木麻黄皮暗斑螟的发生与综合防治技术研究

A STUDY ON THE OCCURENCE AND INTEGRATED MANAGEMENT OF EUZOPHERA BATANGENSIS

在１９８９—１９９３年，对沿海防护林木麻黄新害虫皮暗斑螟（ＥｕｚｏｐｈｅｒａｂａｔａｎｇｅｎｓｉｓＣａｒａｄｊａ）的发生及综合防治技术进行了试验研究，根据５１个不同的木麻黄地理种源的虫害率及生长情况，应用ＩＢＭ－ＰＣ计算机进行数据分析，发现Ｃ３８、Ｃ３９、Ｃ４４种源属绝抗类群。自然界有拟小腹茧蜂、蚂蚁等１０余种天敌。次暗斑螟幼虫多寄居在树干的２ｍ以下部位，郁闭度０．３、林龄２年以下林木虫害发生轻。通过８个昆虫病原斯氏线虫品系的侵染力测定，筛选出ＳｔｅｉｎｅｒｎｅｍａｆｅｌｔｉａｅＡｇｒｉｏｔｏｓ为最佳品系，林间喷洒２００条／ｍｌ线虫水液，死亡率为７２．０％在室内，新发现的白僵菌对害虫感染率为１００％；以不同施用方法比较得知，以白僵菌＋柴油＋清水混合液剂效果最好，林间喷雾效果为８６．１％。管氏肿腿蜂、ＳｃｌｅｒｏｄｅｒｍａｇｕａｎｉＸｉａｏｅｔＷｕ、苏云金杆菌、２０％杀灭菊酯等对它均有较好的防治效果。

A study on Euzophera batangensis Caradja was conducted in Fujiau province from 1989-1993. Euzophera batangensis Caradja is one of the primary pests damaging stem of Casuarina shelterbelt along the sea shore. The growth and resistance performance of 51 different geographical provenances of Casuarina spp. intraduced in 1987 and 1989 were investigated. The varianceanalysis showed that the ability of C38, C39, C44, to resist the pest was quite significant and they were the most resistant provenances. More than ten species of natural enemies of the borer were collected. If the crown density is over 0.3 or the age of stand is over 2 years, the tree could de hardly damaged. The comparison of infectivety of 8 steinernematid Steinernema feltiac Agriotos was the best one. Putting the nematode to water inthe ratio of 200 nematode juveniles to one ml of water and spraying the lipuid to the damaged sites of the tress in forest, a mortality of 72.0% could be obtained. The best way to use Beauveria bastiana to control the pest was to spray the mixture of Beauveria, diesel oil and water, the motality was from 86.1% to 100%.