Technological Parameters of Sugarcane Varieties Attacked by Diatraea Saccharalis.

Abstract

An alternative to the control of sugarcane borer is the choice of the more resistant varieties that adapt themselves to different production systems, guarantying a better productivity. This work aimed to evaluate technological parameters of sugarcane varieties attacked by Diatraea saccharalis. The experiment was implemented in a randomized 2x9-factorial scheme, from 2 different cultivation cycles, 2016 and 2017, with 9 varieties of sugarcane: CTC-9001; CT04-6043; CTC-7; CTC-22; CTC-25; CTC-9003; RB97-5952; RB96-6928 e RB85-5453, with 4 repetitions, 36 plots in total. At the end each cultivation cycle (2016 and 2017), it was evaluated the following parameters: tons of sugarcane´s stem per hectare (TSH); percents of attacked stems (%AS); Pol percents in broth (%Pol); percents of sugarcane´s fiber (%Fiber); percents of purity in broth (%Purity); Brix value of broth (°Brix); and total-recoverable sugar per ton of sugarcane (TRS). The varieties CT046043 and CTC7 had lower values of fiber and higher incidence of borer. The presence of sugar cane drill reduced the quality and quantity of sugarcane stalks. The variation of 10% in fiber content in sugarcane caused a 71% difference in the incidence of Diatraea saccharalis.