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为明确加州新小绥螨Neoseiulus californicus(McGregor)对土耳其斯坦叶螨Tetranychus turkestani(Ugarov et Nikolski)的捕食潜力,采用捕食功能反应方法,研究了加州新小绥螨对土耳其斯坦叶螨各螨态的捕食作用。加州新小绥螨对雌成螨、若螨、卵的选择性捕食系数分别为0.44、1.25和1.35。在不同温度条件下,加州新小绥螨对土耳其斯坦叶螨的功能反应均属于Holling-Ⅱ型;28℃时捕食能力最强,对土耳其斯坦叶螨雌成螨、若螨和卵的攻击系数分别是0.6279、0.7203和0.7554,最大日捕食量分别为10.81头、28.49头和40.82粒。在相同温度下,加州新小绥螨雌成螨寻找效应随着猎物密度的增加而降低;在相同密度下,寻找效应随温度的升高先增加后减小,在28℃时寻找效应最高,为0.535。加州新小绥螨的捕食作用存在较强的种内干扰作用(m=0.520),随着捕食者密度的增大,平均捕食量逐渐减少,捕食作用率也相应降低。研究表明加州新小绥螨对土耳其斯坦叶螨具有很好的控制潜力。
In order to understand the predatory potential of Neoseiulus californicus (McGregor) in California, Tetranychus turkestani (Ugarov et Nikolski), a predation-functional response method was used to study the effects of Neospora californicus Predation. The selective predation coefficients of Neospora californica to female adult mites and nymphs were 0.44, 1.25 and 1.35, respectively. At different temperatures, the functional response of Neospora fritillary to Tetranychus turkestani was Holling-Ⅱ; the predation ability of Caesalpinus turcz was the strongest at 28 ℃, and the attack coefficient against female Tetranychus urticae, Respectively 0.6279,0.7203 and 0.7554, the maximum daily food intake was 10.81, 28.49 and 40.82 respectively. At the same temperature, the search effect of adult mites in Neosatsuria decreased with the increase of prey density. At the same density, the search effect increased first and then decreased with the increase of temperature, and the search effect was the highest at 28 ℃, Is 0.535. There was a strong intraspecific interference in the predation of Neospora spp. (M = 0.520). With the increase of predator density, the average prey decreased and the prey function decreased accordingly. Studies have shown that Neospora californica has good control potential for Tetranychus turkestani.