Welcome to our blog post on Common Chrysanthemum Plant Diseases! Chrysanthemums, with their vibrant blooms and diverse varieties, are beloved additions to gardens, but like any plant, they can fall victim to a range of common diseases that can hinder their beauty and health. This blog post aims to discuss the top 10 common Chrysanthemum plant damaging diseases, including their symptoms, best treatments, prevention, and management. So, buckle up to explore these Chrysanthemum plants’ ten most common diseases.
Important Points for Beginners to Identify and Manage Diseases in Chrysanthemum Plants
- Identifying the disease: The first step is identifying the disease infesting your Chrysanthemum plant so that you can approach it with the most effective control method.
- Regular Monitoring: Monitor your Chrysanthemum plants regularly for signs of diseases. This will help you to identify an infestation early when it is easier to control.
- Sanitation: Remove the diseased plants and burn them.
- Natural Control: Several natural control methods can help to manage diseases. These include plant extracts, essential oils, composting, and organic fungicides.
- Chemical Control: If natural controls are ineffective, use fungicides as a last resort, and follow the label instructions and dosage carefully.
10 Common Chrysanthemum Plant Damaging Diseases
Rust Disease in Chrysanthemum Plant
- Disease Symptoms by Puccinia Chrysanthemi: Rust is a common disease characterized by distinctive yellow to orange spots on the upper leaf surfaces. As the disease advances, the yellow spots develop into raised pustules or blisters with powdery rust-colored spores. The leaves may become deformed, distorted, curled, twisted, or stunted in growth.
- Survival and Spread: The rust fungus spreads in the form of powdery spores showing a rusty appearance. The spores cause secondary infections during temperatures between 20-30°C and >85% humidity. Wet leaves, dense foliage, and plant stress create congenial conditions for spreading disease.
- Treatment, Maintenance, and Control Measures: Spray wettable sulfur, tebuconazole, propiconazole, azoxystrobin, chlorothalonil, mancozeb, zineb, captan, karathane, copper sulfate, and copper hydroxide.
Powdery Mildew Disease in Chrysanthemum Plant
- Disease Symptoms by Oidium Chrysanthemi: The characteristic symptom of powdery mildew is a white, powdery coating on the leaf surfaces, stems, and flowers. It consists of fungal spores and mycelium. Infected leaves show symptoms of defoliation, curling, rolling, distortion, and premature leaf drop.
- Survival and Spread: Oidium chrysanthemi prefers warm temperatures, 20-27°C, and drier weather of 40-70% humidity for the fungal spores to germinate and establish. Shade, dense canopy, and poor air circulation create a favorable environment for the fungus.
- Treatment, Maintenance, and Control Measures: Spray captan, carbendazim, potassium bicarbonate, thiophanate methyl, wettable sulfur, tebuconazole, propiconazole, iprodione, vinclozolin, and azoxystrobin.
Septoria Leaf Spot Disease in Chrysanthemum Plant
- Disease Symptoms by Septoria Chrysanthemi: The symptoms of the septoria leaf spot are small circular brown or black spots with a lighter-colored center. The spots often appear in clusters, creating a speckled or blotchy appearance. Infected leaves exhibit symptoms like yellowing around the spots and premature leaf drop.
- Survival and Spread: Humidity of >80% and temperature between 20-27°C are conducive for disease spread. Splashing water is favorable for germination and infection. High plant density and poor air circulation favor the disease. It can survive on infected plant debris, including fallen leaves, stems, and flowers.
- Treatment, Maintenance, and Control Measures: Spray chlorothalonil, carbendazim, benomyl, captafol, azoxystrobin, thiophanate methyl, mancozeb, propiconazole, or tebuconazole to control