What pesticide should be used for the cracking of Jufeng grapes?
Core content guide: Small experience in the cultivation of Jufeng grapes on what pesticide to use for the cracking of the fruit, specific details are as follows:
What pesticide should be used for the cracking of Jufeng grapes?
Jufeng grapes are a very popular variety of grapes. So, what pesticide should be used for the cracking of Jufeng grapes? Let's find out below.
What pesticide should be used for the cracking of Jufeng grapes?
Jufeng grapes only need to be sprayed with pesticides if the cracking is caused by diseases and pests. You can use Jinbaikang fertilizer diluted in water 200~300 times, 50% carbendazim wettable powder diluted 800~1000 times, or thiophanate-methyl 1000~1200 times diluted liquid for spray treatment.
How to prevent the cracking of Jufeng grapes
1. In the early and middle stages of fruit growth, more attention should be paid to watering to ensure the obvious development of secondary epidermal cell walls and lenticels of the fruit stem, increasing the critical expansion pressure for fruit cracking; applying napthalene acetic acid 15mg/kg and abscisic acid 100mg/kg can increase fruit swelling pressure, making the fruit expand and prolonging leaf life. In the later growth stage, it is not suitable to use ethephon for ripening.
2. Covering the grape garden with plastic film can prevent the accumulation of excessive rainwater in the roots, inhibit the evaporation of surface water, and reduce the change of soil moisture. The combination of mulch covering and irrigation can effectively prevent the drought cracking of Jufeng grape fruits.
3. If the yield of Jufeng grape fruits is too high, it can lead to poor coloring of the fruits and increase fruit cracking. Therefore, it is necessary to adjust the yield of the fruit trees and reduce cracking caused by fixed tree yields.
4. In clayey soil, an appropriate amount of nitrogen should be applied, more phosphorus and potassium, more organic fertilizers, and increased calcium fertilizers.
5. Change the traditional picking method to leave more leaves. Leave 2 leaves on the fruit cluster, remove the winter and summer buds from the axils of the lateral branches. Each branch should have 25-26 normal leaves to enhance the moisture regulation function.
6. Spraying naphthalene acetic acid mg/kg and abscisic acid 100mg/kg twice at the initial stage of fruit cracking can inhibit the ethylene activity of the plant and prevent cracking due to the use of ethефон.
This article shares the complete introduction of what pesticide to use for the cracking of Jufeng grapes, for everyone to learn and understand!