Results 241 to 250 of about 354,089 (265)
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Journal of Economic Entomology, 1983
Seven populations of Trialeurodes vaporariorum Westwood, each with a different history of exposure to insecticides, were surveyed for resistance to dichlorvos, malathion, methomyl, permethrin, and resmethrin. Six populations were resistant to methomyl, and four were resistant to resmethrin; one, with a long history of insecticide exposure, was slightly
David J. Horn, E. A. Elhag
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Seven populations of Trialeurodes vaporariorum Westwood, each with a different history of exposure to insecticides, were surveyed for resistance to dichlorvos, malathion, methomyl, permethrin, and resmethrin. Six populations were resistant to methomyl, and four were resistant to resmethrin; one, with a long history of insecticide exposure, was slightly
David J. Horn, E. A. Elhag
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Agriculture, Ecosystems & Environment, 2004
Some Mediterranean greenhouses are inserted in a landscape of open fields, non-agricultural and woody habitats. Both the greenhouse whitefly and its polyphagous predators are well adapted to protected and field crops. The phenology and intensity of whitefly and predator exchange between greenhouses and surrounding habitats were investigated in two ...
Oscar Alomar +4 more
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Some Mediterranean greenhouses are inserted in a landscape of open fields, non-agricultural and woody habitats. Both the greenhouse whitefly and its polyphagous predators are well adapted to protected and field crops. The phenology and intensity of whitefly and predator exchange between greenhouses and surrounding habitats were investigated in two ...
Oscar Alomar +4 more
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Monitoring greenhouse whitefly puparia and parasitism: A decision approach
New Zealand Journal of Crop and Horticultural Science, 1989Abstract The logarithm of the mean number of greenhouse whitefly (Trialeurodes vaporariorum) puparia per leaf, when sampled from a single leaf stratum of a greenhouse tomato crop, had a linear relationship to the proportion of infested leaves, on a complementary log-log scale. Whitefly puparia had a clumped distribution with strong correlations between
N. A. Martin, J. R. Dale
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Repellence and Anti-oviposition Activities of Plant Products on Greenhouse Whitefly
Pharmacognosy Communications, 2013Introduction: The greenhouse whitefly, Trialeurodes vaporariorum Westwood (Homoptera: Aleyrodidae), is an important cosmopolitan pest of many crops. Methods: The present study investigated the repellent and anti- oviposition activities of plant products from Achillea millefolium and Thymus vulgaris against this pest in greenhouse conditions.
Mahsa Dehghani, Kamal Ahmadi
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Pest Management Science, 2014
BACKGROUND Within integrated pest control programmes, the use of high mite inoculations to control hot spots of whitefly is desirable for many growers. In this experiment, two species of predatory mites established as commercial biological control agents,
N. Medd, Richard Greatrex
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BACKGROUND Within integrated pest control programmes, the use of high mite inoculations to control hot spots of whitefly is desirable for many growers. In this experiment, two species of predatory mites established as commercial biological control agents,
N. Medd, Richard Greatrex
semanticscholar +1 more source
Resistance in tomato to the greenhouse whitefly: analysis of population dynamics
Entomologia Experimentalis et Applicata, 1991AbstractLife history parameters including longevity, developmental time, and reproduction were determined for whiteflies, Trialeurodes vaporariorum (Westwood), kept in clip‐on cages on susceptible parent, Lycopersicon esculentum, resistant parent, L. hirsutum glabratum, and intermediate breeding lines of tomato.
Chris Mollema +2 more
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Impact of greenhouse whitefly management on strawberry fruit quality
Insect Science, 2007AbstractThe greenhouse whitefly, Trialeurodes vaporariorum (Westwood), is an important pest of strawberries in California, USA. The adults and nymphs feed on phloem sap of leaves to remove the photo‐assimilates. The objective of this study is to test the impact of whitefly management with insecticides on strawberry fruit quality.
Nick C. Toscano +2 more
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Surveillance for whiteflies on greenhouse roses and chrysanthemums in northern Tanzania
EPPO Bulletin, 2007A specific monitoring survey for whiteflies was conducted in greenhouse‐grown roses and chrysanthemums in northern Tanzania from October to December 2005. The survey objectives were to appraise the suitability of yellow traps made from locally available materials, to suggest action threshold levels, and to see if the area could be considered an Area of
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