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Seus parasitos e predadores. Insetos, hospedeiros e inimigos naturais. Rio de Janeiro: Min. Agric. - Dept. Insp. Agropec. Serv. Def. San. Veg. - Lab. Central Pat.
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on the biological parameters of aphids - CiteSeerX
EFFECT OF A FUNGAL LECTIN FROM XEROCOMUS CHRYSENTERON (XCL) ON THE BIOLOGICAL PARAMETERS OF APHIDS Karimi JABER1, Frederic FRANCIS1, Laurent PAQUEREAU2, Didier FOURNIER2 & Eric HAUBRUGE1 1
Functional & Evolutionary Entomology, Gembloux Agricultural University Passage des Déportés 2, BE-5030 Gembloux, Belgium 2 IPBS – CNRS, Biotechnologie des protéines Route de Narbonne 205, FR-31077 Toulouse, France
SUMMARY Aphids are important pests of crop plants in Europe. Increasing resistance of aphids to insecticides and their side effects on the environment and non target organism’s including human’s stimulated research on alternative methods of aphid control, including the use of entomotoxic proteins. Lectins are carbohydrate binding proteins that are widely distributed in nature; they have been isolated from microorganisms, fungi, plants and animals. Several of these proteins were tested for their potential biocide effect on plenty of pests. A fungal lectin, namely Xerocomus Chrysenteron lectin (XCL) was previously purified and was shown to be toxic for several pests including aphids. XCL was clearly the most toxic lectin against M. persicae. In this work, bioassays using artificial diets incorporating a broad range of XCL concentrations (from 10 µg.ml-1 to 5000 µg.ml-1) were developed to assess the negative effects of XCL on the biological parameters (development duration, weight and fecundity) of M. persicae a polyphagous aphid found on more than 400 host plant species and transmitting more than 100 viral diseases. A significant mortality of aphids was observed, corresponding to the LC50 and LC90 of 0, 46 and 6, 02 mg/ml respectively after 24hrs. Significant differences of M. persicae weight, development duration and fecundity (P
