Entomology, Department of
Document Type
Article
Date of this Version
1977
Citation
Pesquisa Agropecuária Brasileira 12 (1977), pp. 119–124.
Abstract
Foi conduzido um experimento a campo, na Estação Experimental Agronômica da UFRGS, em Guaíba, RS, com o objetivo de determinar o efeito de vários inseticidas no controle da “broca-do-colo,” Elasmopalpus lignosellus (Zeller, 1848). Os tratamentos aplicados foram: 2 dosagens de Carbofuran no tratamento de sementes; 2 dosagens de Carbofuran, Aldicarb e Disulfoton granulado, aplicado no sulco na época do plantio; e 2 tratamentos de Endrin de 1 e 3 pulverizações no período de pós-emergência. Os resultados indicaram que apenas dois tratamentos com Endrin controlaram a broca. Rendimentos altos nos tratamentos com Endrin e Carbofuran granulado foram atribuídos ao controle da Anticarsia gemmatalis Hübner (1818). O tratamento de sementes com Carbofuran a 10 g/kg de sementes causou um efeito adverso na nodulação.
A field experiment was conducted at the Agronomy Research Station of the Federal University of Rio Grande do Sul, at Guaíba, RS, with the objective of determining the effectiveness of several chemical treatments on the control of the lesser cornstalk borers, Elasmopalpus lignosellus (Zeller 1848). Treatments consisted of 2 rates each of Carbofuran, Aldicarb, and Disulfoton as in-furrow granular treatment, carbofuran as a seed treatment and 2 treatments consisting of 1 and 3 applications of Endrin as a post-emergence spray. Results indicated only the 2 Endrin treatments as providing control of E. lignosellus. High grain yields in the Endrin and Carbofuran granular treatments were attributed to control of the leaf-feeding caterpillar Anticarsia gemmatalis Hübner (1818) as based on defoliation estimates. The only adverse treatment effect was a decrease in number of Rhizobium nodules/plant when Carbofuran was applied as a seed treatment at the rate of 10 g/kg of seeds.