甘肃、宁夏苹果病虫害的发生及防治
Fruit Growers' Friend(2019)
Abstract
通过对甘肃静宁县、庄浪县、宁夏中卫市等西北黄土高原苹果种植区域走访调查发现,这一区域降水量少,年降水量200~300毫米,空气干燥,苹果果实病害轻,但是枝干和叶片病害如腐烂病、小叶病和黄叶病等多有发生,虫害表现较轻.多数果农一年打四五次药,春天的干枝药不打,花后打一次,套袋前打一次,套完袋打两三次.管理好的果园一年打六七次药,粗放的只打三次药.不少果园由于病虫害防治不当,严重影响了苹果产量和果实品质的提高,造成生产效益不高.
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