冀东地区花生田蛴螬优势种调查及田间防治技术研究

通过对冀东地区花生田蛴螬优势种和发生期的田间调查,明确了该地区花生田蛴螬的优势种为暗黑鳃金龟。同时进行了3%辛硫磷颗粒剂60 kg/hm2、30%毒死蜱微囊悬浮剂6 375 mL/hm2、3%呋喃丹颗粒剂60 kg/hm2、绿僵菌6亿个孢子/穴、绿僵菌4亿个孢子/穴＋30%毒死蜱微囊悬浮剂3 825 mL/hm2、绿僵菌4亿个孢子/穴＋30%毒死蜱微囊悬浮剂2 550 mL/hm2和清水对照共计7种药剂处理防治蛴螬的田间试验。结果表明：使用30%毒死蜱微囊悬浮剂6 375 mL/hm2防治效果最好,防效高达77.01%,花生受害指数仅为3.61%,花生产量为3 629.70 kg/hm2;绿僵菌4亿个孢子/穴＋30%毒死蜱微囊悬浮剂3 825 mL/hm2处理的综合防治效果次之,但用药量少,且毒性小。

Investigation of Dominant Species of White Grubs in Peanut Field and Field Control Techniques in the Eastern of Hebei Province

The dominant species and occurrence period of white grubs in peanut field in the Eastern of Hebei Province were investigated.The control effects of 3% phoxim pelletized granule 60 kg /hm2,30% chlorpyrifos CS 6 375 mL/hm2,3% furation pelletized granule 60 kg/hm2,Metarhizium anisopliae 600 million spores per hole,M.anisopliae 400 million spores per hole＋30% chlorpyrifos CS 3 825 mL/hm2,M.anisopliae 400 million spores per hole＋30% chlorpyrifos CS 2 550 mL/hm2 on white grubs were studied.The results showed that the dominant species was Holotrichia parallela Mltschulsky.The control effect could reach 77.01% by using 30% chlorpyrifos CS 6 375 mL/hm2,the damage index of peanut was only 3.61%,and the yield of peanut was 3 629.70 kg/hm2.The control effect of M.anisopliae 400 million spores per hole＋30% chlorpyrifos CS 3 825 mL/hm2 was followed,while lower dose of pesticide was used,and the toxicity was lower.