Prospecção da acarofauna e controle do ácaro alaranjado Dolichotetranychus floridanus banks 1900 (prostigmata: tenuipalpidae) em abacaxizeiro.

Abstract

The pineapple crop is of great importance for producers in terms of profitability by area. Moving the economy of various cities in region of Agreste Alagoano, the example of Arapiraca that some localities are producers of the fruit, such as the district of Poção, where this fruitful is grown on a large scale, especially by low-income producers. Its origin is of the Americas and has dispersed throughout Brazil, is cultivated in all regions, due to its expansion is attacked by some diseases and pests that reduce its production, among them the orange mite of the pineapple (Dolichotetranychus floridanus) (Prostigmata: Tenuipalpidae), responsible for economic losses to the producers, because it is installed in the leaf sheath forming colonies and when feeding of the cellular content produces entrance doors for pathogens such as the fungus Fusarium subglutinans which is the most harmful disease of the crop. The objectives of this work were to perform a survey on the fauna of mites found in pineapple seedlings; as well as to carry out the control of D. floridanus in seedlings with acaricides observing the effect of the chemical products on the associated predatory mites. Were collected seedlings for 12 months, three (3) seedlings were collected in five (5) different points in the same area, with 3 different áreas, the collected material was taken to the laboratory, sorted and the mites found during the research were made slides and identified demonstrating the fauna present in this culture. For the treatment of the seedlings, two experiments were carried out, in two different moments, the first one held in the Poção District and the second in Technological AgroFood Pole, were used the chemicals product Pirate®, Ortus®, Abamectin®, Lorsban®, using these in a dose of 50mL/50L, and for Orthene® e Kumulus®, 75g/50L, followed by recommendations. For the evaluations, the seedlings planted were removed from the soil and packed in the bags paper and plastic and transported to the Laboratory of Entomology and Acarology - UFAL, where the evaluations were carried during the survey period the following taxa were found, D. floridanus, Tyrophagus sp. Amblyseius sp. and Oribatida. In the control of seedlings, the treatment that obtained a better result for the first experiment was Lorsban®, controlling D. floridanus two days after the application of treatments for the second experiment the treatment which had a better average performance was the Ortus®, which managed to control 24.75% of total mites observed during the tests still for this experiment were verified the next generals Amblyseius sp. e Tyrophagus sp., and the families Cheletidae, Dinychidae, Rhodacaridae and Laelapidae, were not affected by the agrochemicals tested.