Abstract

The common cockchafer (Melolontha melolontha) and the forest cockchafer (Melolontha hippocastani) are among the most destructive insect pests in many European countries. Larvae feed on the roots of numerous plant species, thus inflicting severe damage and heavy economic losses. The two species are often discussed together because they are difficult to distinguish during the larval stage.However, they differ slightly in ecology and development. The aim of this study was to develop a quick PCR-RFLP (polymerase chain reaction-restriction fragment length polymorphism) method for easily identifying the two Melolonthaspecies through tissue samples or larvae, when reliable morphological identification is lacking. The strength of the method was tested on 43 M. melolonthaand 37 M. hippocastani individuals. We demonstrate that the technique is rapid and inexpensive, with strong implications for the effective management of these insect pests.

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