Main Diseases of Orchid and its Control measures
① Cut off the diseased leaves, remove the diseased bodies, and burn them intensively;④ The diseased plants can be sprayed with 50% benlaite or 70% thiophanate or 50% carbendazim 600 - 800 times solution once every 10 days or so, and the control effect is quite good.
1 Remove diseased leaves. Control measures: ③ to pot soil weight of 0.2% quintochloronitrobenzene disinfection, fully mixed evenly before planting; control measures: five, orchid necrotic spot disease is a virus disease. The virus is transmitted through sap, peach aphid, etc. Green spots and necrotic spots are produced on cymbidium; local necrotic spots are produced on Catalan; tree cymbidium produces mosaic;② reasonable fertilization promotes plant health and can alleviate disease; control countermeasures: 7. Sclerotinia sclerotiorum first decays in light brown water stains at the base of leaves, and then extends to the whole leaves, showing reddish brown, causing cymbidium leaves to die into tubes. Control can pull out the diseased plants, refer to the control of white silk disease.
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Occurrence and Control of Leaf spot of Carnation (Carnation)
Carnation, also known as carnation and carnation, is easily infected with leaf spot disease, affecting its growth and development and reducing the yield and quality of fresh cut flowers.
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Key points of prevention and control of rust of Tripterygium
Symptoms: at the beginning of the infected leaves, yellow-green dots appeared on the front of the leaves, gradually enlarged, and the surface was orange-yellow spots. In the middle of June, yellow powdery black spots appeared on the disease spots, that is, sexual spore organs, and yellow powdery spores were produced on the back in the later stage. Rust spores are produced inside, causing damage to pines and cypresses in autumn and winter.
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