Night application of insecticides to burrower bug control in peanuts

Abstract

The burrower bug, Cyrtomenus mirabilis (Hemiptera: Cydnidae) has been shown to be an important soil pest in the peanut crop in Brazil by damage caused. Laboratory studies have shown that some insecticides are efficient for control. However, the form of application can have great interference in its effectiveness. Thus, the objective was to evaluate the effectiveness of insecticides applied at night in the occurrence and damage of burrower bug in peanuts. The experiment was assay at Apta, Polo Centro Norte, in Pindorama - SP. The experimental design was in randomized blocks, with four replications. The treatments were: Regent® Duo (1,000 mL ha^-1 and 200 mL ha^-1), Saber® (1,000 mL ha^-1), Meta Turbo SC (1,000 mL ha^-1), Fastac® Duo (1,000 mL ha^-1) 1) and a witness. The application of Regent® Duo (1,000 mL ha^-1) was carried out in furrow and the other applications were carried out at 82 days after sowing at night (8:00 pm). The parameters evaluated were the number of burrower bug per trench, the number of kernels with symptoms of attack and the residue of insecticides in the kernels. The treatments Regent® Duo (200 mL ha^-1) and Saber® (1000 mL ha^-1) showed efficiency of control and damage reduction above 87%. The insecticides in the doses and evaluated conditions do not present residues of insecticides in the peanut kernels at harvest.