大多数梨品种自花不实,特别是一些老梨园品种单一,缺乏适宜的授粉树,常授粉受精不良,产量较低,再加之近几年来,连年使用化学农药,昆虫数目大为减少,若遇花期冷风,阴雨连绵等不良气候,几乎无收。采用人工固体花粉点授,既费力而效果差,且梨树花期仅2—3天,使大面积人工辅助授粉受到限制。针对这一问题,1986年我们对5000 Most pear varieties are self-inflicted. In particular, some old pear varieties have a single species, lack of appropriate pollination trees, and often poor pollination and poor yields. In addition, in recent years, the number of insecticides has been greatly reduced in recent years. When the flowering cold, rain and other bad weather, almost no income. The use of artificial solid pollen point grant, both laborious and poor results, and pear flowers only 2-3 days, so that a large area of ​​artificial pollination is limited. In response to this problem, in 1986 we were 5000