Why is the summer vegetable difficult to bear fruit?

           First, flower bud differentiation is blocked

This is the primary reason why the vegetables in summer are difficult to bear fruit. The temperature in summer is high. When the seedlings are nursed, the shade net should be covered to cool down, and the temperature should be kept at 22-28 °C to prevent high temperature from inhibiting flower bud differentiation. After the vegetable seedlings have 2 true leaves, spray potassium dihydrogen phosphate (300 times solution) and add more than 1.8% sodium nitrophenolate (6000 times liquid) to adjust the growth of the seedlings and enhance the disease resistance of the seedlings. During the nursery period, depending on the growth of the plant, it is decided whether or not to spray the promoter to control the growth of the plant, and to ensure that the flower bud differentiation during the seedling period can proceed normally.

Second, the lack of boron

Boron deficiency in the soil, coupled with high temperature, will inhibit the absorption of boron by the plant. If the boron fertilizer is not replenished, the flower bud differentiation is hindered, which is not conducive to fruit setting. During the flowering and fruiting period, 600 times of borax or 1200 times of speed borax should be sprayed to increase the fruit setting rate of vegetables.

Third, high temperature

The summer vegetable production is often seen at temperatures above 35 °C. Too high a temperature will reduce the adhesion of pollen to the stigma, affect the pollen germination and the elongation rate of the pollen tube, resulting in poor pollination and fertilization, causing a large amount of flower fruit to fall off and producing a large number of deformed fruit. Therefore, strengthening the cooling measures to control the shed temperature within the range of suitable vegetable growth is a key measure to increase the fruit setting rate of vegetables.

Fourth, excess nutrient growth

The small temperature difference between day and night, high night temperature, high soil moisture, and excessive use of nitrogen fertilizer are all causes of excessive vegetative growth and insufficient reproductive growth. Production can be sprayed with appropriate concentration of auxin and naphthalene acetic acid for control to promote the transformation of vegetative growth to reproductive growth.

It is only necessary to take effective measures to solve the problem of the summer vegetables falling and falling. The vegetable farmers can sum up the planting experience from the production, find out the law, seize the opportunity to prevent it early, and improve the quality and yield of the summer vegetables.