Symptoms and Control of Brown spot of Tulip

The elegance of tulips is very much liked by many flower friends, it is not difficult to plant tulips in pots, but tulips are more likely to be infected with brown spot, and the tulips after the occurrence of brown spots will reduce the ornamental value of tulips and endanger the growth of tulips, so we must pay attention to timely treatment to ensure the health of tulips.

Tulip

First, symptoms: the infected leaf buds are malformed and curled, and the leaves that grow up after the tender buds are damaged become curly. If the environment is humid, a large number of gray mold conidia will be produced on the diseased tissue, which will affect the nearby healthy plants and make the leaves susceptible, so the growth of the bulb will be greatly affected.

After the flowers are injured, white or light yellowish brown spots begin to appear, then expand rapidly and wither, or turn brown and dry. Banding also appears on the pedicel, and the conidium sometimes occurs above it. Flowers are extremely susceptible to infection at every stage of the disease. There are sclerotia on the outer shell of the diseased bulb, or round or oval spots on the outer scales, with grayish yellow in the center and brown at the edge, which contains one or more sclerotia. Pathogen: BotrytistulipaeLind. Is a subphylum of semispheric bacteria, which is common in tulip cultivation areas, and the rainy season is more serious. Its conidiophores bear colorless or gray conidia with black sclerotia, 1-2 mm in diameter, and a flat, round or oval surface.

Second, the route of infection: the hyphae and sclerotia remain in the rotten bulbs and soil to survive the winter. After planting diseased bulbs, a large number of conidia were produced on the dead buds, which was the source of infection of aboveground diseases.

Third, the disease conditions: the bacteria can produce conidia when the humidity reaches 90% ~ 100% and 5 ℃. The disease is serious when it is low temperature in spring and wet in rainy days.

Fourth, prevention and control methods:

1. Remove the diseased bulbs before planting and carry out rotation planting.

2. Once a bud or bud showing symptoms of the disease is found, it should be removed immediately to control the development of the disease.

3. Before planting, soak the bulb in 2% formalin solution for 30 minutes, dry and plant, in order to reduce residual bacteria.

4. During the growth period, 50% prohydantoin can be sprayed 1000 times or 50% Sukeling 2000 times or 50% carbendazim 1000 times.

Symptoms and Control of Brown spot of Tulip

Symptom

The leaf buds infected by tulip brown spot were malformed and curled, and the leaves that grew after the tender buds were damaged turned into curls. If the environment is humid, a large number of gray mold conidia will be produced on the diseased tissue, which will affect the nearby healthy plants and make the leaves susceptible, so the growth of the bulb will be greatly affected.

After the flowers are injured, white or light yellowish brown spots begin to appear, then expand rapidly and wither, or turn brown and dry. Banding also appears on the pedicel, and the conidium sometimes occurs above it. Flowers are extremely susceptible to infection at every stage of the disease. There are sclerotia on the outer shell of the diseased bulb, or round or oval spots on the outer scales, with grayish yellow in the center and brown at the edge, which contains one or more sclerotia. Pathogen: grape tulip [BotrytistulipaeLind.] It belongs to the subphylum semicarpa, which is common in tulip cultivation areas, and the rainy season is more serious. Its conidiophores bear colorless or gray conidia with black sclerotia, 1-2 mm in diameter, and a flat, round or oval surface.

Route of infection

Hyphae and sclerotia remain in rotting bulbs and soil to survive the winter. After planting diseased bulbs, a large number of conidia were produced on the dead buds, which was the source of infection of aboveground diseases.

Disease condition

The bacteria can produce conidia at 5 ℃ and humidity up to 90% ~ 100%. The disease is serious when it is low temperature in spring and wet in rainy days.

Prevention and cure method

1. Remove the diseased bulbs before planting and carry out rotation planting.

2. Once a bud or bud showing symptoms of the disease is found, it should be removed immediately to control the development of the disease.

3. Before planting, soak the bulb in 2% formalin solution for 30 minutes, dry and plant, in order to reduce residual bacteria.

4. During the growth period, 50% prohydantoin can be sprayed 1000 times or 50% Sukeling 2000 times or 50% carbendazim 1000 times.

How to control tulip brown spot

Tulip is very common in our life, the flower language of tulip: fraternity, thoughtfulness, elegance, wealth, capable, intelligent, kind-hearted, it is also a symbol of good things in our minds, in the process of its growth, how should we prevent tulip brown spot?

Symptoms of tulip brown spot: the infected leaf buds are malformed and curled, and the leaves that grow up after the tender buds are damaged become curly. If the environment is humid, a large number of gray mold conidia will be produced on the diseased tissue, which will affect the nearby healthy plants and make the leaves susceptible, so the growth of the bulb will be greatly affected. After the flowers are injured, white or light yellowish brown disease spots begin to appear, then wither quickly, or turn brown and dry. Banding appears on the pedicel, and the conidium sometimes occurs above it. Flowers are extremely susceptible to infection at every stage of the disease. There are sclerotia on the outer shell of the diseased bulb, or round or oval spots on the outer scales, with grayish yellow in the center and brown at the edge, which contains one or more sclerotia.

The pathogen of tulip brown spot: Tulip grape [BotrytistulipaeLind.] It belongs to the subphylum semicarpa, which is common in tulip cultivation areas, and the rainy season is more serious. Route of infection: hyphae and sclerotia remain in rotting bulbs and soil to survive the winter. After the planting of diseased bulbs, a large number of conidia were produced on the young buds, which was the source of infection of aboveground diseases.

Disease conditions: the bacteria can produce conidia when the degree is 5 degrees and the humidity reaches 90%-100%. The disease is serious when it is low temperature in spring and wet in rainy days.

Control methods of tulip brown spot:

The main results are as follows: 1) remove the diseased bulbs before planting and carry out rotation planting.

2) once a bud or bud showing symptoms of the disease is found, it should be removed immediately to control the development of the disease.

3) before planting, soak the bulb in 2% formalin solution for 30 minutes, dry and plant, in order to reduce residual bacteria.

4) during the growth period, 1000 times of 50% prohydantoin or 2000 times of 50% promethalin or 1000 times of 50% mildew can be sprayed.