Eggplant leaves have a lot of small white dots, is this also a disease?

Judging from the subject's description, it should be the more common powdery mildew of tomatoes, we can compare the subject's picture and the powdery mildew leaves, from the **, it can be seen that the similarity between the two is extremely high, both are small reflective white pink spots, which are still in the diffusion stage, if it is powdery mildew in the later stage, the whole leaf of the plant will be white, affecting photosynthesis, and finally turning brown and wilting.

Prevention and control measures. <>

1.Crop rotation: 3 to 4 years rotation with non-solanaceous crops in severely diseased areas, preferably with leguminous or gramineous crops.

2.Pastoral hygiene: After the tomato is harvested, it is necessary to completely remove the residues of diseased plants in the field and the weeds at the edge of the field, and plough the soil and disinfect it with alum.

3.Selection of disease-free seeds and seed treatment: Seeds are selected from disease-free plants. If the seeds carry bacteria, you can soak the seeds in 50 warm soup for 25 minutes, dry and set aside.

4.Spray protection: In the early stage of the disease, it can be sprayed for protection, sprayed once every 7 10 days, and sprayed 2 or 3 times continuously. Oxenone may be used. 15 grams of decaenoylmeliline or 70 mancozeb 800 times liquid for spray control.

The leaves of tomatoes have a layer of white stuff that, depending on what you provide, may be downy mildew. Spring is the peak season for downy mildew. If the greenhouse temperature is too high and the moisture is too heavy, it is easy to cause the incidence of downy mildew. **A few points to pay attention to in downy mildew!

First, control the temperature in the shed, and keep the temperature above 20° when the tomatoes first bloom, and pay attention to ventilation. The temperature should be controlled at 25 to 28 degrees Celsius during the peak fruit season, and the surface temperature should be 24 to 25 degrees Celsius. , pay attention to the appropriate time to release the air (after the surface temperature rises to a suitable temperature before release) humidity.

The relative humidity of the air is controlled at 45% to 55%, and the humidity temperature can be well controlled, which can prevent downy mildew.

Second, spray 400 500 times mancozeb every 10 to 15 days for prevention, and if you have downy mildew now, use DuPont Kelly once to get it. You can also use silver farry three times a day, once a day for foliar sprays. The effect is very good.

Due to the problem of uploading, I can't ****. Please look carefully**, I hope you will be cured as soon as possible and win a bumper harvest.

Theoretically, this is also a disease, but it is quite normal.

It should be eggplant powdery mildew, which is a disease caused by the infection of powdery mildew monofilaments and occurs on eggplants. Powdery mildew can occur in the whole growth period of eggplant, mainly harming leaves, mostly starting from the middle and lower leaves of the plant, and causing less harm to fruits and stems.

Eggplant powdery mildew is one of the common diseases of eggplant, and when the disease of eggplant is serious in warm and rainy weather, the front and back of the leaves are covered with powdery powder, resulting in low yield and poor quality of eggplant, which affects the economic income of growers. Powdery mildew occurs in all parts of China, and the degree of damage caused by cultivation in protected areas is heavier than that in open fields.

The control methods of eggplant powdery mildew are mainly agricultural control and chemical control. Firstly, excellent varieties were selected, and field management and fertilizer and water management were strengthened. Finally, it is combined with chemical agents for prevention and control.

It may be caused by drought, so it is good to sprinkle the leaves with cool water a few times.

It is best to have **, if it is also caused by hot dry wind, spray it twice with a suspension fertilizer series.

Yes, pests and diseases must be controlled. Eggplant has a strong growth momentum, many side branches, and leaves grow quickly, especially when the temperature is right and fertilizer is sufficient, the plant is more luxuriant. However, if the plant grows too densely, it will cause flower drop, rotten fruit, and poor fruit color.

Therefore, trimming the leaves of eggplant can increase the yield.

Leaves are the organs that make and accumulate nutrients, and in general, the more leaves there are, the more nutrients are produced and accumulated. However, if there are too many leaves, it will affect ventilation and light transmission, and the old leaves and diseased leaves not only have a weak ability to produce nutrients, but also cause harmful diseases, so repair a part of the healthy leaves, remove the old leaves, diseased leaves, is conducive to plant growth and fruiting, spraying a new high-lipid film, can automatically form a layer of invisible polymer protective film, optimize the quality of plant water absorption, ventilation and light transmission. Shielding the signal of pest and disease and weakening the transmission vector, resisting and defending against natural environmental disasters.

Leaf pruning should remove weak branches and side branches at the base, as well as old leaves and diseased leaves, and appropriately remove overly dense healthy leaves to keep the leaves sparse and even, so as to facilitate ventilation and light transmission. During the whole growth period of eggplant, prune the leaves 4-5 times, and at the same time cooperate with the amino acid foliar fertilizer of Ribery Yanwo to prevent the phenomenon of too many leaves pruning at one time and only a few leaflets on the top.

Eggplant leaves have a lot of small white dots, is this also a disease?

Hello, dear, it may be a small white spot caused by malnutrition, partial application of nitrogen fertilizer, causing the eggplant to grow, and the light is absolutely covered by the lush leaves (the eggplant leaves are already large), and the fruit will be greedy for green and late ripening, and the coloring and posture are poor; When there is a deficiency of trace elements such as calcium and boron, it can also cause poor fruit coloring. After eggplant enters the fruiting period, the demand for water and fertilizer is larger, and topdressing should be done while watering, compound fertilizer should be selected (note that the concentration should not be too high), with potassium fertilizer such as potassium fulvic acid, and topdressing 4-5 times during the general growth period.

There are a lot of white streaks on the leaves of the eggplant that may be due to the following reasons:

1.The white streaks on the leaves of eggplant may be due to parasite damage, **Here's how::

2.Spread the soil under the sun and expose it to death, so that the parasite eggs and germs in the soil will be sunburned.

3.After the soil is exposed to the sun, pull the tomato plant from the pot, cut off the wilted and rotten roots, apply plant ash or carbendazim powder to the wound, and place it in a cool and ventilated place to dry the wound.

4.Prepare moist soil and plant tomatoes in a pot and wait for the tomatoes to sprout.

If it is not made of parasites to rent the foundation beams, it may be caused by the lack of elements, and the solution is as follows:

1.The solution to nitrogen deficiency: dilute urea with water to a concentration of 1, spray once in tomato seedlings about 10 days apart, and spray twice in a row to alleviate it.

2.The solution to potassium deficiency: the potassium dihydrogen phosphate solution used should be sprayed once every 10 days between tomato seedlings, and it can be alleviated by spraying twice in a row.

The appearance of white streaks on tomato leaves is infected with tomato spot blight.

Spot blight mainly affects the leaves, stems and calyxes of tomatoes, especially on the leaves during the flowering and fruiting stage, and the fruit stalks and fruits are rarely damaged. Usually the old leaves near the ground are the first to become diseased, and then gradually spread to the upper leaves. At the beginning of the disease, the back of the leaf appears water-stained small round class, and soon there are round and nearly circular lesions on both sides of the leaf, the edge is dark brown, **gray-white, delayed depression, generally 2 3 mm in diameter, dense black and small colored spots (conidia).

Because the shape of the lesion is like a fish eye, it is called the fish eye spot disease. When the disease is severe, the leaves gradually wither and yellow, and the plants decay early, resulting in early defoliation. The lesions on the stem are oval, brown, and the lesions on the fruit are brown and rounded.

Yellow spots on eggplant leaves are diseased, mainly caused by bacterial infection. During the growth period, if the growth environment is not suitable or the maintenance method is improper, the eggplant will be easy to get sick after the growth deteriorates. After the eggplant gets sick, it needs to cut off the diseased leaves and burn them intensively, and then spray them for **, and strengthen the maintenance in the later stage, and spray them to do a good job of prevention.

Yellow spots on eggplant leaves are a disease.

Eggplant is a common crop plant that can be attacked by pathogens during the growth period if it is not properly maintained or the environment is not suitable. When eggplant gets anthracnose, yellow lesions will appear on the leaves, which will dry out or wilt in the later stage. If the eggplant has anthrax, the diseased leaves need to be cut off and burned in time to cut off the source of infection.

After pruning the diseased leaves, the eggplant can be sprayed with carbendazim, chlorothalonil or Bordeaux liquid to remove the disease. The agent can be sprayed once in 7 to 10 days, and it is not recommended to stop using it halfway, otherwise it will reduce the efficacy of the drug for the first time. After spraying, the eggplant can be moved to a cool and ventilated environment for maintenance, and after spraying 3 or 4 times in a row, the disease can be suppressed.

Yellow spots on the leaves of eggplants may also be brown spots, and the leaves will have brown spots with yellow halos at the beginning. In the later stage, the lesions will expand, the color will turn yellow, and the leaves will dry up and wither. If the eggplant has brown spot disease, it is also necessary to cut off the diseased branches and leaves of the eggplant, and after pruning, the leaves need to be burned to avoid the spread of the disease.

After pruning the diseased leaves, the eggplant can be sprayed with chemicals such as methyl tobuzin or carbendazim. Dilute the agent according to the instructions, and the concentration should not be too high, otherwise the eggplant will be harmed. After dilution, you can use it to spray the stems, leaves, and soil of the eggplant, generally about 7 days to spray 1 time, about 3 times after spraying, can relieve the condition.

Eggplant black blight.

1. Symptoms Eggplant leaves, stems, and fruits can all be susceptible. Leaves infected with the initial purple-black round dots, enlarged in diameter o 5-1 cm, round or irregularly shaped spots, purplish-black around the periphery, lighter inside, sometimes forming a whorl, causing early defoliation. In particular, protected areas are the most occurring.

2. The pathogen is Corynespora melongnae takimoto, which is a fungus of the subphylum Hemimycetes. The conidia are slender, the conidia are solitary or clustered on the conidia on the stem, the rod hammer-shaped, pale at first, then dark purple-black, with L-L 6 septa.

3. Route of infection.

Mycelium or conidia overwinter on the stems, leaves, fruits or seeds of the host and become the source of infection at the beginning of the following year. This bacterium can develop in 6-30, and the onset temperature is 20-25.

Fourth, prevention and control methods.

1. Strengthen field management, pay attention to the wind in the Miao bed, avoid excessive irrigation in the field, and pay attention to drainage and humidity reduction in the rainy season;

2. At the beginning of the disease, spray 500 times of 50 thiophanate-methyl wettable powder, 6000 times of 50 carbendazim wettable powder, 500 times of 50 mixed glutinate suspension or 50 500 times of 50 diphylfacim wettable powder, once every 7-10 days, and 2-3 times of continuous prevention and control.

Hello, it should be the yellow particles of the insect bite. If it doesn't affect the result, you don't have to deal with it, that eggplant.

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.