Reasons for the fruit drop in potted grapes
Are you curious about the related experience of the flower clinic with grapes, the reasons for the fruit drop in potted grapes? Let's share the detailed content next.
Many people are extremely happy when they see the grapes they raise produce clusters of fruit after flowering, but they become disappointed after months of cultivation because the fruits on the clusters almost fall off. There are many factors that cause grape fruit drop, but ultimately, it is due to the lack of daily management.
Common causes of grape fruit drop include:
Lack of fertilizer: When the fruit grows to the size of mung beans, a part of it will stop developing due to insufficient nutrition. At this time, remove some of the new shoots and appropriately apply fertilizers rich in phosphorus and potassium to ensure more nutrients are transported to the fruit clusters.
Sunburn: If the temperature reaches 30°C or higher, long periods of direct sunlight can also cause grape fruit drop. In such cases, you can spray water to cool down and use leaves to cover the fruit clusters for protection.
Disease: China has a typical continental monsoon climate, characterized by rainy seasons concentrated in summer. During this time, the cultivation environment is hot and humid, and some grape diseases such as powdery mildew, (T-J) disease, and downy mildew are prone to occur, severely affecting the fruiting of the plants. It is recommended to spray a 200-fold dilution of equal parts Bordeaux mixture every half month for prevention and control.
Pest infestation: Pests, commonly known as red spiders, are often an important cause of fruit drop in potted grapes. Their damage is more severe in hot, dry environments with little rain. They attack the leaves and fruit clusters, affecting the normal physiological functions of potted grapes. When red spider damage is detected, you can use a 40% trichlorfon emulsion at a 1000-fold dilution once a week to eliminate the red spider pests.
The above-sharing methods for the reasons for fruit drop in potted grapes are provided as reference suggestions for everyone.