An Evaluation of Alternative Pest Controls for the Colorado Potato Beetle, Leptinotarsa Decemlineata (Say) on Organic Potatoes [microform] PDF Download

Author: Tara L. Moreau
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612897700
Category : Colorado potato beetle
Languages : en
Pages : 0

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Author: Tara L. Moreau
Publisher:
ISBN:
Category : Colorado potato beetle
Languages : en
Pages : 228

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Author: Caroline Mildred Stetter Neel
Publisher:
ISBN:
Category : Colorado potato beetle
Languages : en
Pages : 138

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Author: Kathleen Schnaars Uvino
Publisher:
ISBN: 9781303762789
Category :
Languages : en
Pages : 326

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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: Chase W. Metzger
Publisher:
ISBN:
Category : Pests
Languages : en
Pages : 130

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Author: J C (Joseph-Charles) 1820-189 Taché
Publisher: Legare Street Press
ISBN: 9781014357021
Category :
Languages : en
Pages : 48

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This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Author: Charles Valentine Riley
Publisher: Nabu Press
ISBN: 9781293568446
Category :
Languages : en
Pages : 114

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This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Potato Pests: Being An Illustrated Account Of The Colorado Potato-beetle And The Other Insect Foes Of The Potato In North America. With Suggestions For Their Repression And Methods For Their Destruction Charles Valentine Riley Orange Judd company, 1876 Cooking; Specific Ingredients; Vegetables; Colorado potato beetle; Cooking / Specific Ingredients / Vegetables; Insect pests; Potatoes; Technology & Engineering / Pest Control

Author: Steven P. Mroczkiewicz
Publisher:
ISBN:
Category :
Languages : en
Pages : 310

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Author: Charles Valentine Riley
Publisher:
ISBN:
Category : Colorado potato beetle
Languages : en
Pages : 116

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Author: G. Mailloux
Publisher:
ISBN: 9780662213734
Category : Agricultural pests
Languages : en
Pages : 25

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The Colorado potato beetle (Leptinotarsa decemlineata) is the main insect pest of potatoes in North America. Integrated pest management (IPM) is designed to manage pest populations by using several ecologically sustainable methods of control, with the objective of maintaining population densities below the economic injury level. This report reviews: the biology of the Colorado potato beetle and factors influencing its life cycle; the economic injury level in terms of number of beetles per plant, as determined from a study conducted in Quebec; a sampling plan developed to facilitate IPM decision-making; the effect of plant defoliation on potato yields; and pest control strategies for the beetle, including crop rotation, late planting, the use of mulches and barriers, biological control, and use of insecticides.