Biological Characteristics and Effect of Temperature on the Development and Reproduction of Harpactor fuscipes (Hemiptera: Reduviidae) reared on Spodoptera litura (Lepidoptera: Noctuidae) Larvae
Harpactor fuscipes (Fabricius) is a potential biological control agent for Myzus persicae(Hemiptera: Aphididae), Heliothis assulta (Lepidoptera: Noctuidae) and Spodoptera litura (Fabricius) in tobacco fields. However, few studies have recorded the biological characteristics and effects of temperature on the development of this natural predator. We observed the biological characteristics and the effect of temperature on the development of immature and adult H. fuscipes predators at 15, 20, 25, 30, and 35°C with 60% relative humidity and a 16:8 L:D photoperiod on a diet of S. litura larvae. The results revealed two generations of H. fuscipes in Nanxiong Guangdong, including egg, 5 instars nymphal and adult, H. fuscipes live through the winter as adults. The optimum temperature for the development and reproduction of H. fuscipes was around 30°C. Temperatures in the range of 15-35°C had no effect on oviposition period, but the adults could not lay eggs normally at 15°C.
Our findings indicate that the biological traits and the differences in development and reproduction of H. fuscipes at different temperatures could be of importance for its mass rearing and use in the biological control of M. persicae, H. assulta and S. litura in tobacco fields.
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