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矢尖蚧是我县柑桔主要害虫之一,但防治时间和部位较难掌握。为了摸清发生分布规律,探索防治的最佳时期和部位,笔者于1988～1989年连续两年在横龙垦殖场进行了调查研究,现将结果整理如下。 一、发生时期 柑桔矢尖蚧在我县一年发生三代,第一代发生整齐,第二、三代世代重叠,以受精雌成虫和雄虫蛹越冬。各世代发生期见表1。第一代:卵胚眼点初见日在4月下旬;
Cornucopiae is one of the major citrus pests in our county, but the prevention and treatment of time and parts more difficult to grasp. In order to find out the distribution rules and explore the best time and place for prevention and treatment, the author conducted a survey and study on Henglong Reclamation Farm for two consecutive years from 1988 to 1989. The results are summarized as follows. First, the occurrence of citrus vector Agrimony scale occurred in our county three generations a year, the first generation occurred neat, the second and third generations of generations overlap, to female adults and male fertilizers pupal wintering. Generations of each generation are shown in Table 1. The first generation: oocysts eyes first saw in late April;