果树花期注意防冻害果树花芽冻害，多在冬季或早春季节发生。尤其是早春霜冻。表现为中心花坏死或整个花原始体坏死，或整个花序坏死，有时也会出现畸形花。受害轻的，虽能正常开花坐果，但其花的构造不一定完全而易产生畸形果，影响果树的经济产量；重的则化朵不开或开花... Fruit trees pay attention to frost damage fruit flower bud frost damage, and more in winter or early spring occurs. Especially in early spring frost. The performance of central flower necrosis or the entire flower primitive necrosis, or necrosis of the entire inflorescence, sometimes deformed flowers appear. Light damage, although the normal flowering fruit, but its flower structure may not be completely and easy to produce deformed fruit, affecting the economic output of fruit trees;