How to control flower nematode disease

Flower nematode disease is a disease easily infected by many flowers, which mainly harms flowers such as Compositae, Primulaceae, Rosaceae, Impatiens, Begonia and so on. As nematode disease occurs in different areas and flowers, it often has different symptoms, so it is very important to do a good job of prevention.

Impatiens

1. Strengthening quarantine: newly introduced flower varieties must be quarantined and tested at designated places after passing the quarantine inspection.

2. Adopt disease-free strong seedling: choose disease-free place to establish disease-free nursery, and use disease-free strong seedling to plant.

3. Do a good job in the cleanliness of the flower field nursery: remove dead flowers and weeds and miscellaneous trees inside and outside the nursery.

4. use clean water: use groundwater irrigation to improve drainage facilities and prevent external polluted water from flowing into the flower nursery.

5. Do a good job of disinfection of seedlings and culture media.

(1) Seedling disinfection: the seedlings can be soaked in 30 times solution of 3% carbofuran granules (carbofuran) for 30 minutes before potting (carbofuran is highly toxic, so pay attention to safety when using it).

(2) Culture medium disinfection: 20 days before potting, put the culture medium into the cooking pot and completely submerge it with water, then cook it to dry, apply 35% Weibai seedling water agent 50 times liquid, cover the black film for fumigation. Before using the culture medium, uncover the black film and breathe for 7 days for 10 days before use.

6. Disinfect the finished flowers: use 3% Milol granule (gram line phosphorus) to prevent and cure the finished flowers every 30 days, the dosage is 6: 9 grams per square meter, and the character hole is applied.

7, the ground is covered with black film disinfection: before planting, 35% line water agent 3kg / mu can be applied for ground disinfection, and then covered with black film for 3 / 5 months, the prevention and control effect is obvious.

8. Application of rolling cultivation rack: off-ground and hard-bottomed planting can effectively prevent the spread and occurrence of nematodes and other diseases and insect pests.

What is flower nematode disease? How to control flower nematode disease? What are the measures taken?

Just entered May, there is always a patter of light rain, no spring when the cold, lukewarm, particularly beautiful. Recently, many flower friends have asked me what is flower nematode disease, how to prevent it, and what measures are taken. Today, I will take your questions to have an in-depth understanding.

What is flower nematode disease?

Nematodes belong to lower animals, most of which are slender, pointed or obtusely round head and tail, and generally adults are 0.3-1.0 mm long. In a few species, the hypertrophy of female adults is spherical or pear-shaped. Plant nematodes mainly harm flowers such as Compositae, Primulaceae, Rosaceae, Impatiens, Begoniaceae and so on. Diseases caused by nematodes invading flowers and plants are called nematode diseases. The common symptom of nematode disease is the growth of nodules of different sizes on the main root and lateral root. When the damage is serious, the roots rot and the leaves turn yellow and die.

How to control flower nematode disease?

Symptomatic plant nematodes mainly damage flowers such as Compositae, Primulaceae, Rosaceae, Impatiens, Begoniaceae and so on. The disease is harmful to roots, leaves, flower buds and flowers. There are two main types of symptoms:

1. Aboveground symptoms:

This kind of symptom is slippery knife nematode, the leaf shows polygonal necrotic spot, bud deformity, the whole plant is dwarfed, harms chrysanthemum, dahlia, early chrysanthemum and so on, and the insect body invades leaves and buds. Stem nematode, characterized by deformed leaves, dwarfed flowers, and even unable to bloom. Damage to tulips, hyacinths, gladiolus, daffodils, etc., insects invade bulbs and tubers and so on.

2. Root symptoms:

The root is swollen and deformed in the shape of a chicken claw, and the root tissue becomes black and rotten, such as peony, peony, four seasons begonia, rose, impatiens, cyclamen and so on. There are also spherical root knots on some roots.

Occurrence characteristics

The generation of nematodes varies from several generations to more than 10 generations in different regions and different flowers, overwintering with eggs, larvae and adults in diseased plants and soil. The insect body is transmitted by Rain Water, irrigation, tools, soil, flower seedlings, bulbs and so on. When the soil temperature rises in the following spring, the eggs hatch and the larvae invade from stomata, lenticels, wounds and so on. When the soil temperature was 15 ℃ and 30 min, it was beneficial to the development and infection of root-knot nematode and stem nematode. Under suitable conditions, a generation can be completed in 30 days. The incidence of sandy soil is serious in general. Some nematodes can also transmit viruses. From spring to autumn, the number of population showed an increasing trend, and the population structure showed diversified development.

Comprehensive prevention and control measures

1. To strengthen quarantine, newly introduced flower varieties must be quarantined and tested at designated places after passing the quarantine inspection.

2. Disease-free nursery was established by disease-free seedling selection, and disease-free seedling was planted.

3. Do a good job in the cleaning and hygiene of the flower field nursery and remove dead flowers and weeds and miscellaneous trees inside and outside the nursery.

4. Use clean water to irrigate with groundwater, improve drainage facilities and prevent external polluted water from flowing into the flower nursery.

5. Do a good job of disinfection of seedlings and culture media.

That's all I know today. I hope it will be helpful for you to read this article. If you want to know more about home gardening, please continue to follow our succulent flower bed. We will provide you with more relevant knowledge!

How to control flower nematode disease is one of the common diseases in flower cultivation. The disease is widely distributed and harms many kinds of flowers. if it is not controlled in time, it can lead to dwarfing of the whole flower plant, weak growth, and even death. The prevention and control methods of several common nematode diseases are introduced as follows:

Root-knot nematode disease is widely distributed and seriously damaged not only to peony, but also to more than 30 kinds of flowers, such as peony, rose, red, Malan, melon and leaf chrysanthemum, impatiens, cyclamen and so on. Symptoms of damaged flowers: there are clusters of round nodules of different sizes at the root of the beard. The aboveground plants showed dwarfing and weak growth, which affected flowering. The upper tip of the leaf shrinks and turns yellow, and the leaves fall early. Prevention and treatment: with 10 grams of phosphorus granules 1g to 2g, evenly buried in the pot soil, if the flowerpot is large, the dosage can be increased by about 1 gram.

Leaf nematode disease often harms chrysanthemums, as well as dahlias, magnolia, bunches, cornflowers, calamus orchids and oleander. Symptoms of damaged flowers: there were light yellowish brown spots on the leaves at the initial stage, and then extended to brown patches. Diseased plants, diseased bodies and diseased soil should be removed in time. 1-2 grams of 3% furan granules and an appropriate amount of fine soil were evenly sprinkled into the basin soil, and loosened soil was irrigated.

Stem nematode disease is mainly harmful to daffodils, as well as tulips, hyacinths, gladiolus and primroses. Symptoms of damaged flowers: after the leaves were damaged, blisters were formed, dwarfed and bent. The bulb piece appears brown ring spot, the diseased ball often can not draw out the leaf. Prevention and treatment: choose disease-free bulb culture, burn diseased plants and diseased balls. The soil was treated with chemicals, and 15% Tiemiake granules were used for each pot.