Identify symptoms of the disease on the azalea to make sure the infection is present. Avoid treating the azalea for rust without making sure it is infected. Look for tiny, round, yellow spots on the upper surfaces of leaves, and orange colored pustules on the undersides. Run a finger or ...
Spray the plant with a forceful jet of water from a garden hose one or two days after the final oil treatment to remove as much sooty mold from the leaf surfaces as possible. Spray the plants early in the day so the water dries in the morning and afternoon sun. Step 2 Mix 1 teaspoon...
a fungal disease characterized by patches of white or gray powder on the leaves. Plants, grass, trees and shrubs are all in danger of contracting powdery mildew, and the disease can potentially destroy the whole plant. The powder will be most evident on the leaves of the shrubs. Controlling ...
Unlike many other hydrangea diseases on this list, powdery mildew doesn’t carry a death sentence. Snip off any affected leaves when you find them, and treat the remaining plants with 50:50 milk and water,horticultural oil, a product that containspotassium bicarbonate, orneem oil. To avoid fu...
Black spots on plants are caused by a mixture of fungus and bacteria that can spread and kill a plant. Most commonly the fungal disease appears on the leaves of miniature roses, where the black spots turn yellow and the leaves fall off. The black spots c
Plants that are drought-stressed are most susceptible to catching root rot. The fungus will produce white mats under the bark or near the soil line. After heavy rain you may also notice mushrooms growing above the damaged roots. Identification Prevention Treatment Rust This disease causes brow...
There’s no way to treat it once it appears, so it’s best to try and avoid it. Make sure to plant your onions in well-draining soil, with plenty of space between them. Rust can’t survive on dead plants, so clear away fallen leaves, tall grasses, and any other plant detritus fr...
Because they are butterfly larval food, it is best toavoid using pesticides. Chemical pesticides will also harm the beneficial insects. Diseases Thinning plants enhances air circulation, minimizing fungal risks. Most disease issues will involve fungus in this type of plant. There are good plant hyg...
When compared to many other plants, healthy and well-grown palm trees generally experience fewer disease and pest issues. That’s why it’s crucial to prevent any damage to the palm, especially during transportation. Cold or freeze damage is another common cause of harm to palms, which can ...
During summer and fall, your grass may developbrown patch,powdery mildew,dollar spot,red thread,leaf spot, orrust. In such cases,use a targeted fungicideto treat the disease(s) before winter sets in. For the best chance at eradicating a disease before the cold season, Michigan State Universi...