论文部分内容阅读
板栗受桃蛀螟的危害十分严重,受害率可达29%。用40%氧化乐果3倍液于8月中旬涂干,防治效果达76.5%以上,防治成本为34.8元/hm ̄2,净增板栗77.5kg/hm ̄2。
Chestnut borer borer is very harmful, the damage rate of up to 29%. With 40% omethoate 3 times in mid-August Tugan, prevention and control of more than 76.5%, prevention and control costs of 34.8 yuan / hm ~ 2, a net increase of chestnut 77.5kg / hm ~