Expression of Acp32CDScer\UAS.cLa under the control of Scer\GAL4hs.PB, using heat shock, does not affect viability, when a single heat shock is applied during the L1 (day 1), L2 (day 2), L3 (day 3 or 4) or pupal stage (day 5, 6, 7 or 9). Expression of Acp32CDScer\UAS.cLa under the control of Scer\GAL4hs.PB in adults using either single or multiple heat shocks is not toxic.