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Symptom Identification and Control Methods of Carnation Rust

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Rust is one of the common diseases of carnation, and susceptibility varies among cultivars. It generally occurs commonly in autumn and winter when control is neglected, and is severe in continuous cropping fields where the previous crop was heavily diseased. The whole plant can be affected, with leaves suffering the most severe damage. Reddish-brown spots appear on both the upper and lower surfaces of diseased leaves, and the epidermis around the diseased area ruptures, exposing red powdery material, which is the uredinium of the pathogen. In the later stage, the color of the diseased area deepens, and after the epidermis ruptures, dark brown to black powdery material appears, which is the telium of the pathogen. Rust can also damage the stems and sepals of carnation. Carnation rust is caused by the fungus Uromyces dianthi, and is a

Rust is one of the common diseases of carnation, and susceptibility varies among cultivars. It generally occurs commonly in autumn and winter when control is neglected, and is severe in continuous cropping fields where the previous crop was heavily diseased. The whole plant can be affected, with leaves suffering the most severe damage. Reddish-brown spots appear on both the upper and lower surfaces of diseased leaves, and the epidermis around the diseased area ruptures, exposing red powdery material, which is the uredinium of the pathogen. In the later stage, the color of the diseased area deepens, and after the epidermis ruptures, dark brown to black powdery material appears, which is the telium of the pathogen. Rust can also damage the stems and sepals of carnation.

Carnation rust is caused by the fungus Uromyces dianthi, which is a fungus.

The pathogen overwinters on carnation as telia. In the following spring, the pathogen is spread by wind and infects plants of the Euphorbiaceae family, then after a developmental stage moves to carnation to cause damage.

Control methods: During the disease period, chemical control is the main measure. You can choose 20% carboxin emulsifiable concentrate at 400 times dilution, or 65% zineb wettable powder at 500 times dilution, or use 0.3 degree Baume lime sulfur mixture for spraying, spraying once about every 10 days, for 2-3 consecutive sprays, to control the spread of the disease.

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