柑橘矢坚蚧的发生规律及防治技术

为了有效地防治和控制柑橘矢坚蚧对柑橘的危害,连续4年(2007~2010)对柑橘矢坚蚧的发生规律进行调查,并进行药剂防治试验.结果表明:柑橘矢坚蚧在柑橘产区普遍发生.一年发生3代,卵产于母体下,初孵化若虫从爬出母壳在1~3 h内分散转移到枝、叶、果上固着寄生,刺吸其汁液,若虫期发生期分别为5月上旬~6月中旬、7月上旬~8月下旬和9月中旬~11月上旬,时期为28~44 d以上;雌成虫介壳黄褐色或棕色,成虫期长达31~180 d,单雌卵量75~295粒;雄蚧体长形,粉白色,棉絮状.以第1代发生最为整齐,以雌雄成虫形态越冬为主,也有少部分以二龄若虫形态越冬,导致植株生长势衰弱、甚至死亡.分析其矢坚蚧暴发的主要原因是管理粗放和防治病虫害不力.防治柑橘矢坚蚧应结合影响该虫的发生因素,采用综合防治技术进行防治和控制.

Occurrence regulation and control measures of Unaspis yanonensis kuwans

In order to effectively prevent and control the harm of Unaspis yanonensis kuwans to citrus, the occurrence regulation of Unaspis yanonensis kuwans was investigated for four consecutive years （2007-2010） , and the pesticide control tests were done. The results show that Unaspis yanonensis kuwans occurs popularly in citrus region. It occurs 3 generations a year. The nymphs transfer to branch, leaf and fruit after crawling out from mother shell in 1-3 hours, and suck their juices. The larva stage of more than 28-44 d is from early May to the middle of June, from the beginning of July to the end of August, from the middle of September to the early of November, respectively. Tawny or brown female adult live for 31-180 days, and spawn 75-295 eggs. The shape of male adult is long. The first generation occurs most nearly. Most of Unaspis yanonens/s kuwans live through the winter as adult form, a few as two instar nymphs, resulting in overwintering plant growth debilitating and even death. The main reasons are inefficient management and prevention of diseases and insect pests effectively. The influence factors should be considered to prevent Unaspis yanonens/s kuwans comprehensively.