Influência de diferentes densidades de semeadura de adubação verde nas injúrias provocadas pelo percevejo barriga verde (Dichelops spp) e na produtividade do milho em sistema de plantio direto

Abstract

The practice of no-till farming with the use of straw as mulch has led to changes in the Brazilian agricultural system. The aim of this study was to evaluate the influence of different sowing densities of green manure on the damage caused by the greenbug (Dichelops spp.) on the maize crop (Zea mays). This study took place in the experimental area of the Federal University of the Southern Frontier, located in the municipality of Laranjeiras do Sul - Paraná. The experimental design was organized in randomized blocks with six treatments (sowing densities of the consortium of vetch, turnip rape and black oats: 0, 40, 80, 100, 120 and 160% of the recommended dose) and four replications. Injury assessments took place between stages V2 and V8. Every week, 20 plants per plot were randomly assessed for leaf damage. The visual injury scale was used for the assessment. In general, the presence and incidence of the green-bellied stink bug Dichelops spp. in the study area were low and did not show a significant correlation with the different densities of green manure straw, and productivity with 100% fertilization stood out the most.