INCIDENCIA DE Mahanarva fimbriolata DESPUÉS DE APLICACIONES DE Metarhizium anisopliae E IMIDACLOPRID EN CAÑA DE AZÚCAR

Abstract

Some factories of the State of Alagoas are using the fungus entomopathogenic Metarhizium anisopliae as control against Mahanrva fimbriolata. Being so this work it had how aim to value the quantity of nymphs and adults of spittlebug of the root after the air application of the biological insecticide (M. anisopliae), race PL-43 and of the Imidacloprido, and to analyze the costs of this application. The experiment was driven in the sugarcane region of the Factory Cachoeira, located in Maceió-AL, in the period understood between July and September of 2006, on the sugarcane variety SP813250. The application of the products took place in 19th of July of 2006 and the reapplication in 22th of August of the same year. There was carried out initially a population evaluation of nymphs and adults and others 15, 30 and 45 days after the treatments. The treatments did not differ between them, but when each area was analyzed separately, there were differences between sub-areas of the experimental area and between the periods of application. The total costs of the application of Imidacloprido, were less comparing with the other treatments.