Water spinach suffers from white rust, what medicine should be used?

Water spinach has white rust, which mainly produces lesions on the back of the leaves, and the front of the leaves will appear pale yellow or yellow spots at first, and then gradually turn brown, and the lesions will become larger, and the back of the leaves will also grow round or oval white blisters. 1. Select fields with high and dry terrain, and cultivate deep furrows and high furrows, and there will be no water accumulation when the rain stops. 2. After sowing, use a nurse to cover the soil, and spray an insecticide before transferring, which is an important measure to prevent and control pests and diseases; 3. The organic fertilizer used should be fully decomposed, and should not be mixed with the residues of the crop.

White rust refers to a disease that is prone to occur during the planting period and is fungal. In fact, the plant is sick, the leaves of many green vegetables are easy to be infected, light green dots can be seen on the leaf surface, which will gradually develop into yellow round lesions, and white blisters grow at the lesions on the back of the leaves. If you cut and harvest frequently, you can avoid insects.

If there are bugs. Sprayed with garlic liquid, chili liquor and white vinegar, the effect is still very ideal.

Water spinach has strong adaptability and can be planted in various environments, but because it likes fertilizer and water, it is best to choose loam soil with more clay weight and strong water and fertility retention. According to the moisture-loving and fertilizer-tolerant characteristics of water spinach, water spinach can be planted in a place with fertile soil and close to water sources, which can be planted and sown or cuttings. Because cuttings are relatively troublesome, most growers use seed sowing.

Generally speaking, water spinach likes a warm environment, the suitable outside temperature for growth is between 15 35, higher than 35 or lower than 10 slow growth and the stem fiber increases and thickens, the taste is very poor, the northern planting can be sown in April and August, and the south can be sown in March and July. It was well promoted. Water spinach is a vegetable with low pest and disease effect.

In the field management, only one or two sprays of low-level insecticides can be used to get a good harvest.

Enoylmorpholine, manganese zinc frost urea, manganese zinc methyl frost, downy mildew carb hydrochloride, ethyl phosphorus aluminum manganese zinc, downy mildew pesticides. These drugs can be used to prevent white rust.

Frost urea manganese zinc should be used, this drug has a very fast effect, and the effect is 5 times that of ordinary drugs, so it should be used.

We need to spray with 5% potassium permanganate solution, and then ventilate in time, be sure to water more.

This is a new form of bacterial virus, Guangdong here about 2015 was discovered, the contagion is very strong, at the beginning is a small blister blue spots, there is no medicine to treat, such as blowing a few days of dry north wind naturally better.

It seems that the red spider is a pest, look at the back of the leaf and check if there is a red spider infestation.

I am distressed, I can't cure it after exhausting all the medicines, and now it is a high-incidence period, and I can't get a single dish.

Sorry, I just saw it, but I couldn't help. From the ** it seems that 1, only harm the leaves?

2. Small yellow spots in the early stage, basically along the leaf veins?

3. Browning with yellow halo in the middle stage?

4. In the later stage, multiple spots are connected together to cause leaf rot, and no mold layer can be seen?

25% Pyraclostrobin (Kairun) – Mainly for Brown Spot?

Baitai - mainly for white rust?

To sum up, it is recommended to try Chunleimycin (plus rice).

My water spinach here also has this disease, I don't know how**.

Is there a clearer **, it feels a bit like white rust, but it is difficult to judge if you can't see it locally.

It is thought to be caused by Fusarium or Anthracnose.

You have too much humidity in your field and a high planting density, right?

Pay attention to ventilation and try fungicides, carbendazim, Dasheng and the like.

It's serious now, what's the solution.

Water spinach can be grown hydroponically or by cuttings in our south, but most of them are grown from cuttings. Water spinach is afraid of drought, it is a dryland crop that needs more water, if it is planted by cuttings, the soil should be kept moist, but it can not be waterlogged, can not accumulate water, and can not soak the roots for a long time. The yellowing of the leaves of water spinach is related to the influence of fertilizer, abnormal water humidity, insufficient light intensity, and the influence of pests and diseases.

Growers should adjust the amount of watering and fertilization according to the actual situation, so that water spinach can receive bright and sufficient scattered light, and do a good job in pest control.

Lack of fertilizer and excessive fertilizer application are one of the main causes of yellowing of water spinach leaves. Long-term lack of fertilizer, lack of nutrients in the soil, thin branches, yellow and thin leaves. Excessive fertilization, the old leaves begin to burn yellow and fall off, farmers should spray 30% green Debao 400 times liquid at the beginning of the disease according to the specific condition of water spinach yellow leaves, 500 times of 60% copper succinate fertilizer, 300 times of 14% copper ammonia, 1 1 200 times the amount of Bordeaux solution, 30 40 grams of mycloconazole, 70% of propylene zinc (Antaisheng) 150 200 grams of mu,.

It is recommended that farmers adjust the amount of watering and fertilization, so that the water spinach can be nourished by bright and sufficient scattered light2Prepare sterilization and insect control agents, and you can respond in time when pests and diseases attack. At the beginning of the disease, spray 30% green debao 400 times solution, 60% copper succinate fertilizer 14% copper ammonia 300 times solution, 1:

1: 200 times Bordeaux liquid, 30 40 grams of mycloconazole, 150 200 grams of 70% propylene zinc, 600 times of 50% copper methyl frost.

Water spinach does not have strict requirements for light conditions. The demand for water and fertilizer is very large, in addition to the application of sufficient base fertilizer, but also a large number of top dressing, each picking 1 time top dressing 1-2 times, top dressing concentration should be light and then thick, mainly nitrogen fertilizer. Drought and fertilizer deficiency both affect yield and quality.

Choose a field with relatively high ground so that the field does not accumulate water when it rains. Be sure to spray insecticides before transplanting to control pests. The organic fertilizer used must be well-rotted, and it is best not to mix it with plants with stubble.

We must pay attention to drainage, but also pay attention to sterilization, prevention in advance of the onset period, but also pay attention to fertilization, pay attention to management skills, pay attention to the time of planting, but also pay attention to the choice of temperature, and so on.

First of all, when planting, you must choose the land with relatively fertile and wide soil, and in the process of fertilization, you must choose farmhouse fertilizer, and do not use fertilizer bought outside. And also to water more, to prevent the occurrence of pests and diseases, if there are small bugs, then be sure to spray insecticides.

Spray some insecticides and let them kill the bugs, so that the water spinach can grow lush and fruitful in the fall.

First of all, it should provide a suitable environment for growth, secondly, it should keep the soil fertile, and it should also be suitable for the problem, spraying some pesticides regularly, and also doing a good job of preventing insect pests.

I think when planting cabbage, we must water more, and at the same time, we should also apply more fertilizer, so as to prevent hollow cabbage rust, and only in this way can we make cabbage grow enough, and at the same time there will be more nutrients and yields, and when planting, we try to spray some pesticides to avoid harmful insects entering.

Continuous cropping must be prohibited in order to effectively control diseases and to allow the land to rest. It is also necessary to expose the soil to the sun, select very good seeds, and spray pesticides on time to prevent diseases.

What are the conditions for the onset of water spinach white rust? Water spinach white rust control measures.

Water spinach white rust, the main damage to crops is water spinach, the disease is manifested in the front of the leaf initial appearance of light yellow to yellow spots, the key point of prevention and control is to pay attention to field stains, sparse plant ventilation.

So what are the conditions for the onset of water spinach white rust?How to prevent and control water spinach white rust?Today, I will share with you the pathogenesis conditions and prevention measures of water spinach white rust, let's take a look!

Conditions for the occurrence of water spinach white rust.

1. Continuous cropping land, serious disease in the previous cropping, many bacteria in the soil, or low-lying waterlogging, poor exhaust, or heavy viscous quality, and acidic soil.

2. Excessive application of nitrogen fertilizer, too dense cultivation, depression between plants and rows, and no ventilation and light transmission.

3. Seeds with bacteria, nutritionists for seedlings, and organic fertilizer are not fully decomposed or with bacteria.

4. Early spring rain or mildew rain comes early, the climate is warm and the air humidity is high, and the autumn season is rainy, foggy, re-dew or cold snap is easy to get sick early.

5. Greenhouse cultivation is often done in order to keep warm without ventilating and draining moisture, which causes excessive humidity and is prone to disease.

Water spinach white rust control measures.

1. Select fields with high and dry terrain, and cultivate deep furrows and high furrows, and there will be no water accumulation when the rain stops.

2. After sowing, use a medicator to cover the soil, and spray an insecticide and fungicide before transferring, which is an important measure to prevent and control pests and diseases.

3. The organic fertilizer used should be fully decomposed, and should not be mixed with the residues of the crop.

4. The nutrient soil for water and drought rotation and seedling cultivation should be made of sterile soil, and it should be dried for more than three weeks before use.

5. Greenhouse cultivation can be used in the summer fallow period, irrigation in the shed, covering the ground with mulch, closing the shed for a few days, and using high temperature sterilization.

6. Choose disease-resistant, coated seeds, if not coated, sterilize with seed dressing agent or soaking agent.

7. Reasonable dense planting, timely removal of diseased branches, diseased leaves, diseased plants, and take out of the field to burn, diseased holes or quicklime.

8. Mulching cultivation can prevent and control the aboveground plants caused by pathogens in the soil.

<> The causative bacterium of water spinach white rust is the genus Rust of the subphylum Flagellates. The pathogen mainly overwinters with oospores left in the soil and manure or adheres to the seeds, and a few survive the winter in the host rhizome with the fungus dispersed silkworms. Under suitable conditions, oospores will directly germinate and infect, such as sporangia and zoospores, which will invade and cause disease from the stomata of young leaves.

1. Sowing seeds in land preparation, reasonable crop rotation, timely removal of crop residues from previous crops, ploughing and drying as soon as possible, cleaning the pastoral, deep ploughing the field, watering and moisture conservation, and applying sufficient base fertilizer (4000 5000 kg of high-quality decomposed organic fertilizer, 25 kg of diammonium phosphate, 20 kg of potassium chloride per mu);Sow seeds in a timely manner after dressing with new high-fat film, and sow an appropriate amount of sowing when sowing, and use a tooth rake to lightly rake the topsoil to sow the seeds into the soil.

2. Seedling management, seedlings are full, seedlings should be carried out at the cotyledon stage, pull the cross stage, 3 4 leaf stage for seedlings, seedlings should be watered and topdressed in time (pay attention to nitrogen fertilizer content) after seedlings are replenished, to prevent wilting due to the shaking of seedling roots. Timely spraying of 800 times of the new high-lipid membrane can effectively prevent bacterial infection, improve the ability to resist natural disasters, improve the intensity of photosynthesis, and make the seedlings grow healthily.

3. Transplanting and planting, before transplanting, the field should be watered thoroughly, apply sufficient base fertilizer (1000 kg of well-rotted pig and cow manure per mu, pay attention to balancing the nitrogen, phosphorus and potassium elements in the soil), transplant in a timely manner, plant reasonably densely, water immediately after planting, and spray the new high-lipid film 800 times liquid in time (effectively prevent the water on the ground from evaporating, the seedling water does not transpiring, shorten the seedling period, and make the seedlings quickly adapt to the new environment) after watering once a day in the morning and evening, for 3-4 days.

4. Field management, after the end of the seedling period, should be timely cultivated to protect moisture, watering and topdressing (15-20 kg of compound fertilizer per mu, 15-20 kg of urea per mu and 10 15 kg of superphosphate per mu at the rosette stage), and cooperate with the spraying of 800 times of the new high-fat film to improve the utilization rate of fertilizer; Spraying strong stems at the rosette stage of Chinese cabbage can make the plant stem thick, the leaves are thick, the leaf color is fresh and tender, the plant is lush, and the natural taste is strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual toxicity.

5. Disease prevention and control: The three major diseases of Chinese cabbage refer to downy mildew, soft rot and virus disease.

Chinese cabbage soft rot is commonly known as "rotten pimple" and "rot disease", and streptomycin sulfate or agricultural streptomycin + new high-lipid film 800 times liquid spraying for prevention and control; Viral diseases are mainly transmitted by aphids, which can be effectively controlled as long as they are well controlled. It can be sprayed with aphid lice net + 800 times of new high-fat film. For those who have been infected and begin to show symptoms, they should be uprooted and destroyed in time, the source of the disease should be controlled, and the robust strains should be sprayed with 20% virus A500 700 times solution, once every 5 7 days, 2 3 times in a row; Downy mildew is an airborne disease that requires high humidity to occur and spread.

Therefore, the prevention and control of the disease should focus on controlling humidity, removing diseased leaves and central diseased plants in the early stage of the disease, and spraying with 68% Jinlei, 72% Kelu wettable powder, Xiaokuaijing or 40% ethylphosphine aluminum wettable powder + 800 times of new high-lipid film in a timely manner, spraying before or at the beginning of the disease, once every 10 days, 2 3 times in a row.

1. Alternate crop rotation with non-cruciferous vegetables, such as spinach - kale - broccoli - Brussels sprouts - cauliflower - amaranth - leeks - Artemisia annua - celery - cowpea, etc.

2. After the vegetables are harvested, remove the diseased residues in the field to reduce the source of bacteria.

3. At the beginning of the disease, spray 800 times of 25% methalene wettable powder, or 600 times of 50% methasic copper wettable powder, or 500 times of 58% methalene-zinc wettable powder, or 500 times of 64% alum wettable powder, spray 50 60 liters of liquid per mu, once every 10 15 days, and prevent and control 1 to 2 times.