Distribution of Aphis gossypii within cotton plant in solid planting and intercropping

Abstract

The influence of intercropping of the upland cotton (Gossypium hirsutum L. race latifolium Hutch.), CNPA Precoce 1 cultivar with corn (Zea mays L.), sorghum [Sorghum bicolor (L.) Moench], beans (Phaseolus vulgaris L.) or sesame (Sesamum indicum L.) in the distribution of cotton aphid (Aphis gossypii), within plant, throughout the cotton season, was studied at Ingá, PB, Brazil, in 1989. The results showed that: 1. the row intercroppings of upland cotton with corn, sorghum, bean or sesame do not affect the cotton aphid populations, 2. the vertical distribution of the cotton aphid populations, within cotton plant, is not affected by the planting system (solid upland cotton, upland cotton interplanted with corn, upland cotton interplanted with sorghum, upland cotton interplanted with bean and upland cotton interplanted with sesame), and, 3. the vertical distribution of cotton aphid populations, within plant, depends on the cotton age.