Reduction rate of insect eggs as a bioindicator of the abundance of entomophages

An indicatory method for indirect estimation of the abundance of predators and parasites in agrocoenoses is presented. The highest reduction of insect eggs has been observed in perennial crops or on areas not utilized agriculturally, whereas the lowest - on annual crops. Close to the area of coal mi...

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Published inPolish Ecological Studies (Poland) Vol. 7; no. 1
Main Author Kot, J. (Polska Akademia Nauk, Dziekanow Lesny k. Warszawy (Poland). Instytut Ekologii)
Format Journal Article
LanguageEnglish
Published 1981
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Summary:An indicatory method for indirect estimation of the abundance of predators and parasites in agrocoenoses is presented. The highest reduction of insect eggs has been observed in perennial crops or on areas not utilized agriculturally, whereas the lowest - on annual crops. Close to the area of coal mines and coking plants the egg reduction rate was two or even three times lower than in other sites. Egg reduction by predators and parasites had two peaks: spring-summer and summer-autumn. Larvae and imagines of Coccinellidae, Chrysopidae and heteroptera were mainly responsible for egg reduction. (Kot, J.)
Bibliography:H10
8200329
ISSN:0324-8763