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Reduced Fitness of the Colorado Potato Beetle (Coleoptera: Chrysomelidae) on Potato Plants Grown in Manure-Amended Soil

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Date

2005

Journal Title

Journal ISSN

Volume Title

Publisher

Entomological Society of America

Abstract

Colorado potato beetle, Leptinotarsa decemlineata (Say), is the most important insect defoliator of potatoes worldwide. In this study, we conducted a series of no-choice assays comparing Colorado potato beetle reproduction and development on potato plants grown in manure-amended and synthetically fertilized soils. Manure-amended soil received annual applications of raw cow manure since 1991 and additional applications of cull potato compost and green manure between 1991 and 1998. Plants grown in manure-amended soil were inferior Colorado potato beetle hosts compared with plants grown in synthetically fertilized soil. The observed negative effects were broad in scope. Female fecundity was lower in field cages set up on manure-amended plots early in the season, although it later became comparable between the treatments. Fewer larvae survived past the first instar, and development of immature stages was slowed down on manure-amended plots. In the laboratory, first instars consumed less foliage from plants grown in manure-amended soils. These results show that organic soil management is associated with plant characteristics unfavorable for beetle reproduction and development, which should be taken into consideration when designing fully integrated crop management systems. © 2005 Entomological Society of America.

Description

Keywords

Colorado Potato Beetle, Insect Herbivory, Manure, Mineral Balance Hypothesis, Sustainable Agriculture

Turkish CoHE Thesis Center URL

WoS Q

Q2

Scopus Q

Q2

Source

Environmental Entomology

Volume

34

Issue

4

Start Page

963

End Page

968