RELATIONSHIP BETWEN CONCENTRATION AND TIME OF EXPOSURE ON THE TOXICITY OF METHYL BROMIDE TO ACARUS SIRO L. AND RHIZOGLYPHUS ECHINOPUS (F. AND R. ) AT DIFFERENT TEMPERATURES.

NAKHLA, JOZAF M.; SEDRAK, RAGAA A.; ISKANDER, NABEL G.

doi:10.21608/ejar.1994.452601

RELATIONSHIP BETWEN CONCENTRATION AND TIME OF EXPOSURE ON THE TOXICITY OF METHYL BROMIDE TO ACARUS SIRO L. AND RHIZOGLYPHUS ECHINOPUS (F. AND R. ) AT DIFFERENT TEMPERATURES.

Document Type : Original Article

Authors

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

10.21608/ejar.1994.452601

Abstract

The interaction between temperature, concentration and period of exposure was studied when using methyl bromide fumigation against the adult and egg stages of Acarus siro L. and Rhizoglyphus echinopus (F.&R.). The results showed that the egg stage was more tolerant than the adult stage to methyl bromide. The gas becomes more effective against the egg and adult stages as the temperature increased from 10 to 30^°C . The effective concentrations decreased in amount as a result of the increase in temperature. The rate of decrease varied form one period of exposure to another, and according to the type of mite tested. Data showed that R. echinopus was more susceptible to methyl bromide than A. siro .