Presentation on theme: "LARVAL FEEDING OF THE WESTERN CORN ROOTWORM (DIABROTICA VIRGIFERA VIRGIFERA LECONTE) ON ROOTS OF SEVERAL WEEDS AND ITS EFFECT ON CROP ROTATION József Takács,"— Presentation transcript:
LARVAL FEEDING OF THE WESTERN CORN ROOTWORM (DIABROTICA VIRGIFERA VIRGIFERA LECONTE) ON ROOTS OF SEVERAL WEEDS AND ITS EFFECT ON CROP ROTATION József Takács, Péter Balogh, Miklós Nádasy and Lénárd Márton University of Veszprém, Georgikon Faculty of Agriculture, Department of Agricultural Entomology, Keszthely, Hungary
Larval feeding of WCR
Questions Is it a monophagous pest? Can larvae feed on roots of other plants? Monocot vs. dicot weeds? Mortality on alternative hosts? Is it a monophagous pest? REALLY???
Is it a monophagous pest?
Is it monophagous? Really???
Danger!?! Developing on alternative roots Development of WCR larvae is not possible on alternative host plants. Mortality is so high! BUT!!!
Weeds are suitable for larvae as survival nutriments!
Feeding on alternative hosts
Summarized Survival nutrition on alternative roots Weedy cornfields! HIGHER SURVIVAL RATIO HIGHER DAMAGES!!!
Adult feeding on alternative host plants
Problems in fallow management Weeds on fallow fields Oviposition on weedy plots Larval damages in next year corn
Crop rotation is one of the most effective control method! REALLY???