The pollination time must be good. Due to the lack of pollinating insects in the shed, Qiuyu watermelon usually needs artificial pollination, and the pollination period is relatively concentrated. The watermelon corolla began to loosen around 5 am and pollen began to disperse at about 6 o'clock. The corolla was fully developed and by midday, the corolla became pale and began to close. From 8 to 10 am, it is the time when the stigma of female stigma and male pollen are most active, and this time is also the best time for pollination. Generally speaking, watermelon pollination completion time is appropriate for 7 days, so that watermelon is concentrated in the fruit setting period, the management is convenient, the collection period is also concentrated, and the melon size is uniform and the yield is high. If the pollination completion time exceeds 10 days, the melons are not neat and grow slowly, affecting the yield.
The pollination temperature must be strictly managed. The suitable temperature for melons to sit on melons is between 25°C and 32°C. Temperatures higher than 32°C will reduce the activity of watermelon pollen. In addition pollination of watermelon, pollen tube development, complete fertilization also need certain conditions, at this time the temperature should not be too high. Therefore, during the pollination of autumn quince watermelon, the temperature requirement within the shed is more stringent. It is best not to exceed 30°C during the day and not less than 15°C during the night. This will be more conducive to pollination, sitting in the melon, increase the rate of sitting and reduce melons. If the temperature in the shed reaches 30°C, cool it in a timely manner.
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