Biological Characteristics and Effect of Temperature on the Development and Reproduction of Harpactor fuscipes (Hemiptera: Reduviidae) reared on Spodoptera litura (Lepidoptera: Noctuidae) Larvae
Keywords:Harpactor fuscipes, Myzus persicae, Heliothis assulta, Spodoptera litura, biological characteristics, developmental durations, biological control
Harpactor fuscipes (Fabricius) is a potential biological control agent for Myzus persicae(Hemiptera: Aphididae), Heliothis assulta (Lepidoptera: Noctuidae) and Spodoptera litura (Fabricius) in tobaccoÂ fields. However, few studiesÂ have recordedÂ the biological characteristics and effects of temperature on the development of this natural predator. We observed the biological characteristicsÂ and the effect of temperature on the development of immature and adult H. fuscipes predators at 15, 20, 25, 30, and 35Â°C with 60% relative humidity and a 16:8 L:D photoperiod on a diet of S. litura larvae. The results revealed twoÂ 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 30Â°C. Temperatures in the range of 15-35Â°C had no effect on oviposition period, but the adults could not lay eggs normally at 15Â°C.
Our findings indicate that the biological traits and the differences in development and reproductionÂ 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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