What kind of medicine has the cabbage just been unearthed, and when is the appropriate medicine for

For the pests and diseases of the newly unearthed bok choy, there are the following suggestions:

1.Aphids, whiteflies and other pests: 10% imidacloprid wettable powder can be used 1000-1500 times and acetamiprid agent alternately, sprayed 2-3 times in a row, with an interval of 7-10 days. Pay attention to spraying on the back of the leaves of the plant, which is where pests congregate.

2.Cabbage larvae, noctuidae and other pests: cyhalothrin 2000 times and cyhalothrin 3000 times can be sprayed alternately. It is forbidden to take the medicine on sunny days and at night during the rainy season.

3.Downy mildew and soft rot: 72% downy mildew manganese zinc WP 600-800 times solution and 25% double dil SC solution 1500 times liquid can be used in rotation. Soft rot can be treated with 4000 times of 72% agricultural streptomycin sulfate.

In addition, there are experiences shared by other farmers, such as using urea laundry detergent water, cigarette stick water, etc. instead of pesticides to eliminate pests such as aphids. When choosing to use pesticides, it is important to choose the appropriate pesticide according to the specific situation, and use it strictly in accordance with the usage and dosage on the instructions.

Three kinds of pesticides such as fenvalerate, acemethamidophos, and cypermethrin can be used to control insect pests.

Three kinds of pesticides, such as fenvalerate, acemethamidophos and cypermethrin, are widely used in vegetable pest control and have good effects on aphids and cabbage worms. Understanding the degradation of pesticide residues under specific conditions in specific areas is of great significance for the quality and safety control of agricultural products.

Therefore, cabbage was used as the test crop, and different pesticides were sprayed according to the actual situation of cabbage insect pests.

Gas chromatography was used to analyze the pesticide residues, and the decomposition of three pesticides in the insect-proof net was analyzed.

Chinese cabbage can be cultivated all year round, the harvest period is only about 30 days, the pests and diseases in different seasons are inconsistent, the pesticides sprayed are not the same, it is recommended that it is best not to spray. Urea laundry detergent water can be used.

Alternative pesticides such as cigarette stick water eliminate aphids.

and other pests. 2.When there are many insects, pyrethroid insecticides can be sprayed with high efficiency and low toxicity.

Spraying of cabbage should be carried out within a week period from seedling emergence to harvest, and 2 hours before the rain, or two hours after the rain, of course, it is best to spray in the morning after the dew goes down in the morning or after 2 o'clock after lunch.

Pesticide time for bok choy Generally after the cabbage emerges, in order to prevent the invasion of pests and diseases, you can sprinkle some plant ash before the dew in the morning.

See if there are wormholes on the leaf surface, if not, you don't need to spray, about 1 month.

Cabbage is a vegetable that we eat more in our daily life, which is widely grown in our countryside, and pesticides are indispensable if we want to grow it well.

There are three stages in the growth cycle of bok choy, which are early, noon and late, and among these three stages, the insect pests that are easy to breed are slightly different. In the early days, the cabbage had young leaves and was susceptible to gnawing by jumping beetles, so we could spray 20% acetamiprid. Pyridoxine suspension.

In the middle of growth, it is easy to breed slugs, snails, and green insect pests, if this kind of insect pests are breeded, tetraacetaldehyde granules can be sprinkled into the ground.

In addition, cabbage is also prone to aphids, gray mold, powdery mildew, and blight. In addition to the use of the above types of drugs, we should also pull out weeds and prevent heavy planting in management. In addition, it is necessary to pay attention to drought and flood prevention.

Cabbage fertilization management, when the soil moisture is insufficient, after the application of basal fertilizer, the soil should be watered to create moisture, and the main sowing method of Chinese cabbage in autumn is live seeding, and live broadcast is divided into two ways: strip sowing and hole sowing.

The sowing time of cabbage is generally in August 1-20, you can apply rotting organic fertilizer + microbial agent as base fertilizer, the fungus agent can choose more strains, such as 2 billion, 6 active bacteria, such a fungus agent has high activity, especially the addition of Trichoderma harzianum, the activity will be higher, such manure + 2 billion fungus agent as base fertilizer can be, such as Ribery Yanwo microbial bacteria can.

If the bottom moisture is insufficient, water it in time after sowing to ensure that the seedlings are strong. After thinning seedlings and setting seedlings, water 1 water each. Watering at the beginning of the rosette promotes the growth of the trees. During the balling period, watering should be carried out in combination with top dressing, and the amount of watering should be large and uniform. In the later stage, appropriate water control promotes the core wrapping.

In the process of planting, Chinese cabbage will also encounter a variety of pests and diseases, which have a great impact on the edible value and product value of Chinese cabbage, and these pests and diseases will cause the leaves of Chinese cabbage to wilt and rot, and in severe cases, it will lead to the extinction of Chinese cabbage.

1. Downy mildew.

It can occur at all sowing dates. Control methods: use disease-resistant varieties; Spray with 600-800 times of Redomil and 500-600 times of Dakoning.

2. Anthrax.

It mainly harms leaves and petioles. The leaves are infected, the initial gray-white or faded greenish water-stained spots, and then expand into round or nearly round gray-brown spots, and in the later stage of the disease, the lesions are grayish-white, translucent, and easy to perforate; The petiole is infected, forming an oblong or spindle-shaped to fusiform depression, grayish-brown, and ochre-red sticky matter is often found on the lesion when the humidity is high. The disease is a fungal disease of high temperature and high temperature, which occurs in the appropriate period from July to September, and is prone to disease under showers in high temperature weather.

Choy sum is mainly infected with leaves, while the leaves and petioles of Chinese cabbage can be infected. Anthrax is common in all vegetable farms in the summer, and it spreads very quickly.

Control methods: apply sufficient basal fertilizer before planting to avoid partial application of nitrogen fertilizer; Choose well-drained land for planting in high furrows, remove diseased leaves in time, and avoid planting too dense and unventilated; Spray with 1000 times of leaf spot net or 1500 times of Shibaogong, spray once in 5-7 days, and spray 2-3 times in a row.

3. Rhizoctonia leaf rot disease.

From June to August, the occurrence of high temperature and rainy weather is the most abundant, harming the leaves, at first it is a wet rot spot like water scalding, it becomes irregular after expansion, and it is gray-white after drying, and it is densely covered with arachnweb mycelium in the wet rot place, and then it becomes a brown sclerotia. The disease is easily contagious.

Prevention and control method: spray with 600 times of 25% carbendazim wettable powder or 800 times of 50% methyl tobuzine suspension.

Fourth, soft rot.

It is a bacterial disease, mostly immersed from the wound, initially translucent water stains, after 2-3 days it becomes gray or brown, the epidermis is slightly sagging, there is white bacterial mucus on it, and it emits a special odor after decay. It is easy to occur in high temperature and rainy conditions.

Control methods: Crop rotation with rice or melons and beans as much as possible; selection of disease-resistant varieties; Avoid partial nitrogen fertilization; Spray with 72% agricultural streptomycin 3000-4000 times.

5. Viral diseases.

If the seedling stage is damaged, the diseased leaves will be deformed, the growth will be severely hindered, and the plant will be dwarfed, which will affect the yield and quality.

Take comprehensive preventive measures: apply enough organic fertilizer before planting to eliminate the source of aphid infection, select disease-resistant varieties, and use direct seeding cultivation as much as possible.

Imidacloprid: 10% imidacloprid wettable powder 1000-1500 times liquid and acetamiprid agent alternately. Cypermethrin:

Use 2000 times of cypermethrin for spraying. Frost urea manganese zinc: spray 72% frost urea manganese zinc 600-800 times solution for cabbage.

Self-medicated agent: sweet and sour liquid is made from sugar, vinegar, liquor and trichlorfon.

1. Imidacloprid

If cabbage seedlings are harmed by aphids and whiteflies, 10% imidacloprid wettable powder 1000-1500 times can be used alternately with acetamiprid, sprayed 2-3 times in a row, with an interval of 7-10 days, and pay attention to spraying on the back of the leaves, which is the gathering place of pests.

2. Cypermethrin

When the cabbage is in the seedling stage, if it suffers from the gnawing of cabbage worms and noctuidae, you can use cypermethrin 2000 times and cyhalothrin 3000 times for alternate spraying, and the spraying time should be selected in the evening on a sunny day, and the drug is prohibited in the rainy season.

3. Frost urea manganese zinc

Cabbage seedlings are susceptible to downy mildew and soft rot, and after the plant is infected with downy mildew, 600-800 times of 72% frost urea manganese-zinc wettable powder and 1500 times of 25% di-noyylamide suspension should be used in rotation, while soft rot can be used with 4000 times of 72% agricultural streptomycin sulfate**.

4. Self-medicated agents

Pests at the seedling stage of cabbage can be booby-trapped with self-medicated agents, mix 3 parts of sugar, 3 parts of vinegar and 1 part of high liquor, add 10 parts of water, plus 90% of crystal trichlorfon, mix them evenly and put them in a large bowl, place one portion per 80 square meters of farmland, open it at night, and cover it during the day.

The use time of pesticides is not fixed, and it is generally necessary to use drugs for control according to the specific occurrence of pests and diseases.

If it is a pest, it is generally remedicated after the pest is found. If it is a disease, it can be prevented in advance, generally before sowing, use 50% Fumei double wettable powder, 65% zeb wettable powder or 40% seed dressing double wettable powder for seed dressing (the dosage is the weight of seeds, or use 45% ammonium dyssen water 300 times liquid soak for 20 minutes.

In addition to the use of medicines, plant ash can also be used to prevent pests and diseases. How to use: Moisten the vegetable seedlings, wait until the water is half dry, and sprinkle the plant ash near the root system of the cabbage seedlings (about 3-5cm away).

The cabbage watering technique is as follows:

1. If the soil moisture is poor, it should be watered after fertilization and before land preparation. If there is no time to create moisture, it should be watered in time after sowing to ensure that the seedlings are full and strong (during germination, the relative humidity of the soil is kept at about 85-90%).

2. During the seedling period, water once after the seedling and after the seedling setting (during the seedling period, the relative humidity of the soil is kept at about 80-90%).

3. During the rosette, you need to squat seedlings (the squatting time is generally about 7-10 days), about 10 days before the heart, temporarily stop watering, promote the root system of cabbage to grow deep in the soil, absorb more water and nutrients, and stop squatting seedlings when the soil moisture content is about 16% (during the rosette, the relative humidity of the soil is kept at about 75-85%).

4. When the cabbage begins to wrap the heart, water it once, continue to water it once after 2-3 days, and then water it every 5-7 days (during the core wrapping period, the relative humidity of the soil is kept at about 85-94%).

5. Stop watering about 10 days before harvest.

When the cabbage grows, there will be some pests and diseases such as powdery mildew, which need to be sprayed in time to prevent and control the golden century, and when growing, it will produce fruit drop because of the cause of pests and diseases, sodium naphthalene acetate can be used, according to a certain amount can play a role in protecting flowers and fruits, and there should be a good ventilation environment in ordinary times, so as to reduce the occurrence of pests and diseases.

Chinese cabbage growth cycle.

When the cabbage grows, there are usually five growth stages, namely germination stage, seedling stage, rosette stage, bulb stage and dormancy stage, when growing, there should be sufficient sunlight, as well as good fertilizer and water management, and a good ventilation environment to prevent the occurrence of pests and diseases.

Medium cabbage spraying.

When the cabbage grows, there will be some pests and diseases such as powdery mildew, if there are no good treatment measures, it will be lurking in the soil and diseased residues for winter, and then it will cause harm in the second year, and it is necessary to spray Jinshi and other pesticides in time for prevention and control.

Cabbage to keep flowers and fruits and spray.

When the bearded cabbage is growing, it will produce fruit drop due to diseases and pests, and sodium naphthalene acetate can be used, which can play a role in protecting the pants and high flowers and fruits according to a certain amount.

Baby cabbage spraying grows fast.

Cabbage can use a small amount of plant growth agent, so that the growth rate will be faster, but vegetables generally grow naturally the best, and general vegetables are originally fast.

Baby cabbage medicates flowering.

When the cabbage grows, you can add organic fertilizer, phosphorus and potassium fertilizer to make the flowers big and bright, and can prolong the flowering period without spraying.

Cabbage sprayed to prevent insects.

When the cabbage is growing, it mainly has aphid insect diseases, and it is necessary to use 1% insecticide 3000 times solution for control, so that it can grow normally.

Chinese cabbage pest and disease prevention.

When the cabbage is growing, you can release some aphid wasps to control pests and diseases, and there should be a good ventilation environment during the maintenance period, which can reduce the occurrence of pests and diseases.

Cabbage cultivated well with an average yield of about 2,500 kilograms per mu, generally after the emergence of seedlings, in order to prevent the invasion of pests and diseases, you can sprinkle some plant ash before the dew in the morning, spray high-efficiency and low-grade pesticides, such as trichlorfon, phosphine, chloride, etc., which can effectively control pests such as cabbage green, maggotsIf there is a disease, it can be controlled with anker, manganese, zinc, iprodione and other agents. Note that warning signs should be set up on the plots where Shi Lingxun has used pesticides, and grazing and picking should be prohibited within 24 hours after application.

Cabbage spraying.

The average yield per mu of cabbage is about 2500 kg, and the yield is mainly related to the fertility of the soil, fertilization, climate and variety.

Cabbage is generally sprayed with high-efficiency and low-grade pesticides, such as trichlorfon, phosphine, dichloride, etc., which can effectively control pests such as cabbage greens and maggots.

Bok choy pesticide time.

Generally, after the cabbage emerges, in order to prevent the invasion of pests and diseases, you can sprinkle some plant ash before the dew falls in the morning. Grass ash contains potassium, which is beneficial for the growth of cabbage seedlings.

After the cabbage seedlings are pested, they should be sprayed with insecticides in the afternoon, because the insecticide sprayed in the afternoon has a high temperature, is volatile, and has low efficacy. At the same time, for many pests who like to eat and sell at night, such as ground tigers, thrips, etc., the control is more effective.

Chinese cabbage pest control drugs.

1. Disease spraying:

Common diseases of Chinese cabbage are downy mildew, black spot, black rot, sclerotinia disease, virus disease, black shin disease, etc., from the seedling stage of Chinese cabbage to begin to disease, in line with the principle of prevention first, supplemented by treatment, from the seedling stage of cabbage can be used to prevent.

The available agents are anker manganese-zinc, iprodione, wuyixin, carbendazim, morpholinoguanidine, etc.

2. Pest spraying:

Common pests of bok choy include diamondback moth, aphids, noctuidae pests, jumping beetles, etc.

Attention should be paid to prevention and control at the seedling stage of cabbage, and drugs should be prohibited 10-15 days before harvesting. The available agents are pyrethrins, fipronil, imidacloprid, acetamiprid, avermectin, Bacillus thuringiensis, Beauveria bassiana, oleanogenin, emamectin salt, fenozazide, spiromel ethyl, matrine, etc.

3. Contraindications for pesticide use:

1. Warning signs should be set up on the plots that have been applied with pesticides, and grazing and picking should be prohibited within 24 hours after application.

2. After the unfinished liquid medicine (powder) is approved by the pesticide label, the remaining liquid medicine can be used again. A small amount of residual liquid should be properly disposed of.