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Control Methods for Rhizoctonia Stem Rot of Carnation

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It mainly attacks the root crown area of the plant, and infected plants dry up and die quickly. The pathogen infects the root crown of seedlings near the soil surface, initially causing brown or dark brown spots that gradually spread to the surrounding area. The base of the seedling rots and constricts, causing lodging. When older seedlings at the stem base are affected, the cortex near the soil surface rots and becomes slimy. The leaves of diseased plants turn pale white, wilt and droop, and finally the whole plant dies. Control methods: (1) Before cuttings are taken, flower pots and soil must be disinfected. (2) Plants should be grown on raised beds, and watering should be controlled so that the potting soil does not become too wet. (3) Disinfection

It mainly attacks the root crown area of the plant, and infected plants dry up and die quickly.

The pathogen infects the root crown of seedlings near the soil surface, initially causing brown or dark brown spots that gradually spread to the surrounding area. The base of the seedling rots and constricts, causing lodging. When older seedlings at the stem base are affected, the cortex near the soil surface rots and becomes slimy. The leaves of diseased plants turn pale white, wilt and droop, and finally the whole plant dies.

Control methods:

(1) Before cuttings are taken, flower pots and soil must be disinfected.

(2) Plants should be grown on raised beds, and watering should be controlled so that the potting soil does not become too wet.

(3) When disinfected soil is again infected with Rhizoctonia solani, 75% quintozene can be mixed with soil and broadcast, at a rate of 0.1% of the weight of the potting soil, or 3-5 grams per square meter. At the same time, spray 1% Bordeaux mixture every 10-15 days for protection.

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