Common fungal diseases of Iris bulbosa and their control methods

Bulb iris, also known as blue butterfly, Alice, its flowers are large and beautiful, and unique color, known as the rainbow goddess Alice. Iris bulb has strong adaptability to climate, but it can also cause diseases if it is not cared for. The editor has sorted out the more common fungal diseases of Iris bulb for you. If you are also interested, you can learn with the editor.

Iris bulbosa

First, blight

In plants suffering from orange disease, the bulb scales soften at the base, then show grayish brown, covered with white mildew, and finally rot completely. The main cause of the disease is spore infection. The higher the temperature, the faster the disease develops and spreads.

Prevention and control methods:

1. Disinfect the seed ball with tetrachlordane and Maolaide.

2. Disinfect the soil with steam sterilization or potassium bromide.

3. Rotation with sword orchid and freesia (details).

2. Root rot

It was mainly manifested in the local growth of the plant was blocked, the bud withered, and the root system rotted in the form of water. The cause of the disease is that the nematode is infected by the root through the soil, which is difficult to control.

Prevention and control methods:

1. Disinfect the seed ball with tetrachlordane + anti-Ryder.

2. Soil disinfection, or disinfection with Edeli 5g / m ~ 8g / m ~ 2 or PUBG 7ml / m ~ 2 at the initial stage of disease after planting.

3. Disinfect with methane bromide.

Third, rump rot

Iris with rump rot shows poor fertility, the leaves turn yellow and soon wither; the bulb base is rotten, and later white mold is present.

Prevention and control methods:

1. Oxidizing bitter soil disinfection.

2. Lobilone impregnated bulbous roots for disinfection.

Control of Diseases caused by Iris bulb Fungi

The diseases caused by Iris bulb fungi are:

1. Blight: in a plant suffering from orange disease, the base of the bulb scales softens, then appears grayish brown, is covered with white mildew, and finally rotts completely. The main cause of the disease is spore infection. The higher the temperature, the faster the disease develops and spreads.

Prevention and control methods:

Disinfect seed balls with ①, tetrachlordane and Morel.

②, disinfect the soil with steam sterilization or potassium bromide.

③, rotation with sword orchid and freesia.

2. Root rot: the local growth of the plant was blocked, the bud withered, and the root system rotted in the form of water. The cause of the disease is that the nematode is infected by the root through the soil, which is difficult to control.

Prevention and control methods:

①, tetrachlordane + Maolaide disinfect seed balls.

②, soil disinfection, or disinfection with Edeli 5 8 grams per square meter or propofol 7 14 milliliters per square meter at the initial stage after planting.

③, disinfection with methyl bromide.

3. Rump rot: Iris suffering from rump rot shows poor fertility, leaves turn yellow and soon wither; the bulb base is rotten, and later white mold is present.

Prevention and control methods:

①, oxidizing bitter soil disinfection.

② and Lobilone impregnated bulbs were disinfected.

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Introduction to the control of common diseases and insect pests of Iris bulb

Bulb Iris, also known as Alice, basket butterfly, for the Iridaceae, Iris flowers. The flowers are large and beautiful, with unique colors, such as a kite like a butterfly, green leaves, like a sword, known as the rainbow goddess Alice. Iris bulb has wide adaptability to climate and strong cold tolerance, so it can survive the winter in open field in East China. This paper mainly introduces the prevention knowledge of diseases and insect pests of Iris bulb, which can be used as a reference and study for flower friends.

I. Diseases

Diseases caused by fungi

1. In plants suffering from orange disease, the bulb scales soften at the base, then show grayish brown, covered with white mildew, and finally rot completely. The main cause of the disease is spore infection. The higher the temperature, the faster the disease develops and spreads.

Prevention and control methods:

① disinfects seed balls with tetrachlordane and anti-Ryder.

② disinfects the soil with steam sterilization or potassium bromide.

③ rotates with sword orchid and freesia.

two。 The root rot is mainly manifested in the local growth of the plant, the wilting of the bud and the water-soaked rot of the root system. The cause of the disease is that the nematode is infected by the root through the soil, which is difficult to control.

Prevention and control methods:

① sterilized the seed ball with tetrachlordane + free rayde.

② soil disinfection, or disinfection with Edeli 5g / m ~ 8g / m ~ 2 or PUBG 7ml / m ~ 2 at the initial stage after planting.

③ was disinfected with methane bromide.

3. Iris suffering from rump rot shows poor fertility, leaves turn yellow and soon wither; the bulb base is rotten, and later white mold is present.

Prevention and control methods:

① oxidizes bitter soil to disinfect.

② Lobilone impregnated bulb disinfection.

Diseases caused by viruses

4. Virus disease, also known as mosaic disease, is mainly characterized by gray-white wheel spots or yellow and white stripes on the leaves. If you see through the light of the plant leaves, there are many small transparent spots that soon turn purple and wither upward from the lower leaves. The main cause is that the virus is transmitted by aphid vectors or by contact with hands and utensils.

Prevention and control methods:

Disease-free plants or bulbs were selected for ① propagation.

Disinfect ② hands, knives and other tools.

③ uses marathon, omethoate, aphids and other pesticides to control aphids.

II. Insect pests

1. After the root rot nematode plant was damaged, the local growth hindered, the bud withered, and the root system showed many short, narrow and black roots, and the bulb would rot in severe cases.

The control method is to sterilize the soil with steam or to disinfect the soil with methane bromide.

two。 Crickets mainly reproduce in weeds, eat the bud tip of the plant in advance, and eat the leaves of the plant soon.

Control method: ① spraying heptachlor to kill insects. ③ gets rid of weeds early.

In addition, Iris is also prone to aphids, red ticks and other pests in the process of growth, which mainly occurs in high temperature and dry, and is not easy to become extinct in large occurrence, so it is necessary to spray organic sulfur agent (acaricidal, acaricidal, etc.) and other wall lice agents in the early stage. at the same time, the use of dichlorvos and other insecticidal fumigants can also get a good control effect. However, it is easy to produce drug damage in high temperature and humidity and the whole flowering period, so it should be avoided, or washed with clean water after spraying. Conditional use of injection tube pressurized spray water, the effect of insect control is also very good.

Conclusion: the above is the introduction of the prevention and control methods of diseases and insect pests of Iris bulb. I hope it will be helpful to you.