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气象因素影响下蚜虫的状态反馈生物防治模型分析
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作者 黄明湛 刘守宗 张莹 《应用数学》 CSCD 北大核心 2022年第3期653-661,共9页
本文利用半连续动力系统构建一类带有气象因素影响和状态反馈脉冲控制的蚜虫生物治理模型.首先研究无控制系统和控制系统的动力学性质,包括平衡点及周期解的存在性、唯一性和稳定性,以及系统的吸引域.然后运用数值模拟的方法,一方面验... 本文利用半连续动力系统构建一类带有气象因素影响和状态反馈脉冲控制的蚜虫生物治理模型.首先研究无控制系统和控制系统的动力学性质,包括平衡点及周期解的存在性、唯一性和稳定性,以及系统的吸引域.然后运用数值模拟的方法,一方面验证理论结果的正确性,另一方面分析温度、湿度以及天敌释放量对两类种群发展以及蚜虫生物防治效果的影响. 展开更多
关键词 蚜虫生物防治 状态反馈控制 后继函数 阶1周期解
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THE ROLE OF COCCOPHAGUS SCUTELLARIS (HYMENOPTERA: APHELINIDAE) IN THE BIOLOGICAL CONTROL OF SOFT SCALE INSECTS (HOMOPTERA: COCCIDAE) IN EGYPT
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作者 Shaa ban AbdRabou 《Entomologia Sinica》 CSCD 2002年第3期39-44,共6页
Coccophagus scutellaris (Dalman) is one of the specific parasitoids that attack soft scale insects in Egypt. In the present study, C. scutellaris was reared from 6 species of soft scale insects. These are Cero... Coccophagus scutellaris (Dalman) is one of the specific parasitoids that attack soft scale insects in Egypt. In the present study, C. scutellaris was reared from 6 species of soft scale insects. These are Ceroplastes floridensis Comstock, Coccus hesperidum L., Pulvinaria floccifera (Westwood), P. psidii Maskell, Saissetia coffeae (Walker) and S. oleae (Oliver).The abundance of C. scutellaris was monitored from July to Nov. 1999-2000 in five localities in Egypt, the Beni Suef, Cairo, Giza, Gharbiya and the Northern coast. C. scutellaris is considered an effective parasitoid of S. coffeae and S. oleae with maximum parasitism rates reaching 26% and 22% in Nov. and Aug. 1999, respectively. 展开更多
关键词 Coccophagus scutellaris APHELINIDAE soft scales COCCIDAE BIOCONTROL
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