巴氏新小绥螨对芒果茶黄蓟马的功能反应研究

Functional Response of Neoseiulus barkeri to Scirtothrips dorsalis Hood of Mango

为明确巴氏新小绥螨(Neoseiulus barkeri Hughes)本研究对芒果上茶黄蓟马(Scirtothrips dorsalis Hood)的控害潜能,在室内温度(27±1)℃、RH (75±5)%的条件下,研究了不同虫态巴氏新小绥螨对茶黄蓟马的捕食效能,并通过其瞬时攻击率(a)、处理时间(Th)和捕食效能(a/Th)等参数进行综合评价。结果表明:巴氏新小绥螨对茶黄蓟马的成虫、1龄和2龄若虫均可取食,并具有一定的捕食能力。随着猎物密度的增加,捕食螨日取食量逐渐增加,其中巴氏新小绥螨雌成螨和第2若螨对茶黄蓟马1龄若虫的捕食效能最大,每日分别达10.35、12.82头,而雄成螨对茶黄蓟马2龄若虫的捕食效能最大,为每日12.48头。巴氏新小绥螨的雌成螨和雄成螨均对茶黄蓟马的2龄若虫表现出最强的瞬时攻击率,分别为1.0227和1.1208,第2若螨则对茶黄蓟马的雌成虫表现出最大攻击率,为1.5774。

In order to determine the damage control potential of Neoseiulus barkeri on Scirtothrips dorsalis Hood of mango, the predation ability of N. barkeri on S. dorsalis Hood of mango was observed under the conditions of temperature of(27±1)℃ and RH(75±5)% in the room. The predation efficiency of different insect states of N. barkeri on S. dorsalis Hood was comprehensively assessed by the instantaneous attack rate(a), handing time(Th), predationcapacity(a/Th) and other parameters. N. barkeri could feed on the adults, nymphs of the first and second age of S. dorsalis Hood, and had a certain predating ability. With the increase of prey density, the daily feeding amount of predatory mites increased gradually. Among them, the female adult mite and deutonymph mite had the largest predationcapacity to the nymph of the first age of S. dorsalis Hood(10.35 and 12.82 per day, respectively), while the male adult mite had the largest predationcapacity to the nymph of the second age of S. dorsalis Hood(12.48 per day). The female and male adult mites of Apterygium barbati showed the strongest instantaneous attack rate to the 2-year nymph of the S. dorsalis Hood(1.0227 and 1.1208, respectively), while the deutonymph mite showed the maximum instantaneous attack rate to the female adults of S. dorsalis Hood(1.5774).