Anthrax

Onset symptoms

At the initial stage, the leaves produce brown concave spots, and then expand into circular or irregular spots. In severe cases, there is gangrene in the center of the spots

Prevention and control measures

① Reasonably close planting, increase light and improve ventilation and drainage conditions

② When cultivating strong seedlings, do not often move the plants to avoid artificial damage and disease

③ Cut off the diseased leaves and apply chlorothalonil or carbendazim 1000 times solution to the wound of plant leaves

④ Spray methyl tobuzin or carbendazim 1000 times a week

Mosaic virus disease

Incidence law

The host range is very narrow, and it is transmitted from the contact process of shrimp ridge orchid disease strain, but the harm is very serious, which is easy to cause destructive damage and difficult to eradicate

Prevention and control methods

① is a healthy plant ramet

② in order to prevent mechanical infection, it is best to disinfect the cutting tools

③ perform the final operation on the diseased strain, isolate and destroy it

Soft rot

Onset symptoms

In the initial stage, bacteria invade the leaves or heart leaves to produce water stains, which expand rapidly and contain more water. In the later stage, odor occurs, the diseased leaves turn yellow and fall off, and the whole plant dies of soft rot. The disease spreads rapidly and must be prevented and treated as soon as possible

Prevention and control methods

① Improve growth conditions, increase ventilation and reduce temperature and humidity

② Cutting off the affected part and applying antibiotic powder without watering for a week can curb the spread of the disease

③ Use 1000 times of streptomycin solution, 500 times of stone sulfur mixture or Bordeaux solution, and spray once a week

Leaf blight

Onset symptoms

Small black spots appear on the leaf tips and gradually expand into irregular disease spots. The periphery of the disease spots forms dark brown and the middle is light grayish brown. In serious cases, it spreads to the whole leaf, and finally withers and leaves

Prevention and control methods

① Remove the diseased leaves and spray 1000 times of methyltobuzin or haoshengling solution

② Affected plants should be sheltered from rain or suspended from watering to prevent aggravation of the disease

③ Spray 1000 times of haoshengling liquid once a week to prevent diseases