English: The effect of kalata B1 on growth and development of Helicoverpa punctigera, a caterpillar from the Lepidopteran order. A diet containing 0.8 μmol/g kalata B1 for 16 days significantly hindered development of caterpillar larvae compared with larvae on a diet free of kalata B1. Although no mortality was observed in the first six days for larvae fed the kalata B1 diet, 50% failed to survive past day sixteen. Those that did survive failed to progress pass the first instar stage of development and on average weighed 3.3 mg compared with larvae on the kalata B1 free diet that achieved fifth instar and weighed on average 284 mg (7).