Eficiência de inseticidas associados com adjuvantes no controle de lagartas e percevejos na cultura da soja

Abstract

Soybeans yield is affected by many aspects and insect pests are important for its high reproductive potential and its yield reduction capacity. The main insect pest strategy of control is the chemical control with the use of insecticide associated with adjuvant. The study aimed to evaluate the effect of adjuvants associated with insecticide on the control of defoliating caterpillars and seed sucking bugs on soybeans. Two field experiments were carried out with the application of the treatments in distinct moments to each biologic target. The results of Anticarsia gemmatalis (small and large caterpillars and the total of caterpillars) demonstrated that the association of the Diflubenzurom insecticide with the adjuvants Assist® and Naturo il® presented superior agronomic efficiency despite not having statistical difference. The results of Piezodorus guildinii and Nezara viridula (large nymphs and adults and the total of stink bugs) control showed that with the use of adjuvant did not presented statistical difference, however, the agronomic efficiency of the Tiamethoxam and Lambda-cialotrina was superior with the addition of Assist® and Naturo il®. Based on the results was concluded that the adding of Assist® and Naturo il® to the Diflubenzurom insecticide improves the control of A. gemmatalis (small and large caterpillars and the total of caterpillars) on soybeans. The Adjuvants Assist® and Naturo il® improves the efficiency of Tiamethoxam and Lambda-cialotrina on the control of P. guildinii (nymphs above the 3o instar and adults) and N. viridula (nymphs above 3o instar and adults).