What is the disease of eggplant leaves with red spots, wrapped in leaves, and not flowering?

<> common solutions to eggplant leaf curling disease: rush to apply rooting and root-raising fertilizers, including search for such as root Baojia Diliwang, etc., while enhancing plant resistance, foliar spraying of R. solanacearum and Finch old Wofengsu, calcium is old and boron has a good effect, can be sprayed 2 to 3 times at an interval of 7 for 10 days.

In the process of planting eggplant, some novice growers may not know how to deal with it, such as the problem of eggplant rolling leaves, which will seriously affect the quality of eggplant, so what should I do if I get leaf curling disease?

First of all, because of the lack of nutrients caused by eggplant leaf rolling, eggplant wants to grow normally must need a certain trace elements, if the lack of these nutrients, the most common reaction is the situation of leaf rolling, at this time it is necessary to apply more organic fertilizer, generally every 667 square meters to apply more than 5000 kg of fully decomposed farm fertilizer, foliar spray containing a variety of trace elements of foliar fertilizer, 5-7 days spray once, spray 2-3 times, can effectively alleviate the symptoms of deficiency; Secondly, because of the curling of leaves caused by virus diseases, you can choose to spray 500 times of 20% virus wettable powder or 1000 times of phytolingling emulsifiable concentrate or 1000 times of potassium permanganate, etc., which has a certain inhibitory effect.

Eggplant leaf curling disease is mainly caused by the lack of trace elements and viruses, you can spray trace elements and inhibition of virus drugs on the leaf surface to prevent the occurrence of leaf curling disease, but also strengthen field management, moderate ventilation and light transmission, reduce field humidity, can reduce the degree of harm.

This is one of the series of symptoms caused by eggplant cotton blight. The disease is one of the three major diseases in the production of eggplant, it occurs in various places, and can be damaged throughout the growth period, and the damage is more serious in rainy years, which can generally cause losses of 20% to 30%, and serious can be as high as more than 50%. The disease mainly damages fruits, leaves, stems, flowers and other parts.

Seedlings and adult leaves are infected, and water-soaked irregular dark green or purple-brown lesions are produced on the leaves, with ring patterns, and sparse white mold is born on the lesions when the humidity is high. The stem is damaged, and the base of the stem is water-stained and shrinking, sometimes breaking and necrosis, causing cataplexy. The fruit is damaged, and there are water-stained round lesions on the fruit surface at the beginning of the disease, slightly concave, yellow-brown or light brown, and in the case of high humidity, dense white cotton wool is produced on the surface of the diseased part, and the flesh is black-brown and rotten, and the diseased fruit is easy to fall off or shrink into a stiff fruit.

The pathogen is called Phytophthora parasiticus, a fungus of the subphylum Flagellates. Spread by soil and rainwater. The mycelium develops well when the temperature is 28 30 and the relative humidity is above 95%.

The disease is prone to occur under the conditions of high temperature and high humidity, sunny weather after rain, low-lying terrain, heavy soil clay, partial application of nitrogen fertilizer, continuous cropping and heavy cropping, extensive management, and excessive density.

Prevention and control methods. 1.Implement crop rotation and stubble for more than 2 to 3 years, remove the residues of diseased plants such as diseased leaves and fruits in the field in a timely manner, and destroy them in a centralized manner to reduce the source of bacteria.

2.Increase the application of fully fermented and well-rotted organic fertilizer, and fertilize according to the ratio of nitrogen, phosphorus and potassium::, so as to enhance the disease resistance of plants.

3.Seed treatment: 10 ml of fludioxonil suspension seed coating agent + 2 ml of 35% fine nail cream emulsified seed coating agent + 4 kg of water 150 200 ml coated seeds, or 68% refined nail cream and manganese zinc water dispersible granules 600 times liquid soaked for 30 minutes and then germinated and sown.

4.Pharmaceutical spray control: 68% refined nail cream, manganese-zinc water dispersible granules 450 times liquid + 50% chlorobromoisocyanuric acid wettable powder 750 times liquid, silver farry (fluorobacteria, downy mildew) suspension 600 times liquid + cuprous oxide wettable powder 1500 times liquid, powerful 1+1 stubborn downy mildew, special for blight (20 grams of powder + 25 ml microemulsion) 333 times liquid.

1. Choose disease-resistant varieties.

2. Do a good job of seed disinfection. Soak in 10% aqueous solution of trisodium phosphate, or 400 times of potassium permanganate, for 30 minutes, rinse the liquid medicine on the seeds repeatedly, and then soak the seeds to promote hunger and germination.

3. Use containers for root protection and seedling, and do a good job of avoiding aphids during the seedling period, and at the same time sprinkle irrigate the disease Laling virus K (anti-disease), anti-poison No. 1, 83 anti-drug agent and phyto-disease spirit and other agents to improve the immunity of plants to viral diseases; Scientific application of fertilizer and water to ensure the healthy growth of plants.

4. After colonization, regularly spray 500 times of 20% virus A wettable powder, virus Bike, etc. for prevention.

5. In the early stage of the disease, in addition to continuing to spray 20% virus A wettable powder 500 times regularly, virus bike and other prophylactics, it is best to spray 2% bacterial gram (Ningnanmycin) 200 times.

It should be the brown streak disease of eggplant, and the management of cultivation and fertilizer must be strengthened.

Eggplant top dressing is important.

First, the amount of one-time fertilizer should not be too large.

Eggplant has a great demand for nitrogen fertilizer in the full fruiting period, but under high temperature weather conditions, the fertilization method of "small amount and multiple times" should be adopted, and the one-time application amount should not be too large.

Generally, top dressing is done once in about 7 days, and 10 15 kg of urea is applied per mu each time.

2. Do not apply with water.

Many vegetable farmers have the habit of applying chemical fertilizers with water, but this method is not suitable for high temperature weather conditions in summer.

Because of the high temperature, nitrogen fertilizers, especially ammonium bicarbonate, are easy to decompose and volatilize, and the ammonia produced by decomposition.

It not only reduces the fertilizer efficiency, but also easily causes eggplant ammonia poisoning.

Therefore, when applying fertilizers such as urea and ammonium bicarbonate, it is necessary to take furrow application or hole application.

3. Match fertilization.

When topdressing, it is not possible to apply only nitrogen fertilizer every time. In the full fruit period, phosphorus and potassium fertilizer should be applied 2 or 3 times, and it is best to use Yanwo water-soluble fertilizer to meet the needs of eggplant growth and fruiting, and can also play a role in improving the quality of eggplant fruit.

Eggplant mosaic disease is mainly an infectious pathogen, and the fungus mainly overwinters on the ground in the body of the diseased residue with mycelium, and produces conidia in the second year. The prevention and control measures are:1

Choose more disease-resistant varieties, or choose disease-free seeds or disease-free seedlings. 2.Strengthen fertilizer and water management and thoroughly remove weeds in the field.

3.Aphids should be controlled during the seedling period, and resistance agents should be sprayed regularly to improve the disease resistance of plants. 4.

Timely prevention and treatment in the early stage of the disease.

Eggplant leaf spot is a bacterial disease. It mainly harms leaves, petioles and young melons. Eggplants can be damaged throughout the growing season, with sporadic diseases.

The susceptible leaves are water-soaked light brown depressed spots, and the dorsal surface of the leaves is light gray dip spots at the beginning of the disease, and gradually changes to light brown necrotic spots. Select excellent varieties to soak seeds and promote germination. Soak the seeds in cold water, add hot water appropriately, keep the water temperature at 55-75, keep stirring when pouring hot water, keep heating water when the water temperature drops, hold for 5-8 minutes.

Causes of eggplant mosaic disease: CMV and TMV are the main viruses in the field, which can damage a variety of vegetables and weeds in the field. The source of the virus is extensive, the specific virus**, and the transmission route is the same as tomato fern leaf disease and tomato mosaic disease.

Generally, high temperature and drought are conducive to the occurrence of diseases. Extensive management, continuous stubble of Solanaceae vegetables, many weeds, large occurrence of aphids or untimely aphid control are all serious.

Key points of eggplant mosaic disease control technology: Choose more disease-resistant varieties, such as Liaojia No. 1, Liaojia No. 3, Heiyouliang, etc. Use disease-free seeds.

Generally, seeds should be soaked in 10% trisodium phosphate solution for 20 minutes. Disease-free seedlings. Timely planting to promote root extension.

Strengthen fertilizer and water management and thoroughly remove weeds in the field.

The reasons for this are extensive management, continuous stubble of Solanaceae vegetables, many weeds, large occurrence of aphids or untimely aphid control. The control technology is to select more disease-resistant varieties, such as Liaojia No. 1, Liaojia No. 3, Heiyouliang, etc. Use disease-free seeds.

Generally, seeds should be soaked in 10% trisodium phosphate solution for 20 minutes. Disease-free seedlings. Timely planting to promote root extension.

Strengthen fertilizer and water management and thoroughly remove weeds in the field. Farming operations in the field, separate operation of diseased and healthy plants to avoid human transmission. Aphids should be controlled at the nursery stage.

Early and continuous control of aphids after colonization.

Spotted defoliation on eggplant is one of the more serious diseases on eggplant in recent years, mainly after the Spring Festival.

1. Symptoms: At the beginning, there are a large number of spots on the middle leaves, generally the spots on the lower leaves are larger, gradually larger, with wheel lines, mainly brown spots, and the spots on the upper leaves are smaller, generally black, this disease appears defoliation when it is serious, affecting the normal growth of eggplant.

2. Disease diagnosis: This is a fungal disease, which is a kind of eggplant spotted defoliation, which may be one of the many diseases such as brown spot (also called ring disease), spot blight, brown streak, black blight, brown star disease, etc., which will appear after developing to a certain extent, which is extremely harmful to the normal growth of eggplant. These spots in the ring disease, brown star disease, spot blight and other diseases, generally not easy to distinguish, this scum disease is fungal disease, in the case of high temperature, high humidity is easy to occur, such as after watering or rain, and this kind of disease has the characteristics of sudden, explosive, once it occurs, it is possible to be infected with such diseases in the whole shed overnight.

This kind of disease is more harmful, affecting the photosynthesis of eggplant, the leaves are easy to age, and it is easy to fall leaves, commonly known as the "spotted defoliation disease" of eggplant. When there is a lot of leaf drop, fruit drop may also occur.

3. Solution:

Control the air humidity in the greenhouse. It is not suitable for flood irrigation, but it is necessary to water frequently with small water, and you can pull a small amount of water from the north to the south of the shed to avoid rooting, so that the eggplant's ability to resist stress is reduced, and it is easy to be infected with diseases.

Check in for the weather forecast in time, and if the next day is cloudy when watering, you can't water today.

Amplify the wind after watering. After watering, turn on the strong wind to let the moisture in the greenhouse be discharged as much as possible, which can effectively reduce the occurrence of such diseases.

Cultivating strong plants. You can apply more fertilizer to nourish the roots to ensure the normal growth of the eggplant root system, which can improve the disease resistance of the eggplant.

Pesticide control: foliar spraying of 1000 times of DuPont Quancheng, 600 times of liquid (1 two to 2 sprayers) or other copper preparations, pay attention to the dosage is not too large, or methyl tobuzina or Xinwansheng or Pinrun and other agents, or add Shibaogong or polyantimycin for foliar spraying, spraying once every 5 to 7 days, can effectively prevent and control such diseases.