1.内疗素的防病效果由于苹果和梨树腐烂病的为害,一些果园不仅严重减产,而且果树大量死亡,甚至全园毁灭。北票县小塔子公社虎爪大队果园最初有20年生苹果树700多裸,因腐烂病为害只3、4年时间几乎全部死掉。 1. Endophytic disease prevention effect As the apple and pear tree rot disease, some orchards not only severely cut down, but also a large number of fruit trees died, or even the whole park destroyed. Beipiao County small pagoda commune Hu clan brigade orchard initially 20-year-old apple trees more than 700 nude, due to rot disease only 3, 4 years almost all died.