Efeito do triturador (trincha) sobre a emergência de adultos do bicho-mineiro Leucoptera coffeella (Lepidoptera: Lyonetiidade)

Abstract

Brazil is the largest producer and exporter of coffee (Coffea arabica L.). The miner, Leucoptera coffeella is a key pest in Brazilian coffee growing, causing significant losses in production due to the insults caused by the insect. The population dynamics of the miner varies according to the cultivation regions, due to biotic and abiotic factors. In the region of Araguari / MG, producers have reported occurrence of high populations and difficulty to control the pest. The objective of this work was to evaluate the effect of reducing the emergence of adults of L. coffeella with the use of the grinder (brush) in coffee plantations. The experiment was carried out at Fazenda Boa Esperança, located in Araguari / MG, in Catuaí 86 coffee plantation, planted in the 4 x 0.65m spacing. The experiment was installed in a completely randomized design with three treatments and eight replications. The Miac ASM-1 was used in the area to remove fallen coffee leaves under the canopy of the plants. The treatments consisted of the use of the Model S-160 AM / AH Crusher with one or two passes and control without using the equipment. After passing the crusher, all the material was collected in 1 m² in the crop line. The material was packed in 200 L plastic bags and taken to the UFU Entomology Laboratory where the emergence of adults of L. coffeella was verified daily up to 10 days after collection. The data were transformed into (root x + 0.5) and the means compared by Tukey's test (5%). It was found that the brush reduced the emergence of adults by 97% and 99% with the use of the equipment once and twice respectively, when compared to the control, where the leaves were collected intact, ie without the use of the brush. It can be concluded that the mechanical control provided by the equipment was efficient in reducing the emergence of adults of L. coffeella, so it can be integrated as another strategy in the management of the miner.