POPULATION FLUCTUATION OF SUCKING INSECTS IN IRRIGATED AND NON-IRRIGATED COTTON CROPS

In the cotton crop (Gossypium hirsutum L.), there is a complexity of pests that appear systematically, thus significantly reducing yield; and their population fluctuation strongly influenced by meteorological conditions result in greater or lesser density these insects. Thus, this work aimed to evaluate insect with sucking feeding behavior an area without irrigation plant under second-harvest conditions. The experiment was developed at State University Maringá - Campus Umuarama. experimental area, grid meshes 10 × m were demarcated, forming plots 100 m², resulting total 64 points irrigated 42 non-irrigated area. sampling demarcated center each where three randomly selected plants sampled. Samplings carried out weekly, from 37 122 days after emergence (DAE) cotton, examining aerial part plant, observe presence aphids (Aphis gossypii), thrips (Frankliniella schultzei), whitefly (Bemisia tabaci). provided highest peaks whiteflies thrips. On other hand, had higher incidence aphids. However, increase ladybugs, reduced significantly, showing efficiency importance control natural predators.