The leaves of Pieris rapae were oval and long strip light reddish brown, surrounded by green circle, and then enlarged into irregular patches, with black spots on the spots.
Remove the diseased leaves in time and spray chemicals in time. Spray with 50% tobuzin WP 500 times.
The leaf spot of Pieris rapae is well controlled. After cutting off the diseased leaves, spray chemicals to control it. But we must deal with it in time. We can't take measures until the disease covers 50% of the leaves. It's too late to repent.
The leaves near the potted soil of the drunken butterfly flower turned a little yellow at first, like rust. The longer they grew, the more they were damaged, and there were signs of withering. Leaves and even stems become rusty.
Generally, the reasons of rust are poor ventilation, high temperature, fungal spore aggregation and rust infection.
Strengthen ventilation, reduce temperature and control water.
The leaves with excessive rust were cut off, and then the wine was sprayed with 3000 times of 50% weixiangling wettable powder. &Nbsp; >
Drunk butterfly flower is like high temperature, the heat in the north and south of China, nothing can do about it. But if you add in the humid environment, it's easy to get sick. Therefore, ventilation measures must be taken in summer. In winter, due to low temperature and dryness, drunken butterfly flower is easy to be frostbitten, so it is necessary to take heat preservation measures.
