Prevention and Control of Leaf Rot of Nymphaea

Friends who like water lilies should know that water lilies are more likely to suffer from leaf rot. If your water lilies show irregular spots, some are shaped like earthworms, and serious leaves turn brown and rot, then your water lilies are suffering from leaf rot.

Water lily

1. Pathogen: SclerotiumhydrophilumSacc. It is called water-loving Sclerotinia sclerotiorum (Sclerotinia sclerotiorum), which belongs to the subphylum fungus. Sclerotia globose, oval to pear-shaped, initially white, then yellowish brown or black, rough surface, size 315, 681, 290, 664 microns, dark brown cells, 4 microns, 14 colors, 3 microns, 8 microns, colorless to light yellow, loose structure, cells in tissue are 3 microns in size. In the transmission route and disease condition, the sclerotia overwintered in the soil with the residual plants, and the sclerotia floated in the next year. After the temperature rose, the sclerotia germinated and produced mycelium damage to the leaves. The suitable temperature for the development of the pathogen was 25 ℃ 30 ℃, higher than 39 ℃, and less than 15 mol. It was easy to occur in summer and autumn in high humidity and rainy season.

Second, prevention and control methods:

1. Reduce the source of bacteria, remove the diseased and residual plants during harvest, bury them deeply or burn them centrally.

2. At the initial stage of the disease, 50% carbendazim wettable powder 800 times or 70% methyl thiophanate wettable powder 800 times, 50% mixed sulfur suspension 600 times, 30% basic copper sulfate suspension 500 times, once every 10 days, continuous prevention and treatment for 3 times.

Prevention and Control of Leaf Rot of Nymphaea

We often see beautiful and beautiful water lilies in ponds or blue lakes. Water lilies not only have beautiful flowers and colors like lotus flowers, but also have the flower posture of a girl who is like an ice muscle. Water lilies are native to tropical regions of North Africa and Southeast Asia. With the improvement of varieties, water lilies have been widely planted all over the world. Water lilies sleep is easy to grow, but also prone to diseases, water lilies disease how to do? Today the editor will teach you how to prevent and cure the leaf rot of sleeping lotus.

Symptoms of Nymphaea leaf rot

Nymphae leaf rot is mainly harmful to the leaves floating on the surface of the water, some are shaped like earthworms, brown or dark brown, white wrinkle globular mycelia appear in the later stage of necrosis, epigenetic tea brown globular sclerotia, the disease is serious, the leaves become brown and rotten, and it is difficult to draw out of the water.

The pathogen of Nymphaea leaf rot

The pathogen of Nymphaea leaf rot is called Sclerotinia sclerotiorum (Sclerotinia sclerotiorum), which belongs to the subphylum fungus. Sclerotia globose, oval to pear-shaped, initially white, then yellowish brown or black, rough surface, size 315-681mm 290-664 microns, outer dark brown cells 4-14cm 3-8 microns, inner layer colorless to light yellow, loose structure, cells in tissue are 3-6 microns in size. In the transmission route and disease condition, the sclerotia overwintered in the soil with the residual plants, and the sclerotia floated in the next year. After the temperature rose, the sclerotia germinated and produced mycelium damage to the leaves. The suitable temperature for the development of the pathogen was 25-30 ℃, higher than 39 ℃, and less than 15 ℃. It was easy to occur in summer and autumn.

Control methods of Leaf Rot of Nymphaea

1. Reduce the source of bacteria, remove the diseased and residual plants during harvest, bury them deeply or burn them centrally.

2. At the initial stage of the disease, 50% carbendazim wettable powder 800 times or 70% methyl thiophanate wettable powder 800 times, 50% mixed sulfur suspension 600 times, 30% basic copper sulfate suspension 500 times, once every 10 days or so, continuous prevention and treatment for 2-3 times.

The prevention and control methods of sleeping lotus leaf rot are briefly introduced here. Water lilies prefer sunny and well-ventilated environments, but avoid being exposed to too much sun. Water lilies have no special requirements for soil quality, but if you want water lilies to grow more gorgeously, they can be cultivated in soil rich in organic matter.

Symptoms and Control measures of Nymphaea Leaf Rot

Do you know the symptoms of sleeping lotus leaf rot? Do you know how to effectively prevent and cure it? It doesn't matter if I don't know. Next, the editor will introduce to you in detail the symptoms and prevention measures of Nymphae leaf rot to help you better plant water lilies.

Symptoms and control measures of Nymphaea leaf rot:

Symptoms of the disease: mainly damage the leaves floating on the water surface, the shape of the disease spot is not stereotyped, some are "S" shaped, some are shaped like earthworms, brown or dark brown, white wrinkle globular mycelia appear in the later stage of necrosis, epigenetic tea brown globular sclerotia, the disease is serious, the leaves become brown and rotten, and it is difficult to draw out of the water.

Prevention and control measures: 1. Spray the new high-fat membrane in time to form a layer of polymer film to isolate diseases and insect pests, reduce the source of bacteria, remove the disease and residual plants during harvest, bury deeply or burn them centrally. two。 Spraying pesticides at the initial stage of the disease can be combined with new high-lipid membrane and tree protection general to transform high-toxic pesticides into poisoning, toxic pesticides for low toxicity, low-toxic pesticides for micro-toxicity. Control the volatilization of pesticides, prevent the erosion of little Rain Water, reduce the dosage per mu (halved), and improve the control effect (many times).