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- 저자 : Men Xingyuan (검색결과 2 건)
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Wang Guifeng,Dong Zhaoke,Li Lili,Lu Zengbin,Li Chao,Men Xingyuan 한국곤충학회 2021 Entomological Research Vol.51 No.10
In field crop systems, biocontrol efficiency supported by various predators is not always enhanced with occurring simultaneously but can be reduced by predator interference, i.e., competition between predator individuals over access to their prey. Such interference may be related to the active time of each predator. In this study, predator exclusion experiments were used to selectively exclude either one or both predators and to examine the impact of the two predator groups on the suppression of cotton aphid (Aphis gossypii Glover) populations in a cotton field. Main predator species included Propylaea japonica (Thunberg) and Harmonia axyridis Pallas in the ladybird group, and Lycosa spp. and Erigone spp in the spider group. A greater number of spiders was observed in the morning and evening, while ladybird densities did not vary during the day. Removing all predators led to an increase in aphid numbers compared to the other treatments where predators were present. Removing either spiders or ladybirds had similar impacts on aphid control. It is likely that spiders provide an equal level of aphid mortality as ladybirds. When both spiders and ladybirds were present, aphid abundance did not differ from those treatments where only one predator group was present. The presence of both predators did not lead to more aphid suppression, indicating that interference between these predators may have occurred in the cotton field. Although these two predators partly diverged in their activity rhythms, interference may still have occurred and could be common in cotton fields.
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Lyu Zhaoyun,Liu Haigang,Zhou Ting,Feng Min,Lu Zengbin,Nie Lei,Wang Guiping,Wang Guangzhao,Li Lili,Men Xingyuan,Sun Meng,Yu Yi 한국응용곤충학회 2024 Journal of Asia-Pacific Entomology Vol.27 No.1
The solitary mason bee Osmia excavata Alfken (Hymenoptera: Megachilidae) is an important pollinator of fruit trees in northern China. This stduy compared and studied the flight ability of O. excavata at different temper atures both during and post diapause, with the aim of exploring the feasibility of using O. excavata prematurely released from diapause for pollination. The flight capacity of male and female O. excavata during diapause and post diapause was measured at 3 ◦ C intervals from 10 to 31 ◦ C by using a computer-monitored flight-mill system. The results showed that as the temperature increased, the flight ability also increased until an optimal tem perature was reached, whereupon it gradually decreased regardless of the further increase in temperature. Temperature had a highly significant impact on flight ability (P < 0.01), whereas gender only had a significant effect on average flight distance (P = 0.034). Diapause status had significant effects on average flight distance, average flight speed and maximum flight speed, and the interaction between diapause and temperature had a highly significant impact on average flight distance and average flight speed (P < 0.01). Post diapause, the flying ability of bees was significantly improved; however, diapausing O. excavata demonstrated a sufficient flying ability and so could be used as auxiliary pollinators for fruits in greenhouses during winter and early spring, when there is a shortage of pollinators.
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