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4月中下旬当枣树萌芽时,刚长出的嫩芽就会被枣步曲吃掉;当枣树展叶开花后,因幼虫虫龄长大,食量大增,常将叶片吃成大大小小的缺刻,严重发生时能将全树叶片及花蕾吃光,不仅当年没产量,还影响到来年的坐果率。1.挖蛹3月中旬以前,在树干周围直径1米内挖深15厘米寻找冬蛹,并捡拾到园外集中消灭。此项工作可结合翻树盘同时进行。
In late April when the jujube sprout, just grow the bud will be eaten jujube; when the jujube leaf after flowering, due to larvae grow up, food intake increased, often eat leaves into large The small size of the nick, can occur when the full tree leaves and buds, not only did not produce the year, but also affect the rate of fruit set next year. 1. Pupae pupa Before mid-March, dig a depth of 15 centimeters in a diameter of 1 meter around the trunk to find a winter pupa and pick it up outside the park to concentrate it away. This work can be combined with turning the tree tray at the same time.