What are the control methods for southern blight in tulips?
Southern blight is a common disease that causes great damage to tulips and often leads to the death of the plants. When growing them, attention should be paid to prevention and control.
Symptoms: the whole plant wilts, white mycelial strands or rapeseed-like tan-colored small sclerotia wrap around the stem base, and the affected part turns brown, rots and decays. Large numbers of white mycelial strands and tan-colored fungal bodies can be seen on the soil surface.
Pathogen: Sclerotium rolfsii Sacc., called the perfect small sclerotium disease, belongs to the Deuteromycotina fungi. The hyphae are white and silky, spreading in a fan shape or radially, and later gather into mycelial strands or become tangled into sclerotia. The sclerotia resemble rapeseeds, initially white to yellowish white, later turning tan, round, with a smooth surface.
Transmission routes: 1. The pathogen overwinters in the soil as sclerotia or mycelial strands with diseased plant residues. When conditions are suitable the following year, the sclerotia or mycelial strands produce hyphae for primary infection.
2. The silky hyphae produced by the plant extend and touch neighboring plants, or the sclerotia spread through water flow for secondary infection, causing the disease to spread and expand. The disease is severe in years or seasons of continuous cropping, heavy clay soil, low-lying terrain, or high temperature and humidity.
Control methods: When diseased plants are found, remove and burn them promptly. Drench the diseased holes and neighboring plants with river water mixed with 5% Jinggangmycin aqueous solution at 1000-1600 times dilution, or 50% Tian'an aqueous solution at 500-600 times dilution, or 20% tolclofos-methyl emulsion at 1000 times dilution, or 90% fenaminosulf wettable powder at 500 times dilution, pouring 0.4-0.5 liters per plant (hole). When plowing the soil, mix in 100-150 kg of lime powder per mu to make the soil slightly alkaline, which can inhibit the reproduction of the southern blight pathogen.
Root lice feed on the bulbs in the soil, bore into the epidermis and suck the sap, causing the plants to grow weakly or to rot easily or to be induced to develop diseases. Soak the infested bulbs in dilute lime water for 10 minutes, then take them out and rinse them clean to kill the root lice.
Symptoms: the whole plant wilts, white mycelial strands or rapeseed-like tan-colored small sclerotia wrap around the stem base, and the affected part turns brown, rots and decays. Large numbers of white mycelial strands and tan-colored fungal bodies can be seen on the soil surface.
Pathogen: Sclerotium rolfsii Sacc., called the perfect small sclerotium disease, belongs to the Deuteromycotina fungi. The hyphae are white and silky, spreading in a fan shape or radially, and later gather into mycelial strands or become tangled into sclerotia. The sclerotia resemble rapeseeds, initially white to yellowish white, later turning tan, round, with a smooth surface. In addition, it has been reported that Corticium rolfsii (Secc.) Cyrzi. is also a pathogen of this disease.
Transmission routes of southern blight in tulips
1. The pathogen overwinters in the soil as sclerotia or mycelial strands with diseased plant residues. When conditions are suitable the following year, the sclerotia or mycelial strands produce hyphae for primary infection.
2. The silky hyphae produced by the plant extend and touch neighboring plants, or the sclerotia spread through water flow for secondary infection, causing the disease to spread and expand. The disease is severe in years or seasons of continuous cropping, heavy clay soil, low-lying terrain, or high temperature and humidity.
Control methods for southern blight in tulips:
When diseased plants are found, remove and burn them promptly. Drench the diseased holes and neighboring plants with river water mixed with 5% Jinggangmycin aqueous solution at 1000-1600 times dilution, or 50% Tian'an aqueous solution at 500-600 times dilution, or 20% tolclofos-methyl emulsion at 1000 times dilution, or 90% fenaminosulf wettable powder at 500 times dilution, pouring 0.4-0.5 liters per plant (hole). When plowing the soil, mix in 100-150 kg of lime powder per mu to make the soil slightly alkaline, which can inhibit the reproduction of the southern blight pathogen.
Symptoms and control of southern blight in tulips
Although tulips (detailed introduction) are not very difficult to cultivate, they are still prone to disease if care is neglected. Southern blight is one of the more common diseases of tulips and can cause the whole plant to wilt. Let me give you a detailed introduction to the symptoms, causes and control methods of this disease.
Tulip (detailed introduction)
I. Symptoms:The whole plant wilts, white mycelial strands or rapeseed-like tan-colored small sclerotia wrap around the stem base, and the affected part turns brown, rots and decays. Large numbers of white mycelial strands and tan-colored fungal bodies can be seen on the soil surface.
II. Causes:
a. The pathogen overwinters in the soil as sclerotia or mycelial strands with diseased plant residues. When conditions are suitable the following year, the sclerotia or mycelial strands produce hyphae for primary infection.
b. The silky hyphae produced by the plant extend and touch neighboring plants, or the sclerotia spread through water flow for secondary infection, causing the disease to spread and expand. The disease is severe in years or seasons of continuous cropping, heavy clay soil, low-lying terrain, or high temperature and humidity.
III. Control methods:When diseased plants are found, remove and burn them promptly. Drench the diseased holes and neighboring plants with river water mixed with 5% Jinggangmycin aqueous solution at 1000-1600 times dilution, or 50% Tian'an aqueous solution at 500-600 times dilution, or 20% tolclofos-methyl emulsion at 1000 times dilution, or 90% fenaminosulf wettable powder at 500 times dilution, pouring 0.4-0.5 liters per plant (hole). When plowing the soil, mix in 100-150 kg of lime powder per mu to make the soil slightly alkaline, which can inhibit the reproduction of the southern blight pathogen.