How do citrus seedlings control anthrax?

What harm does anthracnose of citrus seedlings have? How to control anthracnose in citrus seedlings? Hope that experienced netizens can help introduce the harm and control methods of citrus seedling anthracnose in the field network, which are listed below for netizens' reference. The harm of anthracnose of citrus seedlings: anthracnose is a common disease in citrus planting. Citrus leaves, branches, fruits and even seedlings can be damaged. Anthracnose will cause fallen leaves, fruit drops, withered shoots, cortical cracking of branches and so on. And the disease during storage will cause fruit decay and cause losses. Anthracnose of citrus seedlings often occurs in the root neck or grafting, and the spot is brown and irregular. In serious cases, it causes death at the top of the stem and extends to the branches. The cause of anthracnose in citrus seedlings: the cause of anthracnose in citrus seedlings is related to tree potential and different varieties. In general, sweet orange and Wenzhou mandarin are not susceptible to disease, while citrus orchards have severe freezing damage in winter, rainy and low temperature in early spring, high temperature and rainy in summer, which are beneficial to the occurrence and development of the disease. Such as extensive cultivation and management, barren soil layer on the slope, heavy clay, poor drainage and so on, are conducive to the disease. Prevention and control methods of citrus seedling anthracnose: method 1. Management of seedling nursery: in the nursery with poor seedling conditions, the nursery with poor conditions of citrus seedlings should be deeply turned to improve the soil, increase the application of organic fertilizer, properly apply phosphorus and potassium fertilizer, timely drainage and irrigation, and do a good job of anti-freezing and pest control, so as to enhance the tree potential and improve disease resistance. Method 2. Advance prevention and control in winter: do a good job in clearing the nursery in winter, cut off diseased branches and tips, remove fallen leaves on the ground, and concentrate on burning or deep burying for composting. In order to kill the overwintering bacteria on the surface of the disease part, the stone sulfur mixture of Baume 1-2 degrees was sprayed on the nursery. Method 3. Chemical control: spraying 0.5 _ (0.5) _ (0.5) _ (100) Bordeaux solution or 0.5 _ (0.5) _ (0.5) _ (200) zinc-copper lime solution every 10 to 20 days for 2 consecutive times can basically control the occurrence of the disease. Baume 0.3 degree stone sulfur mixture plus 0.1% washing powder or 50% methyl topiramate wettable powder 800mm 1000 times solution can also be used. You can also use 50% Dysenamine water agent 800 times liquid or 65% Dysen zinc wettable powder 500 times liquid and so on. The above medications should be used alternately. Click to get more citrus planting techniques click to get more fruit planting techniques