What to do with cactus long black spots?

There are dark spots on the cactus, which may be infected with anthrax. At the beginning of the disease, it was water-stained and showed light brown patches, which turned brown, gray-brown, grayish-white to dark-brown. The shape was round or nearly circular, with a diameter of 0.4 cm to 0.8 cm or more. Sometimes the lesions are rotted and rotted, and the edges slightly bulge. When the humidity is high, the spots on the surface are scattered in small black spots, which are the fruit bodies of pathogenic bacteria. The bacteria survives over winter or summer in susceptible tissues and sicknesses. Its conidial spores spread by wind and rain, insects and man-made operations can also be spread. The optimum temperature for hyphae growth is about 25°C, and high temperature and high humidity are beneficial to its onset. Prevention methods: discover that the lesions should be dug immediately, and the surrounding healthy organizations should also dig a little at the same time, apply a small amount of sulfur powder or charcoal powder to the wounds, and dry the wounds as soon as possible. In case of rainy weather, fans or hair dryers can be used. The wound was quickly blown dry to facilitate healing of the wound. At the beginning of the disease, 25% Carbonate WP, 20% thiophanate-methyl WP or 80% Anthraquinone WP humectant can be used to prepare a moromi-like smear on the spot with good bactericidal effect. With a small amount of cultivation in the family, medical dacronine ointment can be applied around the lesions, which is easy and convenient. China Agricultural Network Editor

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