Chrysanthemum Disease and Pest Control Techniques and Methods
Today's topic is about the techniques and methods for the prevention and control of diseases and pests in chrysanthemums, with the following details:
Chrysanthemum Disease and Pest Control Techniques and Methods
Brown spot disease in chrysanthemums can be controlled with carbendazim or chlorothalonil, and mosaic virus can be disinfected by spraying mancozeb or thiophanate-methyl on the leaves to prevent the spread. Appropriate reduction of temperature and humidity, strengthening management, using healthy seedlings, and in case of disease, spraying dimethoate, dichlorvos, Abamectin emulsion, or Aino insect cleaning emulsion. Diseased branches and leaves should be cut off and incinerated, and drainage should be carried out after rain.
Common Diseases in Chrysanthemum Cultivation
1. Chrysanthemum Brown Spot Disease: Initially, elliptical lesions appear on the leaves, which vary in size and are yellow or purplish-brown. Later, they turn into dark brown spots, and most lesions merge, causing the leaf surface to burn and all leaves to fall off.
2. Chrysanthemum Mosaic Disease: This often manifests on young leaves, causing leaf curling and deformation, stunted growth, and poor plant health. When petals are infected, they become wilted and lack luster, severely affecting normal development. The chrysanthemum B virus is also known as the chrysanthemum mosaic virus.
Major Pest Infestations in Chrysanthemum Cultivation
1. Chrysanthemum Long-tubed Aphid: Adults gather on tender shoots, petioles, and the back of leaves, and sometimes inside flower buds and corollas. Aphids pierce and absorb nutrients, causing leaves to turn yellow, wither, and fall off, petals to lose color, and blooms to wilt quickly.
2. Chrysanthemum Leafminer: The leafminer is mainly found on the back of chrysanthemum leaves, mining the leaf flesh and forming winding tunnels on the leaves. In severe cases, all leaves are invaded, turning yellow, withering, and affecting the ornamental value. If not controlled, it can spread throughout the chrysanthemum garden.
Chrysanthemum Disease and Pest Control
1. Chrysanthemum Brown Spot Disease: Timely removal of diseased leaves to reduce the source of the disease, selecting healthy parent plants for propagation, not wetting the lower leaves when watering, ensuring good drainage after rain, and regularly spraying carbendazim or chlorothalonil every 7-10 days.
2. Chrysanthemum Mosaic Disease: Timely control of aphids and green盲蝽, removing diseased plants promptly, disinfecting with mancozeb or thiophanate-methyl leaf spray to prevent the spread, reducing temperature and humidity appropriately, strengthening management, and using healthy seedlings.
3. Chrysanthemum Long-tubed Aphid: Spraying dimethoate or dichlorvos on the leaves and backs of leaves alternately to prevent resistance to the pesticide. In severe cases, spray 2000 to 3000 times liquid of fast-acting wettable powder for excellent results.
4. Chrysanthemum Leafminer: Cut off diseased branches and leaves, incinerate them, after flowering, cut off all damaged plants, burn or bury them. Prevent leafminers mainly, starting from the seedling stage of chrysanthemums. Spray dichlorvos or dimethoate on the leaves. If small tunnels are found on the leaf surface, spray Abamectin emulsion or Aino insect cleaning emulsion on the leaves for good results.
This article shares the complete introduction of chrysanthemum disease and pest control techniques and methods, hoping to provide you with help. Don't forget to check out more flower cultivation experience and knowledge!