At high temperature of ℃, the survival at of the larvae falls rapidly to nought The temperature range for larval growth is 0- .℃, the optimum. 7.- 0℃.
At high temperature of ℃, the survival at of the larvae falls rapidly to nought The temperature range for larval growth is 0- .℃, the optimum. 7.- 0℃.
幼虫在0- .℃时有不同程度的生长,其中7- 0℃为最适生长温度;