What diseases do you have in ladyboard and how to prevent them

Chinese cabbage is a vegetable native to East Asia, commonly known as green cabbage, also known as gum cabbage, scoop cabbage, scoop white, and rape.

Common insect pests: cabbage worms, diamondback moths, flies, aphids.

thrips, etc. Control method: 5% imidacloprid can be used.

10% chlorfenapyr.

5% spinomycin, 5% emamectin benzoate.

and so on to spray insecticide.

Common diseases: 1. Virus diseases: the heart leaves of the disease at the seedling stage are green in the leaf veins, and then produce uneven green mottling. At the onset of the disease, the leaves of the adult plant are severely atrophied, with small brown spots and obvious dwarf deformities. High temperature and drought are prone to occur at the seedling stage.

Prevention and control methods: The selection of disease-resistant varieties can take advantage of the advantages of fast growth and strong disease resistance in the first generation of hybrid seedlings to achieve the purpose of disease prevention. Water management, in case of high temperature and drought period, the first water can be used after sowing; The next day or the next day, when the seedlings are unearthed, water the second time; Clause.

After the seedlings emerge in three or four days, the third water can be watered according to local conditions; Pay attention to the elimination of diseased seedlings and weak seedlings, strengthen water and fertilizer management, adopt formula fertilization technology, cultivate strong seedlings, and enhance the disease resistance of seedlings.

2. Downy mildew.

Common fungal diseases. When the seed plant is damaged, white mold can grow on the leaves, peduncles, flower apparatus and seed pods, the peduncle and flower apparatus are hypertrophied and deformed, the petals are green, and the seed pods are pale yellow and thin.

Prevention and control methods: The drug can be evenly sprayed on the front and back of the leaves with 600-800 solutions of methalyxin, downy mildew carb hydrochloride, and enoylmorpholine zinc. Sow at the right time.

The appropriate sowing date should be determined according to the stubble, variety and climate. The early sowing disease is serious, and the late sowing disease is mild, but the heart is insufficient, but if there is a high temperature and drought year, it should be sown late.

3. Powdery mildew: This disease mainly harms leaves. At the beginning of the disease, the foliar surface appears to be amorphous, amorphous, and the demarcation is not obvious. The corresponding apostle of the leaf appears amorphous white patches.

The marginal boundaries are also not obvious. With the development of the disease, the number of lesions increases and expands, and is connected to each other to form plaques, the symptoms of spot flour become more and more obvious, and in severe cases, most or even all of the leaves are covered, and the appearance is like being covered with a layer of flour, hence the name.

Control methods: Appropriate supplementation of phosphorus and potassium fertilizers, supplementation of foliar fertilizers, and enhancement of plant resistance. Continuous spraying of 25% pyraclostrobin at the beginning of the disease.

The prevention and control of rapeseed pea disease should adhere to the plant protection policy of "agricultural prevention and control first, supplemented by chemical control", and chemical control should choose high-efficiency, low-toxicity and low-residue pesticides to produce pollution-free pea products. Let's take a look at the following four pea disease prevention and control methods.

1. Powdery mildew in cabbage

It mainly harms leaves, stems and pods. Lesions begin to appear on the leaves, the leaf surface initially appears powdery pale yellow spots, and then gradually expand to irregular small spots, the spots are connected with each other, the surface is covered with white powder, the damaged leaves gradually wither yellow, and then gradually expand to the stems and pods, resulting in the stem yellowing, and the tender pods drying up until death. The disease occurs in the rainy season from July to August, and the humid environment with warm days and cool nights is easy to cause disease epidemics.

Rapea disease prevention and control methods: alternate with chlorothalonil 600 times, mycloconazole 1000 times, Xianxing 800 times or methyl tobuzine 600 times.

2. Brown spot disease of cabbage pea:

The affected parts are leaves, stems, and pods. In the early stage of infection, light brown lesions are produced on the leaf surface, and the edges of the lesions are obviously patchy; infection on the stem, which produces spindle-shaped or near-oval brown lesions on the stem; The pod is infected with disease, and the lesion is slightly sunken, and gradually expands to the depth to damage the seed. Seeds or diseased residues are the primary source of infection, and high humidity in the field is conducive to the occurrence and epidemic of this disease.

Vegetable pea disease control method: seed treatment, can be soaked in warm soup. Spray with 100 grams of myclobutazole with 60 kg of water at the beginning of the disease, or spray with 80-100 grams of charcoal wettable powder with 60 kg of water.

3. Vegetable pea root rot:

In order to damage the roots, the root system turns black and rots, and then the whole plant dies. First of all, the roots are susceptible, at first the hair roots, fibrous roots are light brown, and then turn black, and when the rhizome is seriously infected, it shrinks or becomes brown in the form of a "thin waist". Epidemic is very likely to occur under continuous cropping, high temperature and high humidity.

Rapea disease control methods: (1) Seed treatment: 75% chlorothalonil can be used 15 grams per mu of seed dressing or 10 ml of seed dressing kilograms at Shile time before sowing.

2) Seedling control: spray or irrigate roots with 100 grams of 65% good Senling mixed with 60 kg of water; Water the roots with 600-800 times of dixone or methamethoxine and methacryllen.

What are the diseases of ladyboard vegetables? This kind of aphids are particularly susceptible to aphids, dimethoate and for this um, aphids are particularly effective.

What is a gourge? It is what we often call fungus vegetables, and I want to say that we will not recognize it after changing the name. However, the name of the fungus is indeed better than the fungus and is not easy to be confused with the fungus.

As people become more and more receptive to the taste of the greens, the area under the cultivation of the greens is also growing.

Common diseases of the cabbage, the planting of the cabbage, the role and value of the cabbage, the nutritional value of the cabbage, and the method of how to do the cabbage: the seedlings, young stems, and branches of the cabbage can be taken, and the plants can be used for medicinal value, and the nutrients are very colorful. When pests and diseases emerge on plants, immediate control should be carried out.

Brown spot disease.

Brown spot damage: Brown spot disease, also known as small red spot disease, is a key damage to the growth and development of leaves. At the onset of the disease, the lesions of the leaves are very ring-shaped, the edges of the leaves are purple-brown, and the middle of the lesions is brown and slightly sunken.

Prevention and control of brown spot disease: moderate thinning of plants can be carried out, natural ventilation and light transmittance standards of plants can be improved, and it is necessary to prevent excessive watering and excessive use of base fertilizer. In the early stage of the disease, chlorothalonil or Sukrin can be sprayed to prevent and control brown spot disease.

Botrytis cinerea.

The damage of gray mold: Generally, the disease occurs in the middle and late stages of plant growth and development, which will damage the leaves, petioles, and capitate inflorescences of spiders. *At first, it is a lesion like a trace of water, but then it spreads quickly and causes the leaves to rot, and the diseased leaf stems are very easy to break.

Prevention and control of gray mold: it is necessary to improve the management method of liquid fertilizer, moderately increase the use of phosphorus and potassium fertilizer, and improve the disease resistance of plants. In the early stage of the disease, Suclin or Bendifen can be sprayed to prevent and control gray mold.

Seedling rot.

Damage from seedling rot: Seedling rot can damage the tips and leaves of young seedlings, and diseased plants are very easy to fall down, and the leaves will fall off.

Prevention and control of seedling rot: the diseased plants should be removed immediately, the water should be appropriately filled, the stored water should be removed immediately, and the amount of soil water should be reduced. In the early stage of the disease, DuPont Kelu or ethylphosphine, manganese zinc can be sprayed to prevent and control seedling rot.

Leaf spot disease.

Damage from leaf spot: The key damage is to the leaves of the plant, the lesions are like rings or near-rings, and small gray-black grains will be produced in the middle and late stages of the diseased area.

Prevention and control of leaf spot: Plants can be planted with high furrows or high ridges, and pay attention to immediate drainage pipes when it rains to reduce the environmental humidity of the soil layer. In the early stage of the disease, Pythium or Benomefen can be sprayed to prevent and control leaf spot.

Through our introduction, I believe you have a deeper understanding of the common diseases of cultivated cabbage.

Harm of Brown Spot Disease Brown spot disease, also known as red spot disease, mainly harms the growth of leaves. At the time of onset, the lesions of the leaves are very round, the edges of the leaves are purple-brown, and the middle of the lesions is yellow-brown and slightly sunken.

Prevention and control of brown spot disease can be properly densely planted to improve the ventilation and light transmission conditions of plants, and to avoid overwatering and applying too much nitrogen fertilizer. It can also be sprayed with chlorothalonil or Sukrin in the early stage of the disease to prevent and control brown spot disease.

The damage of gray mold generally occurs in the middle of plant growth, which will cause the attack on the leaves, petioles and inflorescences of spiders. What starts out as a water-stained lesion can spread quickly and cause leaf rot and diseased stems can easily break.

Prevention and control of gray mold It is necessary to strengthen the management of fertilizer and water, appropriately increase the amount of phosphorus and potassium fertilizer, and improve the disease resistance of plants. In the early stage of the disease, Suclin or Benomyl can be sprayed to prevent and control gray mold.

Damage of seedling rot Seedling rot can damage the base and leaves of the seedlings, and the infected plants can easily fall down and the leaves will fall off.

Prevention and control of seedling rot It is necessary to remove the infected plants in time, properly replenish water, remove stagnant water in time, and reduce soil moisture. In the early stage of the disease, DuPont dew or ethylphosphine manganese zinc can be sprayed to prevent and control seedling rot.

The damage of leaf spot disease mainly affects the leaves of the plant, the lesion is like a round or nearly round, and small black grains will appear in the later infected area.

Prevention and control of leaf spot Plants can be cultivated with high furrows or high ridges, and attention should be paid to timely drainage in the rainy season to reduce soil moisture. In the early stage of the disease, Pythium or Benomyl can be sprayed to prevent and control leaf spot.

Hello! The main pests and diseases of children's vegetables are black spot, soft rot, diamondback moth, aphids, etc. Black spot disease can be prevented and treated with 1500 times of 25% promethoin suspension.

In addition to avoiding the prevention and control of soft rot as a cruciferous crop, field management should strictly prohibit flood irrigation, in the growth period can be used Fengling 150 grams of water 100 liters of irrigation roots, in the early stage of the disease spray 72% agricultural streptomycin wettable powder 3000-4000 times liquid control. Diamondback moth can be controlled with 5% anti-Taibao EC 2000 times or 5% stuck gram EC 2000 times.

The disease of bracken is mainly white rust, and the prevention and control should be strictly rotated, pay attention to field drainage and seedling ventilation, remove diseased branches and leaves in time when the disease is found, and spray 58% of the jujube to destroy the frost spirit? 500 times of manganese zinc, or 500 times of 64% alum.

The main pests are Spodoptera litura, Spodoptera exigua, ground tiger, etc., which can be controlled with 5,000 times of Kung Fu liquid, or 5% inhibition of Taibao, and 2,000 times of Kathic emulsifiable concentrate.