Consulting | How to recognize the disease through the leaves and stems of orchids
Orchids have a beautiful, luxurious and beautiful beauty, but to have beautiful flowers, it requires a very meticulous care, both time and effort of the grower. So the way of identifying the leaves and stems of the orchid tree will help you quickly detect the disease so that there is a timely treatment.
Black disease orchid stalks
With symptoms such as stalks appearing at the base of the stem or rhizome, the posterior brown color will gradually enlarge and dry at the tip of the stem near the base and neck, the stem is black, the upper leaves turn yellow, crooked deformity.
After about 2-3 weeks of infection, the orchid will die, the main cause of the disease is caused by the fungus Fusarium oxysporum, so the best prevention method should separate the diseased plants and control. the rest of the plants by spraying or immersing the whole plant in the fungicide, for larger plants, remove the rot and proceed with the fungicide.
Leaf spot disease in orchids
The way to recognize the disease through the leaves and stems of the orchid plant, with leaf spot disease with the symptoms of the disease usually having a rhombus shape or a round shape, gray-brown color, appearing on the lower leaf surface of the plant, when severe disease will cause yellowing of the leaves. Poor growth resistance and barrenness.
Leaf spot disease is caused by the fungus Cercospora, which often develops during the rainy season in orchards with high humidity and in orchards with phosphorus deficiency. So you should take good care in combination with fungicide spray to limit the disease.
Bacterial brown rot
With symptoms of the disease is light brown, the round, succulent, then turn dark brown, the disease damages the leaves, stems and germs, causing the parts to rot and smell very unpleasant.
The main cause of bacterial brown rot is caused by Erwinia bacteria, so the best prevention measure in this case is to remove the rotten portion and immerse the plant in Physan in a certain proportion, or can use lime to apply to cuts, and stop watering for the first 1 or 2 days.
Bacterial soft rot
The typical symptom of the disease is an indeterminate, white and water booty wound, usually spreading along the width of the orchid's leaves, when the weather is wet, the diseased tissue will spoil, to In the dry weather, the diseased tissue is atrophy and gray-white in color.
The main reason is caused by the bacteria Pseudomonas Gladioli, it is best to use the agricultural powder antibiotics and apply to the cut or you can use lg Streptomycin with 2 Tetracylin 500 tablets mixed with water. and spray directly into the plant.
On the base of the orchid with a yellowish-brown diseased stump, the stem is shriveled, the leaves are yellow, in days when the orchid is sick, the root of the plant is damaged, leading to the stem. The leaves are wrinkled, the orchid grows poorly, severe disease will cause the plant to die. With lymphadenopathy will harm the orchid.
The main cause of the disease is caused by the fungus Sclerotium rolfsii, the best preventive measure is because orchid gardens have too high humidity, or orchid pots hanging close together will quickly spread the disease, because So you should limit moisture and incorporate fungicide spray.
How to identify diseases through the leaves and stems of orchids will help growers know common diseases that often harm orchids, thereby taking effective preventive measures.