Prevention and Control of Root Rot of Cymbidium

Although the spider orchid (details) is a relatively easy to raise foliage plants, there are still flower friends who will raise the spider orchid disease. The root rot of spider orchid is a common disease of spider orchid, which may be unfamiliar to novice flower friends. Xiaobian will introduce the prevention and control methods of root rot of spider orchid in detail for you.

(Details)

Symptoms: To harm seedlings, adult plants can also be sick. At the early stage of disease, only individual branch roots and fibrous roots were infected, and gradually extended to the taproot. After the taproot was infected, the early plants did not show symptoms, and then with the deterioration of root, the function of absorbing water and nutrients gradually weakened. The aboveground part was in short supply of nutrients. When the light was strong around noon and the evaporation was large, the upper leaves of the plants wilted, but they could recover at night. In severe cases, wilting does not recover overnight. At this time, the root bark browned and separated from the pith, and finally the whole plant died.

2. Pathogen: The disease is often similar to the symptoms of retting roots and belongs to fungal diseases.

3. Occurrence rule: The pathogen overwinters in the soil and on the diseased body, generally from late March to early April, and enters the peak period in May. Its occurrence has a great relationship with climatic conditions. Low temperature, high humidity and insufficient light in seedbed were the main environmental conditions causing this disease. Seedling soil viscosity, easy hardening, poor ventilation caused by root growth and development blocked, but also easy to disease. In addition, after the roots are damaged by underground pests and nematodes, there are many wounds, which is beneficial to the invasion of germs. In this environment, not only take sowing, cuttage of herbaceous flowers vulnerable, take cuttage, plant, layering propagation rose, hibiscus, hibiscus and other woody flowers are also prone to disease.

IV. Control methods:

1. Disinfection of seeds and cuttings. Before sowing, seeds can be treated with 0.3% of the seed weight of Tuijunte or 0.1% of the seed weight of Triadimefon, or soaked with 80% of 402 antibacterial emulsifiable solution 2000 times for 5 hours; the base of cuttings can also be soaked with the same concentration of liquid for 1 hour before cuttage.

2, seedbed soil disinfection, 50% carbendazim 1.5 grams per square meter sprinkled on the surface of the soil, or 75% quintozene 3 grams have good effect, and can also treat damping-off disease, blight.

3. Chemical control. When the disease occurs, 40% Genhuning 1000 times solution can be sprayed or watered, or 80% 402 EC 1500 times solution can be used to irrigate the roots.

4, timely control of underground pests and nematodes harm.

How to control root rot of spider plant?

1. Symptoms

At the initial stage of disease, only individual branch roots and fibrous roots were infected, and gradually extended to the taproot. After the taproot was infected, the early plants did not show symptoms, and then with the deterioration of root, the function of absorbing water and nutrients gradually weakened. The aboveground part was in short supply of nutrients. When the light was strong around noon and the evaporation was large, the upper leaves of the plants wilted, but they could recover at night. In severe cases, wilting does not recover overnight. At this time, the root bark browned and separated from the pith, and finally the whole plant died.

2. Prevention and control methods

1. Disinfection of seeds and cuttings. Before sowing, seeds can be treated with 0.3% of the seed weight of Tuijunte or 0.1% of the seed weight of Triadimefon, or soaked with 80% of 402 antibacterial emulsifiable solution 2000 times for 5 hours; the base of cuttings can also be soaked with the same concentration of liquid for 1 hour before cuttage.

(2) Disinfection of seedbed soil: 50% carbendazim 1.5g/m2 sprinkled on the ground, or 75% quintozene 3g has good effect, and can also control damping-off disease and blight.

③ Chemical control. When the disease occurs, 40% Genhuning 1000 times solution can be sprayed or irrigated; or 80% 402 EC 1500 times solution can be irrigated.

④ Timely control underground pests and nematodes.

Symptoms and control methods of root rot of spider orchid

Chinese Garden Network November 19 news: [Symptoms] to harm seedlings, adult plant stage can also be sick. At the initial stage of disease, only individual branch roots and fibrous roots were infected, and gradually extended to the taproot. After the taproot was infected, the early plants did not show symptoms, and then with the deterioration of root, the function of absorbing water and nutrients gradually weakened. The aboveground part was in short supply of nutrients. When the light was strong around noon and the evaporation was large, the upper leaves of the plants wilted, but they could recover at night. In severe cases, wilting does not recover overnight. At this time, the root bark browned and separated from the pith, and finally the whole plant died.

[Pathogen] The disease is often similar to the symptoms of retting roots and is a fungal disease.

[Occurrence law] The pathogen overwinters in the soil and on the diseased body, generally from late March to early April, and enters the peak period in May. Its occurrence has a great relationship with climatic conditions. Low temperature, high humidity and insufficient light in seedbed were the main environmental conditions causing this disease. Seedling soil viscosity, easy hardening, poor ventilation caused by root growth and development blocked, but also easy to disease. In addition, after the roots are damaged by underground pests and nematodes, there are many wounds, which is beneficial to the invasion of germs. In this environment, not only take sowing, cuttage of herbaceous flowers vulnerable, take cuttage, plant, layering propagation rose, hibiscus, hibiscus and other woody flowers are also prone to disease.

[Control methods] 1. Seed and cutting disinfection. Before sowing, seeds can be treated with 0.3% of the seed weight of Tuijunte or 0.1% of the seed weight of Triadimefon, or soaked with 80% of 402 antibacterial emulsifiable solution 2000 times for 5 hours; the base of cuttings can also be soaked with the same concentration of liquid for 1 hour before cuttage.

2. For seed bed soil disinfection, 1.5g 50% carbendazim per square meter was sprinkled on the surface of the soil, or 3g 75% quintozene had good effect, and it could also control damping-off and blight.

3 . Chemical control. When the disease occurs, 40% Genhuning 1000 times solution can be sprayed or watered, or 80% 402 EC 1500 times solution can be used to irrigate the roots.

4. Timely control of underground pests and nematodes.