Applications of copper-based fungicides and infestations of Leucoptera coffeella (Guérin-Mèneville & Perrottet) in coffee plants

Abstract

The present study aimed to evaluate the effects of applying fungicides with different sources of copper and of the number of applications on the occurrence of Leucoptera coffeella (Guérin-Menéville & Perrottet, 1842) (Lepidoptera: Lyonetiidae) and on the wax content on leaves in a coffee plantation. Four applications of fungicides were carried out, and the effects on the number of leaves mined by the insect and on the wax content on the leaf surface were evaluated. The copper- based fungicides increased the number of leaves mined by the leaf-miner and reduced the wax content on the coffee leaf surfaces in both periods studied.O presente trabalho teve como objetivo avaliar os efeitos de aplicações de diferentes fontes de fungicidas cúpricos e de números de aplicações, na ocorrência de Leucoptera coffeella (Guérin-Menéville & Perrottet, 1842) (Lepidoptera: Lyonetiidae) e no teor de cera das folhas em lavoura cafeeira. Foram realizadas quatro aplicações de fungicidas e foi avaliado os efeitos no número de folhas minadas pelo inseto e no teor de cera da superfície foliar. Os fungicidas cúpricos aumentaram o número de folhas minadas pelo bicho-mineiro e reduziram o teor de cera das superfícies das folhas do cafeeiro nas duas épocas estudadas.