What are the key technical points for autumn cucumber planting and management?
How should cucumbers be managed when planted in autumn? The main aspects of autumn cucumber management that can be referenced are as follows: 1. Scientifically plan fertilizer and water application. After the root cucumber is harvested, apply a topdressing once in a timely manner along with watering. After autumn cucumbers enter the full fruiting stage, generally water once every 3 to 4 days. Use small amounts of water and water frequently, avoiding flood irrigation. In this way...
How should cucumbers be managed when planted in autumn? Please explain.
The main aspects of autumn cucumber management that can be referenced are as follows:
1. Scientifically plan fertilizer and water application. After the root cucumber is harvested, apply a topdressing once in a timely manner along with watering. After autumn cucumbers enter the full fruiting stage, generally water once every 3 to 4 days. Use small amounts of water and water frequently, avoiding flood irrigation. This can not only prevent drought and waterlogging and reduce pests and diseases, but also lower the temperature and improve the field microclimate. Usually, after each watering with clear water, apply one topdressing. Use 15 to 20 kg of urea per mu, with an appropriate application of quick-acting phosphorus and potassium fertilizers. If rainstorm weather occurs, pay attention to drainage, and water promptly after the rainstorm. After each heavy rain, carry out one shallow cultivation along with weeding. After entering the full fruiting stage, no more intertillage weeding is done. Generally, harvest once every 1 to 2 days.
2. Pay attention to cold protection and warmth retention. September is during the "White Dew" and "Autumn Equinox" solar terms. The weather turns from hot to cool, and the temperature drops greatly at night, so warmth retention and cold protection should be strengthened. In early September, autumn cucumbers are still in the full fruiting stage. Set up several rows of windbreaks in the cucumber field, and set up surrounding barriers on the north and west sides of the field edge to reduce the impact of strong winds and prevent premature aging of the plants. At the same time, spray a 0.5% potassium dihydrogen phosphate foliar fertilizer solution, which can extend the harvest period and increase later-stage yield. In mid- and late September, autumn cucumbers enter the late fruiting stage, and the frequency of watering should be reduced accordingly.
3. Timely prevent and control pests and diseases. Cucumber downy mildew can be controlled by spraying 58% metalaxyl-mancozeb at 500 times, DuPont Kocide at 600 times, 64% dimethomorph at 800 times, or 75% chlorothalonil. Pests mainly include greenhouse whitefly, aphids, leafminers, tea yellow mites, etc., and can be sprayed with Actara 5000 times solution plus Kung Fu Xiao Zi emulsifiable concentrate at 2000 to 3000 times solution. Spray once every 7 days to achieve control effects.
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