果树常见的自然灾害及对策一、冻害：果树越冬时，各组织、器官对低温的抵抗力不一样，有时枝、芽局部受冻，当年减产，严重时则整株枯死，对生产威胁很大。受冻后，花芽内部变褐或不萌发，枝条皮层枯死下陷，主干皮层纵裂，根颈变褐腐烂。造成冻害的原因复杂，生产上应采... Fruit trees common natural disasters and countermeasures First, the frost damage: Fruit trees overwinter, the organizations, organs of low temperature resistance is not the same, and sometimes branches, buds local frost, then cut, serious when the whole plant died, the threat of production . After being frozen, the flower buds are brown or non-germinated, the branch cortices withered and sunk, the main cortical longitudinal cracks and the root neck brown and rotten. Caused by the complex causes of frost damage, production should be taken ...