Evaluation and application of parasitoids for biological control of Aphis gossypii in glasshouse cucumber crops
Landbouwuniversiteit Wageningen, 1995
Hochschulschrift
Zugriff:
IntroductionAphids are an important problem in glasshouse vegetables. Already at low aphid densities fruits can get contaminated with honeydew, which decreases the economical value of the fruits. When aphids feed on the growing tips of the plants, the new shoots can get heavily distorted and plant growth is reduced. At the time this project was started integrated aphid control in cucumber and sweet pepper crops consisted of introduction of the parasitoid Aphidius matricariae Haliday (Hymenoptera: Braconidae) and the predatory gall midge Aphidoletes aphidimyza Rondani (Diptera: Cecidomyiidae). Integrated control of Myzus persicae Sulzer (Homoptera: Aphididae) in sweet pepper was effective, but A. gossypii was little affected by the introduced parasitoids. Additional control with the selective aphicide pirimicarb was also not possible since cotton aphid has developed resistance against this chemical. Aphid control with non-selective insecticides inhibits the use of biological control of other pests (like thrips and whitefly) in the glasshouse, which is applied on a large scale in the Netherlands. To be able to keep using biological control of other pests it is, therefore, necessary to develop an effective biological control programme for cotton aphid as well. In Chapter 1 the biology of cotton aphid and its most important natural enemies is described. This literature review showed that detailed data on the biology of A. gossypii were scarce. Therefore, the first experiments consisted of detailed research on the biology of cotton aphid.Research to develop biological control of A. gossypii can be divided into two main lines. First of all a selection of (a) potential candidate(s) for the control of A. gossypii has to be made. Many natural enemies of aphids are known, ranging from monophagous to polyphagous species. The natural enemies can be divided into three groups: pathogens (mainly parasitic fungi), predators (like ladybeetles, lacewings and hoverflies) and parasitoids. Based on several criteria, a literature ...
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Evaluation and application of parasitoids for biological control of Aphis gossypii in glasshouse cucumber crops
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Autor/in / Beteiligte Person: | van Steenis, M. |
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Veröffentlichung: | Landbouwuniversiteit Wageningen, 1995 |
Medientyp: | Hochschulschrift |
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