Diseases and prevention of Christmas cactus, treatment of common diseases

1. Stem rot

Symptoms: When Christmas cactus is infected with stem rot, it mostly occurs at the base of the stem. In the early stage of the disease, there will be brown-green yellow spots, and the spots will be irregular in shape. In the later stage, the spots will turn dark brown and sunken, the subcutaneous tissue will rot and dry, and there will be black granular substances.

Prevention and control methods: When cultivating, the substrate must be disinfected before use to ensure that there are no pathogens in it. When managing, pay attention to the amount of watering and the number of watering each time. Do not let the environment be too humid. Control the humidity appropriately, and prefer dryness to wetness. In addition, in the early stages of the disease, spray Zineb to prevent further infection.

2. Leaf spot

Symptoms: Leaf spot disease usually starts from the edge of the leaves. In the early stage, it appears as gray spots that are slightly sunken. After the expansion in the later stage, the edges will become dark brown. The spots will slowly dry up and gray-black mold spots will appear.

Prevention and control methods: Once it is found to be infected with leaf spot disease, the diseased leaves should be removed in time to reduce the source of infection. In addition, medication should be used in the early stage of the disease. The medication can be 800 times diluted pentachloronitrobenzene fungicide, or the medication can be directly applied on the leaves.

3. Notes

If you want to prevent Christmas cactus from being infected with diseases, you must not only disinfect the soil, but also pay attention to management methods. It should be placed in a well-ventilated place, especially in the hot summer. Ensure good ventilation and reduce watering. Do not provide a hot, stuffy, or humid environment, otherwise it will easily become infected.