What are the control methods for leaf rot in water lilies?
Friends who love water lilies should know that water lilies are relatively prone to leaf rot. If your water lily shows irregularly shaped disease spots, some shaped like earthworms, and in severe cases the leaves turn brown and rot, then it means your water lily has contracted leaf rot.
Water lily
I. Pathogen:Sclerotium hydrophilum Sacc., called water-loving small sclerotium (spherical small sclerotium), belonging to the Deuteromycotina fungi. The sclerotia are spherical, elliptical to pear-shaped, initially white, later turning yellowish-brown or black, with a rough surface, measuring 315-681 * 290-664 micrometers; the outer layer's dark brown cells measure 4-14 * 3-8 micrometers; the inner layer is colorless to pale yellow, loosely structured, with cells in the tissue measuring 3-6 micrometers. Transmission route and disease conditions: the sclerotia overwinter in the soil along with diseased plant debris; the following year the sclerotia float on the water surface, and after temperatures rise the sclerotia germinate and produce hyphae that infect the leaves. The optimum temperature for pathogen development is 25-30°C; above 39°C and below 15°C are unfavorable for disease development. The disease is most likely to occur in the high-humidity, rainy seasons of summer and autumn.
II. Control methods:
1. Reduce the source of inoculum; remove diseased plant debris at harvest time, and bury it deep or burn it in a centralized manner.
2. At the early stage of the disease, begin spraying 50% carbendazim wettable powder at 800 times dilution, or 70% thiophanate-methyl wettable powder at 800 times dilution, or 50% mixed sulfur suspension concentrate at 600 times dilution, or 30% basic copper sulfate suspension concentrate at 500 times dilution, once every 10 days or so, for 2-3 consecutive treatments.
Control methods for leaf rot in water lilies
We often see water lilies with brilliant colors and charmingly graceful flowers in ponds or azure lakes. Water lilies not only have flower colors as beautiful as those of lotus, but also have a flower posture like that of a girl with ice-like skin and an otherworldly air. Water lilies originated in North Africa and the tropical regions of Southeast Asia, and with variety improvement they have been widely planted around the world. Water lilies are easy to grow, but they are also prone to diseases. What should you do when water lilies develop diseases? Today the editor will teach you the control methods for leaf rot in water lilies.
Symptoms of leaf rot in water lilies
Leaf rot in water lilies mainly damages the leaves floating on the water surface. The disease spots are irregular in shape, some shaped like an "S", some shaped like earthworms, brown or dark brown. In the later stage of the necrotic area, white wrinkled spherical mycelial masses appear, followed by tea-brown spherical small sclerotia. In severe cases, the leaves turn brown and rot and are difficult to pull out of the water.
Pathogen of leaf rot in water lilies
The pathogen of leaf rot in water lilies is called water-loving small sclerotium (spherical small sclerotium), belonging to the Deuteromycotina fungi. The sclerotia are spherical, elliptical to pear-shaped, initially white, later turning yellowish-brown or black, with a rough surface, measuring 315-681*290-664 micrometers; the outer layer's dark brown cells measure 4-14*3-8 micrometers; the inner layer is colorless to pale yellow, loosely structured, with cells in the tissue measuring 3-6 micrometers. Transmission route and disease conditions: the sclerotia overwinter in the soil along with diseased plant debris; the following year the sclerotia float on the water surface, and after temperatures rise the sclerotia germinate and produce hyphae that infect the leaves. The optimum temperature for pathogen development is 25-30°C; above 39°C and below 15°C are unfavorable for disease development. The disease is most likely to occur in the high-humidity, rainy seasons of summer and autumn.
Control methods for leaf rot in water lilies
1. Reduce the source of inoculum; remove diseased plant debris at harvest time, and bury it deep or burn it in a centralized manner.
2. At the early stage of the disease, begin spraying 50% carbendazim wettable powder at 800 times dilution, or 70% thiophanate-methyl wettable powder at 800 times dilution, or 50% mixed sulfur suspension concentrate at 600 times dilution, or 30% basic copper sulfate suspension concentrate at 500 times dilution, once every 10 days or so, for 2-3 consecutive treatments.
That is a brief introduction to the control methods for leaf rot in water lilies. Water lilies like a sunny and well-ventilated environment, but should be protected from excessive exposure to strong sunlight. Water lilies have no special requirements for soil, but if you want the water lilies to grow more brilliantly, you can cultivate them in soil rich in organic matter.
Symptoms and control measures for leaf rot in water lilies
Do you understand the symptoms of leaf rot in water lilies? Do you know how to effectively control it? It does not matter if you do not know. Next, the editor will introduce in detail the symptoms and control measures for leaf rot in water lilies, to help everyone grow water lilies better.
Symptoms and control measures for leaf rot in water lilies:
Disease symptoms: It mainly damages the leaves floating on the water surface. The disease spots are irregular in shape, some shaped like an "S", some shaped like earthworms, brown or dark brown. In the later stage of the necrotic area, white wrinkled spherical mycelial masses appear, followed by tea-brown spherical small sclerotia. In severe cases, the leaves turn brown and rot and are difficult to pull out of the water.
Control measures: 1. Spray New High Lipid Film in a timely manner to form a polymer film that isolates pests and diseases, reduces the source of inoculum, and remove diseased plant debris at harvest time, burying it deep or burning it in a centralized manner. 2. At the early stage of the disease, when spraying chemicals, you can mix in New High Lipid Film and Tree Guardian General to transform highly toxic pesticides into moderately toxic ones, moderately toxic pesticides into low-toxic ones, and low-toxic pesticides into slightly toxic ones. This controls the volatilization and drift of pesticides, prevents washing away by light rain, reduces the dosage per mu (by half), and improves the control effect (several times over).