Suppressive effect of Orius spp. (Hemiptera : Anthocoridae) on the population density of thrips on green pepper plants covered by a 4-mm mesh net in open field

Abstract

On green pepper plants in open field, thrips increased from the middle of June, whereas, Orius spp. increased in early July. When Orius spp. increased, thrips decreased. Thrips and Orius spp. occured on the plants covered by a 4-mm mesh net, as well as on the plants without a net. It seemed that Orius spp. suppressed thrips population density, on green pepper plants covered by a 4-mm mesh net in open field.