THE USE OF HIGH TEMPERATURES FOR DISINFESTING WHEAT FROM SITOPHILUS GRANARIUSL., AND COWPEA CALLOSOBRUCHUS MACULATUS (F.)

Document Type : Original Article

Author

Plant protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt

Abstract

High temperatures were tested as a means of controlling all stag­es of Sitophilus granarius L. in wheat and Calfosobruchus maculatus F. in cowpea. Complete control of all immature stages of S. granariuos was chieved by exposing infested wheat to 70°C for 20 minutes. Complete kill for the adult stage occurred at 50°C for 15 minutes. In case of C. maculatus, eggs, larvae, pupae and adults were killed at 65°C for 20 minutes, 70°C for 20 minutes, 70°C for 15 minutes and 55°C for 20 minutes, respectively.