COLORADO POTATO BEETLE (COLEOPTERA, CHRYSOMELIDAE) POPULATION DEVELOPMENT AND EFFECTS ON YIELD OF POTATOES WITH AND WITHOUT STRAW MULCH

被引：45
|
作者：
ZEHNDER, GW
HOUGHGOLDSTEIN, J
机构：
[1] Virginia Polytechnic Inst. & State Univ., Eastern Shore Agricultural Experiment Station, Painter
来源：
JOURNAL OF ECONOMIC ENTOMOLOGY | 1990年 / 83卷 / 05期
关键词：
D O I：
10.1093/jee/83.5.1982
中图分类号：
Q96 [昆虫学];
学科分类号：
摘要：
Leptinotarsa decemlineata population trends were monitored in Solanum tuberosum. Numbers of overwintered adult beetles, egg masses, and larvae were significantly lower in plots with straw mulch. Soil temperature and moisture conditions were more favorable for potato plant growth in Virginia under straw mulch than in bare ground plots. Final tuber yields were significantly greater in mulched plots (with and without insecticides) compared with plots without mulch in both years of the study. Application of insecticides in 1989 also resulted in higher yields within each mulch treatment. In plots treated with insecticides, six spray applications were required to control Colorado potato beetle populations above economic thresholds in plots without mulch, compared with two applications in plots with mulch. -from Authors
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页码：1982 / 1987
页数：6
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