How to prevent and cure root rot and leaf blight of rich trees?
How to prevent and cure root rot and leaf blight of rich trees? Please introduce the symptoms of root (stem) rot of the rich tree: dark brown from stem base to root, rot, young leaves lose vitality and wither. Prevention and control methods: (1) timely ventilation to keep the cultivation environment dry. (2) pay attention to the disinfection of cultivation substrate and flowerpot. (3) after transplantation, the sprained and decayed tissue at the top of the root was removed, and then the wound was sprayed with Sukeling, dried and planted. (4) in the early stage of the disease, the aboveground part was sprayed with 1000 times of 50% carbendazim wettable powder or 70% methyl topiramate wettable powder every 10 days, and the underground part was irrigated 2 to 3 times with 70% mancozeb wettable powder. 5. If the rot mold is active, it can be sprayed with Pulek, carbendazim, carbendazim and so on. Rich leaf blight symptoms: dark brown in the initial stage, gray or dark brown spots like sunburn symptoms inside, black powder can be seen on the spots for a long time. Prevention and treatment methods: (1) diseased leaves should be removed and destroyed in time. (2) strengthen maintenance and management, timely watering, fertilization, each growing season can be topdressing 2 to 3 times foliar fertilizer, such as 0.5% potassium dihydrogen phosphate or double-effect micro-fertilizer 200 times. (3) at the initial stage of the disease, use 75% chlorothalonil wettable powder or 50% carbendazim wettable powder or 1500 times methyl thiophanate wettable powder. Click to get more money tree culture methods click to get more flower planting methods
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What diseases and insect pests should be prevented from growing rich trees?
What diseases and insect pests should be prevented from growing rich trees? Please give an introduction to the prevention and control methods. The following two common disease prevention and control methods for raising rich trees are for reference: First, root (stem) rot This is a common disease that seriously harms rich trees, also known as rot. Control methods: (1) keep the cultivation environment dry, pay attention to planting...
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Which herbicides can be used to control weeds in growing tobacco?
Which herbicides can be used to control weeds in growing tobacco? Please introduce that the seeds of tobacco are small, the seedlings grow slowly, and they are often damaged by weeds. The main weeds are: Setaria mandshurica, Artemisia angustifolia, paspalum barnypalum, sophora officinalis, sedge, pig calamity, plantain, dandelion and so on. The prevention of weeds in tobacco fields.
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