The effect of temperature on oviposition, fecundity and egg hatch in the pine beauty moth, Panolis flammea (Lepidoptera: Noctuidae)

Abstract

AbstractOver the temperature range 5° to 25°C, fecundity of Panolis flammea (Denis & Schiffermüller) showed a non-linear response, the optimal temperature for fecundity being 15°C. At 6°C females laid 17 eggs each whilst at 15°C they laid 166 eggs. Pre-oviposition period showed a significantly negative response, being shortest at 25°C (2.5 days). Adult longevity was significantly affected by temperature, being 20 days at 8°C and 6.8 days at 25°C. Egg hatch and development in the laboratory was linearly and positively related to temperature over the range of 2° to 20°C, ranging from 39.9 days at 5°C to 6 days at 25°C. The lethal limit for egg viability was 25°C. The theoretical threshold for egg development was calculated to be 2.79°C. Storage of eggs at temperatures of 2°C for periods in excess of 10 days had a significant effect on the percentage of eggs hatching. The significance of these findings in implementing control operations is discussed.