The reasons for the difficulty of setting fruit and many abnormal fruits of watermelon

In the process of watermelon production, due to the influence of adverse factors, it is often difficult to set melon and have many abnormal fruits, which reduces the yield and commerciality, and directly affects the income of growers. The reasons for the difficulty of fruit setting and deformity of watermelon are as follows: in the flowering and fruit setting period of watermelon, the adverse climatic conditions such as high temperature, low temperature, overcast and rain, drought and so on will lead to the abnormal growth of watermelon plants. the plant growth is weak, the watermelon ovary is underdeveloped or thin, especially the continuous rainy weather will make the watermelon unable to pollinate and fertilize normally, resulting in a serious imbalance between vegetative growth and reproductive growth. The phenomenon of excessive plant growth, excessive vegetative growth and a large number of young fruits lead to the serious consequences of watermelon, such as difficult to set melon, late sitting melon and many abnormal fruits. Improper management of fertilizer and water, excessive application of nitrogen fertilizer watermelon in the growing period, if the fertilizer and water management is improper, it will cause plant nutrition imbalance, excessive growth of stems and leaves, resulting in falling flowers or melons, especially when the amount of nitrogen fertilizer is too large and phosphate and potassium fertilizer is insufficient. It is easy to make the plant overgrowth to reduce the melon setting rate. During the period of watermelon flowering and pollination, the poor pollination of female flowers during the flowering period of watermelon, if the temperature is low, it is not conducive to insect activities, affect insect pollination, but also reduce fruit setting rate. Such melon fields should be assisted by artificial pollination. If the female flower pollinates unevenly, it will cause the problem of low fruit setting rate and fruit deformity. There is not enough understanding of the characteristics of the varieties, not enough understanding of the characteristics of watermelon varieties, failure to carry out cultivation and management according to the characteristics of watermelons, especially for large fruit watermelons in the flowering and fruit setting period, the measures of controlling fertilizer and water and assisting artificial pollination are not in place, which has nothing to do with the seed quality of watermelons.