梨树“上强下弱”形成的原因及预防解决措施

Reasons for Formation of "Upper Strong and Lower Weak" of Pear Trees and Preventive Measures

根据实践经验,对社旗县"上强下弱"梨树形成原因进行了分析和研究,提出了相应的预防和解决措施。

According to the practical experience of Sheqi county ＂upper strong and lower weak＂ pear causes are analyzed and put forward prevention and corresponding measures.