河北省甘薯主产区蛴螬的发生为害调查

Survey on the Occurrence and Damage of White Grub in Main Producing Areas of Sweetpotato of Hebei Province

2010-2012年对河北省甘薯主产区易县和雄县甘薯田蛴螬的发生和为害状况进行了调查。结果表明：蛴螬在易县和雄县甘薯田普遍发生,主要种类为暗黑鳃金龟、铜绿丽金龟、黄褐丽金龟、华北大黑鳃金龟,一般地块蛴螬对甘薯的为害率20%,最高可达49.1%。易县暗黑鳃金龟成虫的发生高峰期为7月,铜绿丽金龟成虫的发生高峰期为6月下旬-7月下旬,黄褐丽金龟成虫的发生高峰期为6月下旬-7月上旬。

The occurrence and the damage of white grub in sweetpotato field in Yixian and Xiongxian of Hebei Province were investigated during 2010 to 2012. The results showed that the white grub was widely distributed. The major species of white grub included Holotrichia parallela,Anomala corpulenta,H. oblita and A. exoleta. The incidence of sweetpotato roots damaged by white grub was lower than 10% normally,but it might exceed over 20% in a seriously damaged field,and even reached to 49.1%. The peak period for H. parallela was in mid to late of July,while they were in late of June to late of July and in late of June to early of July for A. corpulenta and A. exoleta, respectively, base on the numbers of adults trapped by black-light lamp in Yixian.