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1.本研究已基本摸清玉林地区柑桔红蜘蛛的天敌种类及天敌的消长情况。不同的天敌种类的发生期和发生数量,亦有所不同。钝绥螨较其它种天敌的发生量大,其中以3月下旬至4月上旬、5月中旬至8月上旬的发生数量较多,其分布广,而均匀。食螨瓢虫(学名待定)一年均有发生,在红蜘蛛发生量大的月份,食螨瓢虫也有一定的发生量。 2.主要天敌的捕食情况:果园中发生的几种钝绥螨,发生数量较多的是真桑钝绥螨和纽氏钝绥螨。但根据我们观察两者的平均日食量,多者不超过2.33头,与外地资料报导的食量差异大。食螨瓢虫的成虫、幼虫平均每天能捕食红蜘蛛成若螨40头左右,捕食卵80多粒。食
1. The study has basically found out the natural enemy species and natural enemies of citrus red spider in Yulin area. The occurrence and occurrence of different types of natural enemies are also different. Amblyseius amblysens than other species of natural enemies occur in large quantities, of which in late March to early April, mid-May to early August the occurrence of a large number, its wide distribution, and uniform. Food mites ladybug (scientific name to be determined) have occurred throughout the year, the incidence of spider mites in the month, the food mites ladybug also have a certain amount. 2. Prey predation of the main natural enemies: Several Amblyseius mites occurred in the orchard, the number of occurrence is more true Morus amblyseius and Newius amblyseius. However, according to our observation of the average eclipse volume of both, no more than 2.33 head, with large differences in appetite reported by field data. Adult mites ladybug adults, larvae can predate on average daily mites spider mite 40, prey on more than 80 eggs. food