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一、发生为害情况 自1994年开始,广东棕榈园林公司棕榈场先后通过厦门及台湾商人处购入海枣、台湾枣和银海枣(伊拉克枣)等共4批200多株1—5米高的大苗。因“竹虫”为害死亡及被挖掉的共7株,首株死树发生在1996年,其余均在1997年相继出现死树,经对死树进行剖检,发现被害株一株里面有活虫由数头至百余头不等,最多的一株有幼虫、蛹及成虫共123头。还有部份长势不好的植株可能已受感染。 在现场对虫害株进行调查,在1株银海枣树干
First, the occurrence of damage Since 1994, palm garden in Guangdong Palm Garden Company has purchased through the Xiamen and Taiwan merchants Jujube, Taiwan jujube and silver date (Iraq dates) and a total of more than 200 plants and more than 1-5 meters high 1-5 meters Big seedlings As a result of “bamboo worm” killed and was dredged a total of 7 strains, the first dead tree occurred in 1996, the rest were dead in 1997, dead trees, dead necropsy and found that the victim strain inside a Live worms from a few heads to a hundred head range, the largest of a larvae, pupae and adults a total of 123 heads. And some of the plants that have not grown well may already be infected. In the field of insect pests were investigated in a silver jujube tree trunk