Resistance of Saccharine Sorghum Cultivars to Sugarcane Borer Diatraea saccharalis

Abstract

The saccharine sorghum has been investigated as a complementary source of raw material for ethanol production, especially during the sugarcane off-season, however, it has been susceptible to the attack of the sugarcane borer Diatraea saccharalis. The objective of this work was to verify the effect of sorghum cultivars on D. saccharalis’ biological parameters. Cultivars, BRS 506, BRS 509 and BRS 511 were used to determine duration and survival rates of eggs, larvae, pre-pupae and pupa phases, along with larval weight and adult longevity. D. saccharalis completed its biological cycle in all treatments, however, when fed with dry extracts of BRS 509 cultivar, the net reproduction rate, the intrinsic rate of increase and the finite rate of increase was superior from the others. BRS 506 was the cultivar that negatively affected D. saccharalis’ biological parameters, with possible antibiosis effect. Based on this study, the sorghum cultivars evaluated are not recommended for a grain production system, since D. saccharalis’ larvae presented good development when fed with its dry extract incorporated into the diet.

Produtividade E Características Biométricas De Sorgo Sacarino Sob Torta De Filtro / Productivity and Biometric Characteristics of Sorghum Under Filter Pie

“…Resultados positivos vem sendo elucidados na literatura contemporânea sob a resposta do sorgo sacarino submetido as condições de salinidade, sob condições diferentes de adubação mineral, avaliação da resistência a broca da cana, efeitos da população de plantas, data da semeadura, época da colheita, entre outros (FIORINI et al, 2016;BARCELOS et al, 2018;MONTEIRO et al, 2018;SILVA SÁ et al, 2018;SILVA et al, 2019). Contudo, há poucos estudos com o uso de coprodutos da indústria sucroalcooleira, como a torta de filtro, na cultura do sorgo sacarino.…”