Effect of systemic and contact insecticides on the control of soybean green stink bugs

Abstract

The effect of systemic and contact insecticides was tested against three species of soybean "green stink bugs', namely Nezara viridula ( L., 1758), Piezodorus guildinii (westwood 1837) and Edessa meditabunda (Fabr. 1794). Because of the low population of the insects during the period the experiment was conducted, individuals of the three species were used together. The work was accomplished in cages under field conditions in the 1977/78 soybean season. The following insecticides were used: monocrotophos, phosphamidon, omethoate, chlorthiophos, chlorpyriphos, profenophos, formothion, pyrimiphos-methyl, endosuifan, decamethrin and control. Three days after spraying, the following insecticides showed more efficiency and were statistically equivalents: decamethrin, phosphamidon, monocrotophos, chlorthiophos and formothion.