陕西商洛地区桔梗根结线虫发生规律与防治试验

Study on the occurence and prevention of root knot nematode of balloon flower in Shangluo,Shaanxi

对陕西商洛地区桔梗根结线虫（Meloidogyne halpa Chitwood）发病率及其生活环境和为害程度进行了调查，并采用化学药剂和植物粉剂对桔梗根结线虫进行了防治研究。结果表明,桔梗根结线虫在陕西商洛地区普遍发生，有虫株率为6．45%-44．6％。其主要生活在砂壤地中；化学药剂对桔梗根结线虫的防治效果优于植物粉剂。

The occurence rate of root knot nematale of ballon flower and its living surroundings and the harm it does in Shangluo, Shaanxi were investigated. Results show that root knot nematode of balloon flower,mainly living in sandy soil,is widespread in Shangluo,Shaanxi,with 6.45% to 44.6% plants infected. But chemical medicament produces better controlling results on it than plant powder.