Effect of crop residue management on damage and eggs parasitism by Diatraea saccharalis F. (Lepidoptera: Crambidae) in sugarcane

FRANCOIS-REGIS GOEBEL; SALVATORE, ANALIA; PEREZ, MARIA LUCIA DEL PILAR; MARTA AYUP; GASTAMINZA, GERARDO; ISAS, MARCOS GERARDO; PADILLA, AGUSTIN EUGENIO

San Miguel de tucumán

Congreso; XXX Congreso Internacional de la caña de azúcar de la ISSCT 2019; 2019

Abstract. In the American continent, the sugarcane borer Diatraea saccharalis (F.) is the main pest in sugarcane producing areas. The objective of this study was to assess the effect of crop residue management on damages and eggs parasitoids of D. saccharalis. The study was carried out during 2011-2012, 2012-2013 and 2013-2014 crop cycles, in three commercial fields located in different regions of Tucumán state, Argentina. Two types of management (= treatments) of the crop residue were compared: conservation of trash at the soil surface (TC) and trash burning (TB). In ?trash conservation? treatment the crop residue was allowed to remain over the soil surface during the whole sugarcane growing season, while the second treatment consisted in complete burning approximately two weeks after harvest. The injury level was measured by stalk bored and internodes bored. Parasitism was estimated by counting the total number of eggs and number of black eggs (which indicates the occurrence of egg parasitoids). In all the parameters studied no difference was found between TB and TC.