The Lethal Effect of High Temperature on Different Stages of Bactrocera correcta

The lethal effect of high temperature at all stages of Bactrocera correcta(Bezzi) was studied in this paper. The results showed that the mortality of the fruit fly eggs, larvae, pupae, and adults increased significantly with the temperature rising from 38, 40, 42, 44 to 46 ℃, with the treatment time prolonging from 1.5 h to 24.0 h. The sub-lethal high temperature zones for the eggs, larvae, pupae, and adults were 43.0-44.0, 44.0-45.0, 38.1-42.3, 38.2-43.8, respectively; the lethal high temperature zones for the eggs, larvae, pupae and adults were 45.0-46.0 ℃, over 46.0, 42.4-45.5 and 43.8-45.7 ℃, respectively. The relationship between the mortality (Y) of the fruit fly pupae and adults, and temperature (X₁), treatment time (X₂) was simulated as equations Y=828.63-45.22X₁-11.45X₂+0.616X²₁+0.300 4X₁X₂and Y=3 902.87-194.73X₁- 7.722X₂+2.424X²₁ +0.200 4X₁X₂.