Interação entre as culturas de amora e mirtilo e as adventícias associadas: os tripes e seus inimigos naturais

Abstract

The insects present in the blackberry and blueberry crops are still almost unknown in Portugal. Thrips and their natural enemies were surveyed in these crops, during the flowering period, in Odemira region, as well as in the weeds inside and around the crops areas. This allows an evaluation of the entomological interaction cropweeds, for a future management of weeds taking also into account crops protection against pests. The preliminary results obtained are presented. Thrips flavus and T. tabaci were the most abundant thrips in the crops. Weeds where Thrips sp. adults were more abundant were Arctotheca calendula, Crepis capillaris, Senecio gallicus, Geranium molle, Malva parviflora, Lavatera cretica and Lupinus luteus. In this last weed species, Aeolothrips spp. predators were abundant. The heteropterans Orius sp., predators of thrips, were detected in the blackberry crop, and also on Conyza bonariensis, Conyza sumatrensis, Sonchus tenerrimus and Echium plantagineum