优选前情况:每年4—9月当归长虫率很高,使其质和量都受到很大损失。优选方法:瞎子爬山法。优选过程:第1试点:反复日晒后仍生虫。第2试点:微温烘放时间稍长也生虫。第3试点:用瓦缸一个(缸口直径一米,高一米),缸内底部放石灰块2斤,上面隔一通气的隔板,板上放当归约100斤,在半年 Preferred Pre-condition: The annual rate of angelica longicornis from April to September is so high that the quality and quantity of the angelica bear a great loss. Preferred method: blind hill-climbing method. The preferred process: The first pilot: After repeated sun exposure worms. The second pilot: tepid release time also long worms. The third pilot: a tile cylinder (cylinder diameter of one meter, one meter high), put the bottom of the cylinder 2 kg of lime block, separated from the top of the diaphragm, put angelica on board about 100 pounds, in six months