Ocorrência de bicho-mineiro (Leucoptera coffeella) em cafezal no município de Barra do Garças - MT

Abstract

The objective of this study was to investigate the occurrence of leaf miner (Leucoptera coffeella) in a coffee crop (Coffea sp) from March to September 2017. The information was obtained in an agroforestry coffee that was planted in 2013 in the Serra Verde settlement, Barra do Garças-MT, with spacing 3x1, shaded by native species, exotic and with additional irrigation. The design was randomized blocks, with three replicates, each block being composed of three lines having ten plants in each row. The coffee cultivars used were: Conilon "Robusta Tropical", Catuai Amarelo IAC 62 and Catucai Amarelo 2SL. Eight useful plants of each repetition were evaluated, being sampled 20 leaves per plant every 15 days. The evaluation period occurred between March and August of 2017, in which meteorological data were also recorded (relative humidity and average temperature). The number of leaves injured by miner leaf (L. coffeella) varied from 27% to 51%, and among the three evaluated cultivars there were no significant changes in the occurrence of L. coffeella. The population fluctuation of the occurrence of the miner in the varieties of coffee evaluated in the municipality of Barra do Garças indicates a positive relation with high temperatures and rainfall deficit in the analyzed period.