Susceptibility of Kanzawa spider mite, Tetranychus kanzawai Kishida, enter to mixture gas fumigation with methyl bromide and phosphine.

摘要

Tetranychus kanzawai (eggs, larvae, protonymphs, deutonymphs and adults) were fumigated with a mixture of methyl bromide (at 10 g m-3) and phosphine (at 3 g m-3) at 15鳦 to to determine their susceptibility. The LT50s and LT90s for the egg stage were 105.1 and 185.6 minutes, respectively. One hundred percent mortality of eggs was achieved by fumigating at 15鳦 for 240 minutes. Eggs were the most tolerant life stage.