Performance de produtos em diferentes manejos para controle de cigarrinha do milho safrinha

Abstract

The corn leafhopper (Dalbulus maidis) is a pest that has caused significant 25 damage in recent times in the corn crop, through its complex of diseases transmitted by 26 it, such as red stun, pale stun and virus such as fine streaked. For many years, this pest

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27 did not receive much attention in research, as it was considered a secondary pest, but this 28 scenario has long since changed, as the pest started to have the status of a primary pest. 29 The objective of this work was to evaluate different chemical managements in the control 30 of corn leafhopper. The experiment consisted of five evaluation plots, without 31 randomization. The treatments were T1 (witness), T2 (acephate + Thiamethoxam + 32 Lambda-Cyalothrin), T3 (acephate + Imiachloripe + Bifenthrin), T4 (acephate + 33 Acentamipride + Bifenthrin) and T5 (acephate + Beta-cyfluthrin + Imidachloripe). The 34 efficiency of corn leafhopper control was evaluated as a function of each application over 35 time, by quantifying the number of nymphs present in the evaluation area. The plot in 36 which the association between the active ingredients acephate and Acentamipride + 37 Bifenthrin was used provided greater efficiency in the control of corn leafhopper.