Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato

被引:12
|
作者
Smith, Hugh A. [1 ]
Krey, Karol L. [2 ]
机构
[1] Univ Florida, Gulf Coast Res & Educ Ctr, Wimauma, FL 33598 USA
[2] USDA ARS, 5230 Konnowac Pass Rd, Wapato, WA 98951 USA
关键词
sweetpotato whitefly; biological control; protected agriculture; zoophytophagous mirids; BIOLOGICAL-CONTROL; HOMOPTERA; HETEROPTERA; APHELINIDAE; HYMENOPTERA; PREDATOR; DAMAGE;
D O I
10.3390/insects10070213
中图分类号
Q96 [昆虫学];
学科分类号
摘要
The sweetpotato whitefly, Bemisia tabaci, is a pest of greenhouse-grown tomato. Restrictions on insecticides in enclosed structures and the presence of commercial pollinators limit the options for the chemical control of whiteflies in greenhouses, increasing the importance of biological controls. Dicyphus hesperus is a zoophytophagous mirid predator native to North America. Three release rates of D. hesperus were evaluated on greenhouse tomato for control of the sweetpotato whitefly. The release rates were one, two or three adult D. hesperus per tomato plant each week for three weeks in cages containing four tomato plants and one mullein banker plant. There were fewer whitefly eggs in cages receiving predators than untreated cages one week after the third release, and fewer whitefly nymphs in cages receiving predators two weeks after the third release. There were no statistical differences in whitefly eggs or nymphs among predator release treatments. The highest release rate resulted in a 60% reduction in whitefly nymphs. Forty-two days after the first predator releases, there were no differences among release treatments in the number of D. hesperus. Our results indicate that D. hesperus can contribute management of B. tabaci on greenhouse tomato, but that it may be insufficient as a sole strategy.
引用
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页数:8
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