Avaliação de variedades RB (República do Brasil) de cana-de-açúcar em relação ao ataque de pragas

Abstract

The aim of this work was to evaluate the behavior of varieties RB (Republic of Brazil) of sugar cane in relation to the attack of Diatraea spp. (Lepidoptera: Crambidae), Mahanarva spp. (Hemiptera: Cercopidae) and Telchin licus licus (Drury, 1770) (Lepidoptera: Castniidae). Two systems of cultivations were used, rainfed and irrigated. The varieties studied in the rainfed cultivation were as follows: RB72454, RB867515, RB971755, RB951541, RB931003, RB92579, RB863129, and RB93509. For the irrigated system, the variety RB98710 was also included. In the rainfed system, with all varieties in combined analysis, the results showed that the damages were not significantly different. In the irrigated system the variety RB971755 was externally more damaged. Concerning to the complex borer/rottenness for occasion of the harvest, in both systems, all varieties showed similar behavior in relation to the attack of Diatraea spp, It was not possible to identify any variety with a remarkable preference for Mahanarva spp., in both systems. Again, in both systems, the results showed that the studied varieties did not differ statistically in relation to the attack of T. licus licus. Finally, the values of internal damages of Diatraea spp. and T. licus licus did not show any significantly correlations with the agroindustrial parameters evaluated.