Clivia anthracnose

The main symptoms: Anthrax mainly damage leaves and tender stems. After onset, round or near-circular lesions were found on the leaves, and lesions on the tip of the leaf margins became semi-circular and irregularly shaped. In the early stages, the lesions were small, reddish-brown, gradually enlarged afterwards, and the color was also deepened. The central part turned grayish, and sometimes the edges were yellowish. In the end, the lesions were dark brown, rim-like, with black dots on the upper part, which are the spore plates of the pathogen. Onset of disease: The hyphae in the host residue or soil overwintering in the first year of April at the beginning of the old leaves began to develop, from May to June when the rapid development of 22-28C, high temperature and humidity in the plum rain season is severe. Conidia spread by air currents, wind and rain, watering, etc., and penetrated more from the wound. Control methods: 1. Strengthen cultivation management and cultivate healthy plants. 2. The diseased leaves were cut and burned in time. 3. Chemical control: Spray 50% carbendazim WP 700-800 times, 50% anthraquinone WP WP 500 times, 70% thiophanate WP 800-1000 times, 75% Chlorothalonil 500 times.

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