柑桔黑刺粉虱发生规律及防治

对柑桔黑刺粉虱的生活习性，发生规律，有效积温，天敌种类和药剂防治等进行了比较系统的研究，该虫在广东一般１年发生５代，第１代成虫出现份，１１月下旬以后若虫和蛹开始越冬，发育起点温度为１１．０１℃，完成了１个世代所需有效积温为７９１．２７日度。

STUDIES ON THE BIONOMICS AND CONTROL OF CITRUS SPINY WHITEFLY

The behavior, bionomics and control of citrus spiny whitefly Aleurocanthus spiniferus Quaintance were systematically investigated. The results showed that there are 5 generations of this insect pest per year in Guangdong Province, the adult of first generation occurs in March, and the nymphs and pupae overwinter since middle or late November. Its developmental zero was 11. 01 C , and effective temperature constant for one generation was 791. 27 day-degrees. Its main natural enemies were Chilocorus kuwanae Silvestri, Chrysopa spp. , spiders, predatory mites, Amitus kerperidum Sil-vestri and Prospaltella sp. . The single use of omethoate, optunal or methidathion, etc. was not satisfactory to keep this insect pest under control, the control effect of combined use of omethoate and optunal was somewhat better than their single use, and was much better (90. 93%) as putting a few emulsified machine oil into this combination, while the use of mixture B,32% of 40% omethoate 48% of 40% optunal 15% of 4. 5% a-cypermethrin 5% of synergist, got most desirable effect (97. 71%).