Biological performance of the predatory mite Neoseiulus barkeri Hughes (Phytoseiidae): a candidate for controlling of three mite species infesting grape trees

M. Al-Azzazy
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引用次数: 2

Abstract

The life history and predation rate of Neoseiulus barkeri (Phytoseiidae) feeding on Colomerus vitis (Eriophyidae), Tetranychus urticae (Tetranychidae) and Brevipalpus lewisi (Tenuipalpidae) were determined in the laboratory at constant temperatures of 25, 30 and 35 °C, relative humidity of 50 ± 5 % and a photoperiod of 16:8 h (light:dark). Within the temperature range studied, the increase of temperature from 25-35 °C led to a shortened development period and an increased total predation rate and reproduction. Survival during immature stages development surpassed 94 % at all the temperatures from 25 to 35 °C. The highest fecundity (59.50, 48.25 and 35.30 eggs per female) was recorded at 35 °C, while the minimum (40.25, 31.00 and 20.50 eggs per female) was at 25 °C when N. barkeri fed on C. vitis, T. urticae and B. lewisi, respectively. It is demonstrated in the life table parameters that when the predatory mite N. barkeri is fed on C. vitis, the highest reproduction rates (rm = 0.195, 0.210 and 0.232 females/female/day) are obtained, while feeding on B. lewisi gave the minimum of reproduction rates (rm = 0.095, 0.105 and 0.115) at 25 °C, 30 °C and 35 °C, respectively. The population of N. barkeri multiplied 20.45, 22.63 and 24.89 times in a generation time of 16.80, 14.75 and 12.50 days when fed on C. vitis at the same temperatures mentioned above, respectively, while N. barkeri multiplied 10.70, 12.88 and 14.36 times in a generation time of 23.20, 21.11 and 18.08 days when fed on B. lewisi at the same temperatures, respectively. This shows that N. barkeri is a promising control agent for C. vitis, T. urticae and B. lewisi on grape trees.
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巴氏新绥螨(植物绥螨科)对葡萄树上三种螨的生物学性能研究
在恒温25℃、30℃和35℃,相对湿度50±5%,光照周期16:8 h(明暗)的条件下,测定了巴氏新绥螨(植物绥螨科)摄食绿蛾、荨麻叶螨(叶螨科)和柳氏短喙螨(栉螨科)的生活史和捕食率。在研究的温度范围内,温度升高25 ~ 35℃,导致发育周期缩短,总捕食率和繁殖率增加。在25 ~ 35℃的所有温度下,未成熟期的成活率均超过94%。在35℃条件下,barkeri N. vitis、T. urticae和B. lewisi的产卵量最高,分别为59.50、48.25和35.30个卵,最低,分别为40.25、31.00和20.50个卵。从生命表参数中可以发现,在25℃、30℃和35℃条件下,捕食螨barkeri在葡萄球菌上的繁殖率最高,分别为0.195、0.210和0.232只/只/d,而捕食螨lewisi的繁殖率最低,分别为0.095、0.105和0.115只/d。在相同温度下取食葡萄球菌时,巴氏易僵螨在16.80、14.75和12.50 d的世代内分别繁殖20.45、22.63和24.89倍;在相同温度下取食刘易斯白僵螨时,巴氏易僵螨在23.20、21.11和18.08 d的世代内繁殖10.70、12.88和14.36倍。这表明巴氏奈瑟菌是防治葡萄树上葡萄球菌、荨麻疹和刘易斯白僵菌的有效药剂。
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