柑桔木虱生物学特性及防治研究

STUDY ON THE BIOLOGY AND CONTROL OF CITRUS PSYLLA

柑桔木虱雌成虫必须选择寄主嫩梢产卵的特性与年发生代数关系密切。其嗜好寄生九里香,九里香年抽梢次数比柑桔多,在九里香上1年可能发生9—11代,在柑桔上可能发生6—7代(福州地区)。春夏秋季(旬严均气温分别为19.6℃、28℃和24℃)最长与平均成虫寿命及世代历期分别为98天、40天和52—59天;59天、32天和18—22天;65天、30天和25—30天。越冬成虫寿命长达260天。若虫和成虫的致死“温/时”分别为—3℃/小时和—10℃/小时。40％氧化乐果的800—1000倍液对木虱有特效,专性杀螨剂托尔克和普特丹对木虱无兼治作用。

There is close relationship between the yearly generation number of citrus psylla Diaphorina din Kuw. and the behavior of female that it is necessary to laid eggs on tender twigs of host. This psylla can complete 9- 11 generations on Murraya panculata and 6 - 7 generations on citrus a year in Fuzhou Area,due to the more sprouting times of former than that of latter. The longest and mean life span of adults and the duration of its generation in spring,summer and autumn are 98 10 and 53-59;59,32 and 18 - 22; and 65,30 and 25 - 30 days, respectively. The life span of overwintering adult is up to 260 days. The lethal temperature/time of nymph and adult are -3℃/.In and - 10℃/In. Spraying of 1:800-1000 40% omathoate got excellent control effect, while miticides such as plictran and torque are ineffective against this psylla.