Effect of Temperature on the Predator, <Xylocoris flavipes</i> (Reuter) (Hemiptera: Anthocordiae) Feeding on <i>Cryptolestes pusillus</i> (Schon.) (Coleoptera: Cucujidae)
Keywords:Xylocoris flavipes, Cryptolestes pusillus, life history, temperature, developmental time
Xylocoris flavipes (Reuter) is one of the dominant predators of many stored product insect pest including Cryptolestes pusillus. The influence of temperature on predator development, survival and some selected life history parameters was determined. Eggs laid/female (27.27Â±2.52) and egg hatching rate (%) (88.25Â±2.19) were highest at 30Â°C and lowest at 20Â°C (5.43Â±1.19 and 30.79Â±4.63%) respectively but no eggs laid at 15Â°C. Mortality among immature stages (%) was highest (51.71Â±1.48) at 35Â°C and lowest (24.25cÂ±1.14) at 25Â°C. Developmental times decreasing with the increasing of temperature. Maximum numbers of progeny/female/day (3.55Â±0.76) were produced at 25Â°C and minimum (0.83Â±0.04) were at 20Â°C.The sex ratios (% female) of X. flavipes were 47.04, 56.68, 51.66 and 50.07 for 20, 25, 30 and 35Â°C respectively. Survivorship of ovipositing females was highest at 25Â°C but lowest at 35Â°C respectively.
Key words: Xylocoris flavipes, Cryptolestes pusillus, life history, temperature, developmental time Â
J. bio-sci. 15: 41-46, 2007