Making use of their plentiful blooms of lilac, pink or white flowers, azalea bushes offer ample colour to gardens. The crops are members of the Rhododendron genus, and several species develop in U.S. Department of Agriculture plant-hardiness zones 8 to 10. Classification of the genus contains five kinds of crops including deciduous azaleas and evergreen azaleas. The shrubs resist most diseases and bugs can stay for a lot of years and, in general. However, the illness rust can mar the look of injury leaves and azaleas.

Rust Kinds

Rust develops from several kinds of fungi in the Pucciniaceae family. The kinds that infect azaleas contain Pucciniastrum myrtilli (P. vaccinii) and Pucciniastrum vaccinii. These pathogens thrive in warm and moist conditions. When they’re near other crops which can be hosts of the illness the odds of azaleas getting contaminated with rust raises. Ornamentals which can be vulnerable to rust and trees contain hemlock, spruce, juniper, birch, many and fuchsia types of cypress.


Symptoms of rust start to to look throughout hotter months. The indications of the illness contain spots that are tiny about 1/8 inch in diameter on the upperside of leaves. On the lower, pustules containing orange red spores produce. Water spurs the development of pustules, and as long as leaves are damp, new pustules will be till they protect the the top of leaf’s under-side. Spores journey to other crops via water splashes and air currents. Along with the ugly discoloration caused by rust, defoliation also happens in the event the disease infects a lot of the plant’s leaves.

Rust Administration

Take them off from your plant, as soon as you discover leaves with rust. Clean any particles from around crops, as the leaves might also be contaminated. When the weather warms right up in the spring rust fungus can overwinter in fallen leaves and infect crops. Disinfect your backyard implements as resources can be collected on by spores and spread the illness to other crops. Rust can be prevented by fungicides available from backyard shops. Spray-capable remedies which contain lime lime or lime-sulfur germination is disrupted by. After signs of the rust create on crops fungicides aren’t as successful.


Don’t allow water accumulate on crops s O leaves remain moist overnight. Avoid utilizing over-head sprinklers and water crops earlier s O crops have time to dry before night. Keep locations around crops of foliage that is fallen. Dispose of crops that are significantly afflicted. In the event that you don’t want to handle the rust issues, acquire cultivars of azaleas which might be resistant to the illness like “Gibraltar,” “Balzac” and “Red Letter.” Species and cultivars which can be highly vulnerable to rust contain pinxterbloom (R. nudiflorum), plumleaf (R. prunifolum), swamp (R. viscosum), “Klondyke,” “Ilan Primrose,” “Ilam Peachy Keen”, “Rufus,” “Llam Pink William,” and “Sunrise.” A Void planting azaleas near other crops which can be susceptible to rust.