Traditional Culture Encyclopedia - Weather inquiry - How is the fruit drop after the red grape blooms?

How is the fruit drop after the red grape blooms?

There are many reasons for fruit drop, such as drought, strong wind, high temperature, low temperature, continuous rainy weather at flowering stage, etc., which affect normal pollination and fertilization. The branches are too dense and the ventilation and light transmission conditions are poor. Too much nitrogen fertilizer, too fast growth of new shoots at flowering stage, competition between vegetative growth and reproductive growth for nutrients, and insufficient nutrition for ear development. Boron deficiency makes it difficult to remove the flower cap of grapes, which limits the germination of pollen and the elongation of pollen tubes and affects pollination and fertilization. Lack of phosphorus, cell division is blocked, and young fruits fall off due to poor development. The harm of thrips and botrytis cinerea in flowering period and the use of pesticides and other chemicals in blooming period. Therefore, we should pay attention to the following management: remove the empty branches and redundant nutrient branches in time to reduce the consumption of nutrients. Control the application of nitrogen fertilizer before and after flowering and apply more phosphorus and potassium fertilizer. Do a good job in pest control in time. Pay attention to supplement boron and other key nutrients that affect flower bud differentiation and pollination and fertilization. After the grapes germinate and before flowering, spraying the leaves with 500 times of micro-fruit-supplementing force and 1500 times of micro-boron-supplementing force for 2-3 times is beneficial to strengthening the flower heads and promoting the grapes to take off their hats. Spraying grapes twice after they are fully ripe is beneficial to improve fruit setting rate and reduce seedless fruit grains.