Cucumber seedlings in spring season are in the low temperature season, and melon seedlings often have missing growth points. This kind of cucumber is a residual seedling, which has no production value and cannot be used. First, the cause of the occurrence of 1. Seeding with Chen seeds. The effective period of use of cucumber seeds is 3 years. Seeds that have been stored for more than 3 years are used to sow seedlings. Because there is not enough nutrient in the seeds, there are relatively many melon shoots without growth points. 2. When the seedling stage encounters a low temperature and the seedlings are subjected to cold injury or cold injury, the growth point is easily frozen and is missing. 3. Fatty or phytotoxicity. The newly emerged seedlings have a younger growing point. At this time, if the foliar spraying of pesticides or fertilizers is too high or the amount is too large, the growing points are vulnerable to damage and stop growing. Second, prevention measures 1. Seeding with new seeds as much as possible. 2. Strengthen the work of insulation and cold-proof at the seedling stage to prevent frost and cold damage. 3. When the top-dressing foliage is sprayed or sprayed, it must be used in strict accordance with the use concentration, the amount used, and the method of use.
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