High yield and bumper harvest of grapes, how to prevent and control grape sunburn, effective methods of grape planting in 2017

Click to follow us and update the agricultural planting technology every day to help you get rich with high yield and high income.

Symptoms:

The orchard with high groundwater level and poor drainage is more serious. The damaged fruit initially appeared light brown and bean-sized patches on the fruit surface, and then expanded into an oval about 7-8 mm in size, with slightly sunken necrotic spots on the surface. the injured area is vulnerable to subsequent infection of anthracnose or other fruit rot pathogens and cause fruit rot. The berries in the hard kernel stage are more prone to sunburn, and the fruits are less damaged after coloring.

Prevention and control methods:

1. Low-lying orchards should pay attention to drainage after rain and lower the groundwater level.

2. When pruning in summer, a few leaves should be left for shade near the ear, while the excessive leaves in other parts should be removed properly.

3. Spray 0.2% potassium dihydrogen sulfate, or 5% plant ash leaching solution.