How to prevent and control common lily diseases? Detailed prevention and control methods

1. Soft rot. It harms the bulbs, causing them to rot and giving off a foul, offensive odor. It occurs severely when the temperature is high and humidity is great, causing rampant damage and spreading rapidly. Before planting, select undamaged bulbs and soak them in a 0.1% potassium permanganate aqueous solution for 8-10 minutes to disinfect them. After the disease occurs in the field, use a 5000-fold agricultural streptomycin aqueous solution, or a 5000-fold streptomycin sulfate aqueous solution, or a 5000-fold new phytomycin aqueous solution to drench the roots and spray the leaves, once every 7-10 days, for 2-3 consecutive times, pouring about 2-3 kg per plant each time, or spraying the leaves until moisture drips, whichever is suitable.

2. Damping-off. It harms the bulbs and root system, causing the bulbs to rot and the roots to rot and die, and finally the plant stands upright and dies. Before planting, pay attention to selecting disease-free bulbs and soak the bulbs in a clarified 0.1% limewater solution for 8-10 minutes to disinfect them. During field management, increase the application of phosphorus and potassium fertilizers and avoid over-applying nitrogen fertilizer to improve disease resistance. Generally, apply potassium dihydrogen phosphate or high-efficiency biological phosphorus-potassium fertilizer to the roots once a month, 25-30 g per plant, diluted with clear water or decomposed and rotted human and livestock manure water at 2-3 kg and then drenched. After the disease occurs in the field, use a 600-fold Dexon aqueous solution, or a 1000-fold copper sulfate aqueous solution to drench the roots, once every 7-10 days, for 2-3 consecutive times, and it is suitable to drench about 2-3 kg of the solution per plant each time.

3. Leaf spot. It harms the leaves. After water-soaked dark brown lesions appear on the leaf surface, the leaves lose green color, turn yellow, wither, die, and fall off. When dark brown water-soaked lesions appear on the leaves, continuously spray the leaf surface 2-3 times with a 1000-fold Tuzet aqueous solution, or a 1000-fold cyproconazole aqueous solution, or an 800-fold leaf spot cleanser aqueous solution, once every 7-10 days, evenly spraying all the leaves until water droplets begin to run down the leaves and seep into the root soil, which can then control the occurrence and damage of leaf spot.

4. Gray mold. It harms the flower buds and flowers. After pale yellow gray mold-like matter covers the flower buds and flowers, the flower buds shrivel and fall off, and the flowers rot and wilt. It is very easy to develop the disease in a humid environment. When pale yellow gray mold-like matter appears on the flower buds and flowers, continuously spray the leaf surface 2-3 times with a 1000-fold Procymidone aqueous solution, or a 1000-fold procymidone aqueous solution, or a 1000-fold gray mold cleanser aqueous solution, once every 7-10 days, and be careful to spray onto the flower buds and flowers until water droplets begin to drip, whichever is suitable.

5. Viral disease. It harms the entire plant, causing new roots not to grow, new leaves not to grow, and the more it grows the smaller it becomes, with leaves short and clustered, and gradually yellowing, withering, and dying. During the growth of lilies, generally the roots should be drenched or the leaf surface sprayed once a month with a 600-fold plant virus vaccine aqueous solution, or a 600-fold virus cleanser aqueous solution, or a 600-fold virus Bik aqueous solution, drenching about 2-3 kg per plant each time, or spraying the leaves until they drip, whichever is suitable, to weaken the virus activity in the plant body, which can effectively prevent the plant from developing the disease.

6. Aphids, red spiders, scale insects, whiteflies. They harm the leaves, pierce and suck the sap, spread viral diseases, and cause the plant to decline, affecting bolting and flowering. It is necessary to spray the leaf surface once a month with a 1000-fold aphid-whitefly cleanser aqueous solution, or a 1000-fold Lorsban aqueous solution, or a 1000-fold Nongdile aqueous solution for prevention and control, in order to protect the leaves.

7. White grubs, mole crickets, crickets, small cutworms. They are all underground pests that bite and eat the underground root system, causing the plants to lodge and die. It is necessary to drench the roots once a month with a 1000-fold Lorsban aqueous solution, or an 800-fold trichlorfon aqueous solution, or a 25-30 fold dry, pure plant ash extract, or a 10-15 fold decomposed and rotted rabbit manure aqueous solution for prevention and control, drenching about 2-3 kg of the solution per plant each time.