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The temperature of autumn cucumber is high in the early stage of growth, and it is prone to problems such as long length and high melon position. In the late growth stage, the temperature is low, and the environment of low temperature and high humidity often causes diseases such as downy mildew, sclerotinia and bacterial angular spot. Therefore, autumn cucumbers must be managed in stages according to weather changes.
In the early stage, the temperature is high, coupled with the recent rainy weather, the high temperature and high humidity environment is likely to cause the seedlings to grow up, and the flowering and melon nodes are postponed. Therefore, the management direction should be “controlled†– temperature control and water control.
Its purpose is to control vegetative growth. Temperature control should be reduced by ventilation, reducing the temperature inside the shed, especially the night temperature, widening the temperature difference between day and night, reducing respiratory consumption. Control water, reduce watering and watering in time, and promote deep rooting to enhance the plant's resistance to stress.
In addition, hormones can also be used to control plant growth. In the true leaf stage of cucumber 3, it can be sprayed with 750 times of auxin or 1500 times of chlormequat; it can also be sprayed with 130-150 mg/kg of ethephon. Spraying again after 7 days can inhibit the growth of plants and promote the formation of female flowers.
In the mid-term, the autumn is high and the environment is suitable, which is the peak period of autumn cucumber production. Therefore, the management direction is “promoting†– promoting melons and promoting trees.
The main means is timely watering and fertilizing. After the root melon is picked, combined with watering, the fertilizer is applied once in a timely manner. The fertilizer should be fertilized according to the principle of promoting roots, promoting trees and promoting fruit weight. It can be applied with biological bacterial fertilizer (such as Dayuanxin fast gunner) with all-water-soluble quick-acting fertilizer (such as Fangrun); it can also be applied by using Ruishen compound biological fertilizer and mixed with potassium sulfate compound fertilizer. However, it should be noted that the amount of fertilizer should not be too large. Generally, the biological bacterial fertilizer is used for 80 kg per acre, and the compound fertilizer is used for 40 kg or aroma of 10 kg.
After entering the melon period, generally water is poured once every 3-4 days, and the fertilizer is applied once, and the amount of fertilizer should be increased appropriately. The fertilizer can be used for 100 kg of mu and the compound fertilizer can be used for 60 kg to fully guarantee the plant. And the normal growth and development of melons.
In the later stage, the temperature is lowered. Under the premise of keeping warm and cold, pay attention to the disease and avoid the flooding affecting the increase of autumn cucumber yield. At the same time, avoid the root cause of laying down the vegetables. Therefore, the management direction should be “anti- "- Cold and disease prevention.
Cold-proof, on the basis of timely sealing and closing the wind insulation, it can also spray 300 times of urea solution with 200 times of potassium dihydrogen phosphate solution to enhance the cold resistance of cucumber and prevent premature aging of plants.
Disease prevention, focusing on downy mildew, brown spot, sclerotinia and bacterial angular spot. The measure is environmental regulation and coordination with pharmaceutical control. Environmental regulation needs to be based on the biological characteristics of cucumber, and will not be discussed in detail here. Chemical control should pay attention to safe medication, alternate use of drugs, to avoid the occurrence of phytotoxicity and bacterial resistance. Such as downy mildew can be used Plucker, Jin Lei, enoylmorpholine, anti-fast net, etc.; brown spot disease can be mixed with methyl thiophanate, or carbendazim mixed with rot, etc.; , Nong Liling, Shi Jiale, etc.; bacterial keratosis can be streptomycin, quinoline copper, acacia copper and so on.
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