What to do about grape fruit drop
The web introduces how to deal with grape fruit drop and the best treatment methods for grape fruit drop, which will definitely help you. Let's learn about it together!
Grape vines consume a lot of nutrients, and a lack of nutrition can cause fruit drop. Improving the overall nutrition of the trunk can enhance the quality of flower buds, so it is necessary to apply top dressing in time and skillfully apply nitrogen fertilizer. Appropriate foliar application of fertilizers is beneficial for improving the fruit setting rate in later stages. At the same time, pruning the trellis to reduce unnecessary branches and excess flower and fruit clusters can save nutrients and improve fruit quality. Learn more in detail next.
1. Variety
Choosing a good-quality variety can effectively prevent fruit drop, with disease-resistant and stress-tolerant grape varieties being the best.
2. Top Dressing
In September-October, apply a sufficient amount of basic fertilizer, mainly composed of decomposed manure or organic fertilizer, which can increase the organic matter content in the soil. Sufficient basic fertilizer in autumn can help the plant recover its vitality, stabilize the new buds in spring, and thus better bloom and bear fruit, accumulating nutrients for the next year. After the grape flowering stage and from June to August, apply high-potassium, low-nitrogen fertilizer, and properly control high-nitrogen fertilizer to prevent excessive growth of branches and reduce physiological fruit drop and other issues.
3. Foliar Fertilizer
Apply 0.3% boric acid solution once during the three stages of bud formation, initial flowering, and full bloom, that is, appropriately apply 0.3% borax solution, 0.3% calcium nitrate, to supplement nutrients and reduce fruit drop.
4. Rational Use of Nitrogen
It's best not to use nitrogen fertilizer before flowering, apply nitrogen fertilizer after the fruit is stable and after harvesting, and apply nitrogen, phosphorus, and potassium fertilizers before germination and after physiological fruit drop. Apply phosphorus and potassium fertilizers during the fruit coloring stage.
5. Pruning
Appropriate pruning of branches and tendrils, pinching the shoot tips and clusters, can save the nutrients of the whole plant. Grape tendrils should be removed at any time, pinch off 1/4 of the cluster tip, and bees can be used to improve pollination success during flowering, or artificial pollination can also be done. Within 7-10 days after flowering, it is necessary to thin the fruit early, removing poor-quality and buggy fruits. Better growth also means fewer fruit drops.
6. Regulators
Usually, the application of regulators is more suitable for tetraploid varieties such as Kyoho grapes, while diploid varieties are not suitable for using regulators. Spray 250-300 times PBO or 300 times B9 on leaves 10 days before flowering.
7. Physiological Fruit Drop
Strengthen the care of fruit trees, enhance fruit quality, control new shoots to prevent excessive growth, appropriately control water, stop using nitrogen fertilizer, and supplement phosphorus and potassium fertilizers.
The above is the related content about what to do about grape fruit drop and the best treatment methods for grape fruit drop, hoping it will be helpful to you!