1, virus disease: 1.1 symptoms: cactus virus disease, different types of symptoms vary greatly, mainly as a system of mosaic and local necrosis. 1.2 Infection route: sap infection. In the cultivation and management of grafting, ramets, etc., the hands and utensils adhere to the sap of the diseased plants and can carry the virus to spread. 1.3 Control methods: Isolate or destroy diseased plants and do not graft them from diseased plants. For potential infections, care should be taken to wash hands and utensils with soap. 2, stem blight, stalk rot: 2.1 Symptoms: Mainly occur in the stem near the ground, but also seen in the upper stem section. Raw water-stained yellow-green patches, gradually soft rot, leaving the dry skin or residual mandible in the later period, decay speed varies with different types of bacteria. 2.2 Incidence conditions: basin soil with undisinfected waste soil or vegetable garden soil, grafting, low temperature, frost and insect damage caused by wounds are easy to induce decay. 2.3 control methods: 1, horticultural control. See cactus anthrax. 2. Seedling bed per square meter with 50% carbendazim 5-10 grams of mixed dry soil, under the cover. 3. In the initial stage of the disease, spray 72.2% Preclosure 400 times or 20% Borteo 1200 times. 3, anthrax: 3.1 Symptoms: lesions on the stem section or stem ball was round, nearly round, diameter 4-8 mm, mostly at the edge of the edge, light brown to gray white, on the birth of small black spots, arranged round Striated, gushing orange viscous spore masses when wet. There are often faded green halos around the lesions. As the disease progresses, the overall appearance is brown rot. 3.2 Incidence conditions: Severe onset of high temperature, high humidity, and heavy rain. 3.3 Control methods: 1, horticultural control. The diseased spot was found at the early stage of the disease and should be immediately extirpated. A part of the healthy tissue near the lesion was also dug out. Then it was painted with sulphur powder or charcoal powder to dry the wound. When the weather was bad, the hair dryer could be used to dry the wound. To facilitate wound healing as soon as possible. 2, regular spraying fungicide to prevent the occurrence of disease. The commonly used agents can be 80% of anthrax omeprazole WP 800 times; 50% carbendazim WP 500-800 times; 50% thiophanate-methyl WP 500-800 times; 75% of chlorothalonil can also be used. Clear WP 1000 times plus 70% thiophanate-methyl wettable powder 1000 times, the control effect is better than a single use. 4, cactus diseases: 4.1 Symptoms: incidence at the stem section. At the beginning of the rhizome, it was green and immersed in water. At the same time, the stem segments were softened, the outer skin was sheep-like, and the internal tissues showed mucinous decay. 4.2 control methods: 1, horticultural control, with cactus anthrax. 2, at the beginning of onset, spray 50% amethricone copper 800 times, 35% thiazolyl copper wettable powder 800 times, 60% aluminum phosphate aluminum 500 times, 70% ethyl phosphorus wettable powder 500 times, 72.2% Precloxone 800 times liquid, 58% Lei Duo Mi-Mn-Zn 500 times, 64% antiviral 500 times, 56% by the mountain water granules 800 times, 72% Kelu 1000 times. Every 7-10 days, continuous control 3-4 times.
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