Nível de controle e danos de Sternechus subsignatus (Boheman) (Coleoptera: Curculionidae) em soja, no sistema de plantio direto

Density and spatial distribution of different development stages of Sternechus subsignatus Boheman (Coleoptera: Curculionidae) in soybean crops

“…The soybean stalk weevil reduces soybean productivity and it is highly harmful since both larvae and adults damage soybean (Silva et al, 1998). The adult produces a longitudinally fraying in the main stem and branches of the plant due to feeding and females in the form of a "ring" for egg oviposition (Casmuz et al, 2009b) while larval feeding, due to the destruction of the vascular system, reduces the flow of sap in the main stem completely preventing it (Silva, , 2000. Presumably, the status of S. subsignatus as a serious pest on soybean was due to the expansion of this culture in the mentioned countries during the last decades, facilitated by nontillage and minimum tillage systems (Casmuz et al, 2009a;Costilla and Venditti, 1990;Hoffmann-Campo et al, 1999;Panizzi et al, 1977;Pruett et al, 1996).…”