Water jar disease is a physiological disease of grape fruit, also known as grape color disease. Grapes are susceptible to this disease when they are exposed to high temperatures, rain, or improper management of fertilizers and water.
Grape water jar symptoms
The color of the fruit is not normal, and the color is pale. The white variety has a blistering fruit. The fruit of the colored variety turns into a red water. The fruit becomes soft and becomes a pack of acid water. It easily falls off. The disease often occurs at the tip of the ear. The incidence of two spikes is more than that of one ear, and the groundwater level is high or the fruit is warm and rainy when it is nearly mature. The incidence is heavier.
The cause of grape water jar disease
1. In the early stage of pruning, the leaves remain insufficient, and the leaves can not keep up with later nutrition. 2. The groundwater level is high or the grape ripening stage encounters rainfall, especially after the high temperature, the rainfall occurs, the field is hot and humid, and the occurrence is heavy; 3. The load The amount is too large, the potassium is insufficient, the effective leaf area is small, and the nutrition of the tree is insufficient.
Grape water jar disease prevention method
1. Leave enough leaves for at least 15 to 18 leaves per panicle (leaving each two leaves at the summer shoots); 2. Timely drainage in rainy days in the field, shallow water for irrigation in Jiuqing; 3. Compound fertilizer and potash fertilizer for Jishi; 4. Phosphorus for multiple applications. Potassium organic fertilizers, such as poultry manure, grass ash, and other farmyard fertilizers, increase the potassium content of leaves and fruits; 5. Strengthen the summer pruning, reasonable load; 6. The groundwater level of high land should be drained in time.
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