What causes rust on eggplants? The latest analysis is here

Eggplant is a common vegetable of the solanaceous fruit type. Although ordinary, it has high edible value and also some medicinal value. Every spring, people in the south grow eggplants at home, and by summer they can harvest them. However, because the growth and development period falls in the hot and humid summer season, eggplants suffer from quite a few diseases. A common one is a rust-like substance growing on the eggplant calyx and the eggplant itself, affecting fruit quality. So what is going on, and how should it be treated? We need to explore this together.

1. Causes

There is more than one cause, and the symptoms also differ slightly. Generally, when the wind is too strong, the eggplant rubs against the branches and produces what looks like a rust-like substance, which is a physical cause. After thrips damage the eggplant, the fruit becomes deformed, and the entire fruit skin becomes covered with a rust-like substance. However, the leaves often also show wrinkling and curling, and the tender shoots show hardening and shrinkage. There is also fruit rust disease that occurs after damage by red spider mites, mainly after the flowers fade. After damage, not only does the skin rust, but sometimes the flesh cracks open.

2. General control

The field planting density needs to be reduced. Do not plant too densely. It is best that after the plants have grown, there is no contact between each eggplant plant. Then the fruit set on each plant can be covered with a simple transparent bag, which can avoid friction and still allow the ripening situation to be seen. In addition, harvest promptly after the fruit ripens. Do not leave too many fruits hanging, as this easily worsens friction. Finally, you can choose a wind-sheltered planting site.

3. Controlling thrips

Thrips are afraid of light and come out at night, so spray the pesticide just as it gets dark. In addition, thrips like to hide in the underground soil, so when spraying, carefully spray the ground. The pesticide can then kill thrips through the gaps. Thrips like to gather in groups on tender parts of the shoots to cause damage. Pay attention to spraying the pesticide. Use a 1.8% abamectin 2000-fold solution or an abamectin · chlorpyrifos EC 1000-fold liquid for spraying. For greenhouse cultivation where damage occurs, fumigants can be used.

3. Controlling red spider mites

Red spider mites spin webs and cause damage year-round. After sucking sap, they excrete and contaminate, the fruit skin loses water, the stomata become blocked, and the upper tissue gradually becomes rough and suberized. If the fruit is growing rapidly at this time, it will crack. Spray drugs such as propargite when the weather is cool. Manage fertilization and watering to improve tree vigor and resist red spider mite damage. Choose sandy loam soil for planting, and choose long eggplant varieties, which are relatively disease-resistant.

Rust on eggplants is mainly caused by insect damage, and may also be caused by human damage, though the damage conditions differ slightly and can be identified. If this happens, you can refer to the corresponding methods for treatment. Preventing in advance and doing some preventive work is very important.