梨铁象(Styanax apicatus Heller)是我国南方梨树的一种毁灭性害虫,在广西部分梨产区严重发生,造成树龄缩短,产量品质下降和整株枯死。以品质佳良著称的灌阳雪梨,因该虫为害,每年都有大批植株死亡。据1977年在灌阳县红旗公社大仁四队调查,6年生以上结果树,被害株率100%,其中严重被害的占52%,枯死或即将枯死的 Stylosax nematodes (Styanax apicatus Heller) is a devastating pest of pear tree in southern China, which occurred seriously in some pear-producing areas in Guangxi, resulting in shortened tree ages, decreased yield and quality and withered plants. Guanyang Sydney, known for its good quality, has a large number of plant deaths every year because of the pests. According to a survey conducted by Daren 4 teams in Hongqi commune, Guanyang County in 1977, the result trees over 6 years old have a rate of 100% victimization, of which 52% are severely victimized, who are dead or about to die