各地的向日葵螟比较严重,对产量的影响很大。国内外的经验是:药剂防治见效不大,最好采用抗螟品种。抗螟品种的瘦果皮壳中有一层黑色素层,可以阻止螟虫的蛀蚀。只要对种子进行鉴定,选出具有黑色素层的瘦果,通 Sunflower borers around more serious, a significant impact on the yield. Domestic and foreign experience is: Pharmacy is not effective, it is best to use anti-borer varieties. Anti-stem borer shellfish shell has a layer of melanin in the layer, can prevent stem borers decay. As long as the identification of the seeds, electing achene with melanin layer, pass