What are the common fungal diseases of bulbous iris? A detailed guide to prevention and control

Bulbous iris is also known as blue butterfly and Alice. Its flowers are large and beautiful, with unique colors, and it has long been known as Alice, the rainbow goddess. Bulbous iris is fairly adaptable to climate, but diseases can still be caused if care is neglected. The editor has compiled the more common fungal diseases of bulbous iris for you. If you are also interested, you can follow along with the editor and learn together.

Bulbous iris

I. Damping-off

In plants affected by damping-off, the base of the bulb scales softens, then turns grayish brown, becomes covered with white mold-like growth, and finally rots away completely. The cause is mainly infection by spores, and generally the higher the temperature, the faster the disease develops and spreads.

Prevention and control methods:

1. Disinfect seed bulbs with tetrachlorodan and benlate.

2. Sterilize the soil with steam sterilization or methyl bromide.

3. Rotate with gladiolus and freesia (detailed introduction).

II. Root rot

It mainly appears as localized stunted growth of the plant, withered flower buds, and water-soaked rotting of the root system. The cause is nematodes infecting the roots through the soil, and it is relatively difficult to control.

Prevention and control methods:

1. Disinfect seed bulbs with tetrachlorodan + benlate.

2. Soil disinfection, or in the early stage of disease after planting, disinfect with 5-8 grams of etridiazole per sq m or 7-14 milliliters of propamocarb.

3. Disinfect with methyl bromide.

III. Bottom rot

Iris affected by bottom rot shows poor growth, yellowing leaves, and soon withers; the base of the bulb rots, and later white mold grows,

Prevention and control methods:

1. Soil disinfection with oxidized bitter.

2. Soak the bulbs for disinfection with Robilon.

Prevention and control of diseases caused by fungi in bulbous iris

Diseases caused by fungi in bulbous iris include:

1. Damping-off:In plants affected by damping-off, the base of the bulb scales softens, then turns grayish brown, becomes covered with white mold-like growth, and finally rots away completely. The cause is mainly infection by spores, and generally the higher the temperature, the faster the disease develops and spreads.

Prevention and control methods:

①、Disinfect seed bulbs with tetrachlorodan and benlate.

②、Sterilize the soil with steam sterilization or methyl bromide.

③、Rotate with gladiolus and freesia.

2. Root rot:It mainly appears as localized stunted growth of the plant, withered flower buds, and water-soaked rotting of the root system. The cause is nematodes infecting the roots through the soil, and it is relatively difficult to control.

Prevention and control methods:

①、Disinfect seed bulbs with tetrachlorodan + benlate.

②、Soil disinfection, or in the early stage of disease after planting, disinfect with 5-8 grams of etridiazole per sq m or 7-14 milliliters of propamocarb.

③、Disinfect with methyl bromide.

3. Bottom rot:Iris affected by bottom rot shows poor growth, yellowing leaves, and soon withers; the base of the bulb rots, and later white mold grows.

Prevention and control methods:

①、Soil disinfection with oxidized bitter.

②、Soak the bulbs for disinfection with Robilon.

Recommended reading:

Pest prevention is most important for blue ice cypress

Timely control of the pagoda tree leaf petiole moth

Suzhou City, Anhui Province, deploys forest pest and disease control for this winter and next spring

Forest pest and disease control area in Lingyuan, Liaoning, reaches 247,000 mu

Introduction to the prevention and control of common pests and diseases of bulbous iris

Bulbous iris is also called Alice and basket butterfly. It is a flower of the Iridaceae family, Iris genus. Its flowers are large and beautiful, with unique colors, like irises or butterflies, and its leaves are verdant green, like swords or ribbons. It has long been known as Alice, the rainbow goddess. Bulbous iris has fairly broad adaptability to climate and strong cold resistance, and can overwinter outdoors in the East China region. This article mainly introduces knowledge on the prevention of pests and diseases of bulbous iris for the reference and study of flower lovers.

I. Diseases

Diseases caused by fungi

1. Damping-off: In plants affected by damping-off, the base of the bulb scales softens, then turns grayish brown, becomes covered with white mold-like growth, and finally rots away completely. The cause is mainly infection by spores, and generally the higher the temperature, the faster the disease develops and spreads.

Prevention and control methods:

① Disinfect seed bulbs with tetrachlorodan and benlate.

② Sterilize the soil with steam sterilization or methyl bromide.

③ Rotate with gladiolus and freesia.

2. Root rot: It mainly appears as localized stunted growth of the plant, withered flower buds, and water-soaked rotting of the root system. The cause is nematodes infecting the roots through the soil, and it is relatively difficult to control.

Prevention and control methods:

① Disinfect seed bulbs with tetrachlorodan + benlate.

② Soil disinfection, or in the early stage of disease after planting, disinfect with 5-8 grams of etridiazole per sq m or 7-14 milliliters of propamocarb.

③ Disinfect with methyl bromide.

3. Bottom rot: Iris affected by bottom rot shows poor growth, yellowing leaves, and soon withers; the base of the bulb rots, and later white mold grows,

Prevention and control methods:

① Soil disinfection with oxidized bitter.

② Soak the bulbs for disinfection with Robilon.

Diseases caused by viruses

4. Viral disease, also called mosaic disease, mainly appears as grayish white ring spots or yellow and white streaks on the leaves. When the plant leaves are held up to the light, there are many small transparent spots, which soon become purple spots, and withering starts from the lower leaves upward. The main cause is that the virus is transmitted by aphid vectors or by contact with hands and tools.

Prevention and control methods:

① Select disease-free plants or bulbs when propagating.

② Disinfect hands, cutting tools and other tools.

③ Use pesticides such as malathion, omethoate and pirimicarb to control aphids.

II. Pests

1. Root rot nematode: After the plant is damaged, there is localized growth obstruction, withered flower buds, and the root system shows many short, narrow, black roots; in severe cases the bulbs will rot away.

The prevention and control method is to sterilize the soil with steam sterilization or methyl bromide.

2. Crickets: They mainly breed in weeds, first feeding on the tips of plant buds, and soon afterward feeding on the plant's leaves.

Prevention and control methods: ① Spray heptachlor to kill the insects. ③ Remove weeds early.

In addition, during the growth process, iris is also prone to pests such as aphids and red spider mites, mainly occurring in high temperature and dry conditions. When outbreaks occur, they are not easy to eradicate, so in the early stage spray organic sulfur agents (kills mites, miticides, etc.) and other acaricides, and at the same time use fumigant insecticides such as dichlorvos, which can also achieve good control effects. However, under high temperature and high humidity and throughout the flowering period, phytotoxicity is likely to occur, so avoid using them, or rinse with clean water after spraying. If conditions permit, using a syringe to spray water under pressure also gives very good insect control results.

Summary: The above is an introduction to the prevention and control methods for pests and diseases of bulbous iris, and I hope it is helpful to everyone.