Cold-sensitive period of ug3/ka1091 larvae occurs primarily during the first and second instar stage

Hours after egg laying when shifted to 17.5°Stage of development when shifted to 17.5°No. of adult survivors (±SD)
48–56 to eclosionEarly second instar onward2 (±1)
80–88 to eclosionEarly third instar onward39 (±2)
0–8 to 164–172Embryo to second instar only2 (±2)
21–27 to 69–75First instar only31 (±5.9)
48–56 to 96–104Second instar only21.3 (±6.2)
No cold treatment39.3 (±2.5)