato provides insight into the proper and appropriate application of pesticides and the integration of alternative pest management methods. The basis of good crop management decisions is a better understanding of the crop ecosystem, including the pests, their natural enemies, and the crop itself. This book provides a global overview of the biology and management of key arthropod pests of tomatoes, including arthropod-vectored diseases. It includes information that places tomatoes in terms of global food production and food security, with each pest chapter including the predators and parasitoids that have specifically been found to have the greatest impact on reducing that particular pest. In-depth coverage of the development of resistance in tomato plants and the biotic and abiotic elicitors of resistance and detailed information about the sustainable management of tomato pests is also presented. Provides basic biological and management information for arthropod pests of tomato from a global perspective, encompassing all production types (field, protected, organic) Includes chapters on integrated management of tomato pests and specific aspects of tomato pest management, including within protected structures and in organic production Presents management systems that have been tested in the real-world by the authors of each chapter Fully illustrated throughout with line drawings and color plates that illustrate key pest and beneficial arthropods associated with tomato production around the world
Author: Andrei Alyokhin
Publisher: Academic Press
ISBN: 0323984142
Category : Science
Languages : en
Pages : 520
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Book Description
This fully revised and updated second edition of Insect Pests of Potato now includes an opening section with a basic overview of agronomic and economic issues as they relate to potato production. It also features a new section that reviews potato production, as well as problems caused by insect pests and solutions to these problems, in all major potato-growing regions of the world. Further, a new section discusses theoretical foundations of potato pest management and includes chapters on ecological theory, evolutionary theory, and a case study on their applications to elucidate differences between Eastern and Western populations of Colorado potato beetle in North America. There is also a new chapter on the foundations of integrated pest management and their applications in controlling insect pests. The sections on the biology of main pests and on control methods now feature the latest information, including emphasis on recent advances in molecular biology and genomics. Information on the use of dsRNA technology for pest control is also included, as are new chapters on potato ladybirds and on hemipterous pests other than aphids and psyllids. This second edition provides improved integration and logical connections among chapters and expanded geographic scope of coverage making it the ideal reference on the topic. Fully revised and updated with new sections on potato-growing regions and theoretical foundations of potato pest management using ecological theory, evolutionary theory and relevant case study insights Contains improved integration and logical connections among chapters, expanded geographic scope of coverage, and scientific advances Emphasizes recent advances in molecular biology and genomics, including the use of dsRNA technology for pest control
Author: Lawrence I. Gilbert
Publisher: Academic Press
ISBN: 0123814502
Category : Science
Languages : en
Pages : 481
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Book Description
The publication of the extensive 7-volume work Comprehensive Molecular Insect Science provided library customers and their end-users with a complete reference encompassing important developments and achievements in modern insect science, including reviews on the ecdysone receptor, lipocalins, and bacterial toxins. One of the most popular areas in entomology is control, and this derivative work, Insect Control, taps into a previously unapproached market – the end user who desires to purchase a comprehensive yet affordable work on important aspects of this topic. Contents will include timeless articles covering insect growth- and development-disrupting insecticides, mechanisms and use of Bacillus thuringiensis, biology and genomics of polydnaviruses, pheromones: function and use in insect control, and more. New summaries for each chapter will give an overview of developments in the related article since its original publication. Articles selected by the known and respected editor-in-chief and co-editor of the original MRW The articles are classic reviews offering broad coverage of essential topics in insect control, with special addenda including author notes on the chapter since its original publication Introduction by the editors puts the selected body of work in context for this volume, highlighting the need for entomologists and related researchers to have these reviews in their personal collection
Author: A. Ciancio
Publisher: Springer Science & Business Media
ISBN: 1402060610
Category : Science
Languages : en
Pages : 366
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Book Description
This, the first volume of the ‘Integrated Management of Plant Pests and Diseases’ book series, presents general concepts on integrated pest and disease management. Section one includes chapters on infection models, resurgence and replacement, plant disease epidemiology and effects of climate change in tropical environments. The second section includes remote sensing and information technology. Finally, the third section covers molecular aspects of the subject.
Author: Steeve Hervé Thany
Publisher: Springer Science & Business Media
ISBN: 1441964452
Category : Medical
Languages : en
Pages : 127
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Book Description
The aim of this book is to summarize our understanding on the insect nicotinic acetylcholine receptors. This area of research received great impetus from the identification of the first subunit sequences to be used as neonicotinoid insecticide target sites. Although a book of this nature can provide the details only of commonly published results, it is hoped that it may provide a useful guide to the newcomer to the field as well as to point out some of the future challenges. For example, we need to determine the precise subunit nomenclature of insect nicotinic receptors. This nomenclature varies amongst species and this led to some of the early confusion that persists. We need to be precise in identifying the subunit composition of native insect nicotinic receptor subtypes, their functional properties and physiological roles.
