How to control anthracnose by planting chrysanthemum?

What harm does chrysanthemum anthracnose have? How to control anthracnose by planting chrysanthemum? Netizens are also asked to help introduce the harm and control methods of chrysanthemum anthracnose in the farming network, which are listed below for netizens' reference. The harm of chrysanthemum anthracnose: Artemisia annua anthracnose mainly harms leaves and stems. Leaves infected, primary white to yellow-brown spots, and then expand into amorphous or round brown spots, the edge is slightly raised, the size is 2-5 mm. The stem infected, the primary yellow-brown spot, and then expanded into a long strip or oval slightly sunken brown spot, the disease spot around the stem for a week, the diseased stem browning contraction, above the pathogenic part or the whole plant died. When the humidity is high, the disease part overflows the reddish-brown liquid, that is, the secretion of the pathogen. The cause of anthracnose of Artemisia annua L.: the pathogen overwintered on the residual body in the form of mycelium and conidia, and carried out primary infection and re-infection with conidia. Spread by Rain Water sputtering and small insect activities, the usually warm and rainy weather and ecological environment are conducive to the epidemic of the disease. The application of too much nitrogen fertilizer led to strong plant growth and serious disease. Methods for the prevention and control of anthracnose of Artemisia annua 1. The amount of organic fertilizer per mu is 4000kg to 4500kg, and nitrogen fertilizer is applied properly. Make the plant healthy but not flourish, enhance the ability of disease resistance. Method 2, using medicament for prevention and treatment: 1, spraying with 50% carbendazim wettable powder 500 times liquid; 2, spraying 80% spray gram wettable powder 600 times 800 times liquid; 3, using 70% methyl topiramate wettable powder 1000-1200 times liquid alternately spraying, once in the first 7 days, spraying 3 times in a row. Click to get more chrysanthemum planting techniques click to get more vegetable planting techniques