Effects of Light, Temperature, and Space on the Development of Dryinus sinicus Larvae

doi:10.16409/j.cnki.2095-039x.2024.07.011

Abstract

Abstract: Dryinus sinicus is a dominant parasitic wasp of Lycorma delicatula nymphs, an important insect pest in agricultural and forest ecosystems. In order to address the low cocooning and survival rates in the artificial rearing of D. sinicus, the effects of different rearing conditions on the development of D. sinicus larvae were determined for, selecting optimum indoor rearing methods. The 2^nd― 3^rd instar nymphs of L. delicatula were used as hosts in this study. The effects of different temperature, photoperiod, and container sizes on the survival and cocooning rates of D. sinicus larvae were determined, and the larvae preference for cocooning substrates and position were also examined. The results showed that the developmental period of D. sinicus larvae decreased as the temperature increased. The highest survival and cocooning rates of D. sinicus larvae were observed at a temperature of 25 ℃ and a photoperiod of 16L:8D, both are 73.3%. The survival and cocooning rates of D. sinicus larvae increased with larger rearing container space, and the highest rates were obtained in the cage of size 25 cm×25 cm×25 cm, with a survival rate of 96.0% and a cocooning rate of 92.7%. The study also found that D. sinicus larvae showed a preference for rough cocooning substrates and positions with angles. These findings are helpful to the artificial production of D. sinicus in laboratory.

Key words: Lycorma delicatula, Dryinus sinicus, rearing, development

CLC Number:

S476.3

FAN Mengxi, BAO Kexin, ZHUANG Yutong, WANG Xiaoyi. Effects of Light, Temperature, and Space on the Development of Dryinus sinicus Larvae[J]. Chinese Journal of Biological Control, 2025, 41(2): 291-298.

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