论文部分内容阅读
湖北长阳县都正湾镇刘书奇读者问:我家嫁接的十多株优质大梨树,结的果又大又甜,近两年仍然花盛果丰,可是在果实膨大期,叶上生黄色斑点,不几天就在叶片的反面长出黄色的刺,再过些时,叶片变黑枯落,梨子也掉光了。不知该如何防治?湖北省农科院果树专家徐宏汉答复如下:从以上描述的
Liu Changqi, Dujiangyuan Town, Changyang County, Hubei Readers Q: More than a dozen high-quality pear trees are grafted in our house. The fruit is big and sweet. In the past two years, flowers still flourish. However, when the fruit is swollen, A few days on the opposite side of the leaves grow yellow thorns, and then some more, the leaves dark brown, pear also fell out. I do not know how to prevent? Hubei Academy of Agricultural Sciences fruit expert Xu Honghan reply as follows: From the above description