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Population Dynamics and “Outbreaks” of Diamondback Moth (Lepidoptera: Plutellidae) in Guangdong Province, China: Climate or Failure of Management?

Population Dynamics and “Outbreaks” of Diamondback Moth (Lepidoptera: Plutellidae) in Guangdong... Diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), became the major pest of Brassica vegetable production in Guangdong, a province in southeastern China, in the late 1980s and has continued to challenge growers, particularly during the spring and autumn. Control has relied on insecticides and, as has happened in other parts of the world, resistance to these has evolved and subsequent field control failures have occurred. We review and summarize the history of diamondback moth management in Guangdong. We show that the geographic distribution of the pest in China is well described by a simple climate niche model. Our model predicts the seasonal phenology and some of the variation in abundance among years in Guangdong. Discrepancies may reflect migration and insecticide use at a landscape level. The scale of the pest problem experienced varies with management practices. Local production breaks, and strict post harvest hygiene are associated with lower pest pressure on large-scale production units. As more and more insecticides become ineffective the need to implement an insecticide resistance management strategy, as well as basic integrated pest management practices, will become more pressing. The potential use and development of a better forecasting system for diamondback moth that will assist these developments is outlined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Economic Entomology Oxford University Press

Population Dynamics and “Outbreaks” of Diamondback Moth (Lepidoptera: Plutellidae) in Guangdong Province, China: Climate or Failure of Management?

Journal of Economic Entomology , Volume 105 (3) – Jun 1, 2012

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References (43)

Publisher
Oxford University Press
Copyright
© 2012 Entomological Society of America
ISSN
0022-0493
eISSN
1938-291X
DOI
10.1603/EC11384
Publisher site
See Article on Publisher Site

Abstract

Diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), became the major pest of Brassica vegetable production in Guangdong, a province in southeastern China, in the late 1980s and has continued to challenge growers, particularly during the spring and autumn. Control has relied on insecticides and, as has happened in other parts of the world, resistance to these has evolved and subsequent field control failures have occurred. We review and summarize the history of diamondback moth management in Guangdong. We show that the geographic distribution of the pest in China is well described by a simple climate niche model. Our model predicts the seasonal phenology and some of the variation in abundance among years in Guangdong. Discrepancies may reflect migration and insecticide use at a landscape level. The scale of the pest problem experienced varies with management practices. Local production breaks, and strict post harvest hygiene are associated with lower pest pressure on large-scale production units. As more and more insecticides become ineffective the need to implement an insecticide resistance management strategy, as well as basic integrated pest management practices, will become more pressing. The potential use and development of a better forecasting system for diamondback moth that will assist these developments is outlined.

Journal

Journal of Economic EntomologyOxford University Press

Published: Jun 1, 2012

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