摘要
本文从天敌与猎物的种群内禀增长力,天敌对猎物不同密度的功能反应及数值反应三个方面来评价和比较纽氏钝绥螨、尼氏钝绥螨时其猎物——枯全爪螨的控制作用。在五种温度下,两种捕食螨的种群内禀增长力都大于桔全爪螨。它们对猎物的功能反应属HollingⅡ型。尼氏钝绥螨的捕食量大于纽氏钝绥螨,在25℃时两种捕食螨捕食量最大,应用Rogers的模型能较好地对试验结果进行模拟。尼氏钝绥螨对桔全爪不同虫态的取食不存在选择效应,纽氏钝绥螨则嗜食若螨和幼螨。两种捕食螨对桔全爪螨的数值反应表明,仅供给桔全爪螨雌成螨作为食物,对两种捕食螨都不利,尤其对尼氏钝绥螨更为明显。综上所述,两种捕食螨能比较有效地控制桔全爪螨种群,当猎物密度较高时,尼氏钝绥螨控制效果优于纽氏钝绥螨,但纽氏钝绥螨控制效果优于纽氏钝绥螨,但纽氏钝绥螨田间种群数量比尼氏钝绥螨稳定。柑桔园中存在其它补充食物时对这两种捕食敌有利。
This paper tries to evaluate and compare the effectiveness of two species of predacious phytoseiid mites, Amblyseius newsami and A. nicholsi, in controlling their prey population-Panonychus citri from three aspects:The intrinsic rates of population natural increase of the three species of mites, the functional and numerical response of two species of predacious mites to the density of the prey. The results show that the two species of predacious mites are able to control theprey population effectively. A. nicholsi can reduce the prey populations to low levels more rapidly than A. newsami when the density of prey population is high. The population of A.newsami may be more stable than A. nicholsi in orchards. The result of controlling by A.newsami may be better than A. nicholsi when the prey population mainly consists of larvae and nymph. The existence of other alternate foods in citrus orchards is of benefit to the predacious mites.
出处
《生态学报》
CAS
CSCD
北大核心
1989年第2期174-181,共8页
Acta Ecologica Sinica
基金
中国科学院科学基金
关键词
钝绥螨
桔全爪螨
生态学
天敌
Amblyseius newsami, A.nicholsi, natural enemy, prey.
