Teachers, what is the disease of this water spinach, and what is the special medicine, please advise

For white rust of bracken, it is recommended to use enoylmorpholine or manganese zinc or manganese zinc or metalene manganese zinc or downy mildew hydrochloride or ethylphosphine aluminum-manganese-zinc and so on alternately (downy mildew pesticides can also prevent and control white rust), the leaves are smooth and non-sticking, and it is best to mix silicone additives.

Prevention first, comprehensive prevention and control. Use pesticide ingredients alternately, and do not use the same pesticide ingredients consecutively. This is the principle of crop protection.

There are several types of water spinach diseases:

1.Water spinach white rust: It mainly damages the stems and leaves of the plant, and produces many white or yellow spots on the back of the leaves, followed by browning and large patches.

Leaf spots can be raised, causing the leaves to fall off in severe cases. The seeds can be soaked in warm water for about 30 minutes before sowing. If a disease is found, it can be irrigated evenly with a chemical such as methametha.

Spray about 4 times a month.

2.Brown spot disease of water spinach: At the beginning of the disease, small yellow-brown spots appear on the leaves, which continue to swell until all the spots on the leaves join together, causing the whole leaf to die.

It is recommended to deal with the diseased plants in time and burn them together to reduce bacteria**. Seeds should be sterilized or disease-free seeds should be selected before sowing, and good drainage and ventilation should be observed. The results showed that the disease could be sprayed once a week for 1 month with manganese-zinc dry suspension powder and other agents within 5 days before harvest.

3.Water spinach root rot: It mainly harms cabbage roots, causing root rot and affecting yield.

At the beginning of the disease, the whole plant wilts, the roots turn yellow, and gradually sink, eventually causing the whole plant to wilt. Spray evenly with agents such as thiophanate-methyl wettable powder, and stop spraying about five days before harvesting.

The above are the three diseases that need to be paid attention to in the process of water spinach planting and their corresponding special medicines, I hope it will help you.

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.

Anthrax. Onset symptoms.

The leaves produce brown pits in the early stage, which later expand into round or irregular spots. In severe cases, there is gangrene in the center of the spot.

Prevention and control methods. Reasonable dense planting, increase light, improve ventilation and drainage conditions. Cultivate strong seedlings, do not move the plants frequently, and avoid human injuries and diseases.

Cut off the diseased leaves and apply the wounds of the plant leaves with chlorothalonil or carbendazim 1000 times. Spray methyl tobuzin or carbendazim 1000 times a week.

Mosaic virus disease.

Pattern of onset. The host range is very narrow, and it is transmitted by contact with the diseased strain of sweet potato shrimp, but the harm is very serious, and it is easy to cause devastating harm, and it is difficult to **.

Prevention and control methods. It is a healthy plant ramification. To prevent mechanical infection, it is best to disinfect the knives. Bizhou Zhao finally operates, isolates, and destroys the infected strains.

Soft rot hand rental.

Onset symptoms. In the early stage, bacteria invade the leaves or heart leaves to produce water-stained lesions, which expand rapidly and contain a lot of water. In the later stage, the diseased leaves turn yellow and fall off, and the whole plant is soft rot and dies. This disease spreads very quickly and must be prevented as soon as possible.

Prevention and control methods. Improve growing conditions, increase ventilation, reduce temperature and humidity; Cut off the affected area, apply antibiotic powder, and do not water for a week to stop the spread of the disease; Streptomycin 1000 times, stone sulfur mixture 500 times or Bordeaux solution are sprayed once a week.

Leaf blight. Onset symptoms.

Small black spots appear on the thick tips of the leaf traces, which gradually expand into irregular spots. The spots are dark brown on the periphery and grayish-brown in the middle. In severe cases, all the leaves will be spread out, and eventually the leaves will wither and fall off.

Prevention and control methods. Cut off the diseased leaves, spray methyl tobuzin or 1000 times of good life; Infected plants should be sheltered from rain or hung to prevent aggravation of the disease; Spray 1000 times the liquid of the good organism once a week to prevent infection.

Water spinach can be harvested after about 50 days of planting, and a stubble is harvested to chase a stubble of fertilizer. At the same time as watering, the fermented sesame cake is diluted and poured into the water spinach, and the effect is very good. All water spinach planted with chemical fertilizers, there is no such fragrance, sometimes feel that ammonia water spinach is the most suitable to grow in a high temperature and humid environment, the temperature to 28 when the growth is the most vigorous, the conditions are suitable for picking time shortened, can greatly improve the yield.

Let's give a detailed introduction to the planting methods and pest control methods of water spinach.

Water spinach can be seeded or cuttings. Because cuttings are relatively troublesome, most growers use seed sowing. Warm, moist, fertile soil.

Water spinach can be planted in our Enshi area generally from late April to October Water spinach likes high temperature and high humidity environment, likes fertilizer and waterlogging, avoids heavy stubble planting, selects fertile soil, low-lying clay heavy, sunny soil, apply enough rotten organic fertilizer, suitable for phosphorus and potassium fertilizer, the south can be sown in the paddy field, and the north can be sown in the low-lying place of the vegetable garden.

Secondly, when it comes to the seedling growth period, the seedlings can be appropriately thinned at this time to promote the growth of water spinach seedlings. Water spinach has a greater demand for fertilizer and water during the growth period. When the seedlings of water spinach grow to 7cm, they are topdressed at home, and after surviving, make water manure or chemical fertilizer, and pinch and pick the younger brother once when they grow to more than 20 cm.

Pick once on a fertilization, top dressing must be careful, and wait for the pinch injury to dry before fertilizing to prevent disease. If you rush the price early, you can also directly take it all and sell it.

When the seedlings grow to 6 7 cm, they should be topdressed, and the method of spraying is used with well-rotted farmhouse fertilizer, so that the water demand of water spinach is also ensured while topdressing. When the true leaves have grown to four, they can be topdressed again, and the planting ground is ploughed before sowing, and then evenly sprinkled on the soil surface with plant ash. After soaking the Yongcai seeds in warm water for about 30 minutes, then soaking the seeds in water for 24 hours, drying them after scooping them up, and spreading them directly to a better field.

First of all, we should not water too much water when planting, and secondly, we should let these vegetables grow slowly, and we should also sprinkle some pesticides when fertilizing, so that we can kill bacteria well.

Before planting, add some insecticidal pesticides to the soil, and then spray a layer of pesticides after planting, and pay attention to its growth at any time, and spray it as soon as it appears.

Pesticides should be sprayed in a timely manner, and sun protection should also be done, and soil permeability should also be maintained, and water and fertilization should be done in a timely manner, water and fertilizer management should be done, and sufficient sunlight should also be ensured.

Water spinach generally takes 3-4 weeks to grow, and the yield per mu is about 6000 7000 catties. Usually pay attention to the prevention and control of pests and diseases in order to increase the yield, and the general insecticide time is in the seedling growth period, the time is about a week, it usually occurs such as wheel spot disease and other diseases, the same amount of iprodione can be sprayed 3-4 times every 7-10 days, you can ** round spot disease. Note that pesticides should not be dispensed with sewage or well water, otherwise they will be cleared and reduce the efficacy.

Water spinach spraying.

Overall, the yield per mu of water spinach cultivation in season is about 6000 7000 catties. Whether water spinach can be insecticide-planted generally depends on whether pests and diseases occur during the planting process, and if diseases occur, they should be sprayed in time.

Water spinach pesticide time.

Water spinach is generally insecticide-injected during the seedling growth period, and it takes 3-4 weeks to grow into water spinach, and it is about a week to be insecticide-sprayed.

Water spinach pest control drugs.

1. Disease spraying:Common diseases of water spinach include wheel spot disease, etc., which can be sprayed 3-4 times every 7-10 days with iprodione, mancozeb, and methylthiosulfur.

2. Pest spraying:Common pests of water spinach are aphids, cabbage moths and cabbage worms, which can be controlled by aphid Kechuan batches of insects or dimethoate emulsifiable concentrate in an alternate spray mode. Diamondback moth and heartworm can be alternately used with 5 sharp jin osmotic pre-suspension agent or cyanamine vinegar.

3. Contraindications for pesticide use:Water spinach pesticides should not be dispensed with sewage, which will reduce the efficacy. Well water should also not be used for preparation, because minerals such as calcium and magnesium in the well water will react with the liquid and precipitate, thereby reducing the efficacy of the medicine.