What medicine is good for eggplant cotton blight, eggplant cotton blight is very common, what are th

The prevention and control of eggplant cotton blight mainly takes the following measures:

First, choose disease-resistant varieties.

Second, agricultural prevention and control.

Crop rotation with non-Solanaceae and Cucurbitaceae crops for more than 2 years. Adopt high ridge mulching to prevent water accumulation, increase phosphorus and potassium fertilizer, and remove diseased fruits and leaves in time.

Third, pharmaceutical prevention and control.

At the beginning of the disease, spray 500 times of 70% ethylphosphine aluminum manganese zinc wettable powder, 500 times of 58% methalene-mancozeb wettable powder, 500 times of 64% oxafen mancozeb wettable powder, 800 times of 25% methamethyl wettable powder and 800 times of 50% Fumei double wettable powder, 500 times of 72% frosturea cyanide mancozeb wettable powder, 500 times of downy mildew carb propionamide aqueous solution or 800 times of thiophanate-methyl wettable powder. Generally, spray once every 7 days or so, and spray 2 or 3 times in a row.

Cotton blight is also known as "rotten eggplant" and "white hair".

Symptoms Both seedlings and adults can be damaged, mainly to the fruit. The seedlings are infected, the young stems are water-stained and shrunk, the seedlings are cataplexed, the adult leaves are damaged, they are nearly round or irregularly shaped, dark green to light brown water-stained lesions, there are obvious wheel lines, when wet, the lesions expand rapidly, the edges are not clear, and there are sparse white molds on the spots. When dry, the diseased leaves dry up and crack.

The young stem is infected, and the diseased part turns brown and shrinks, causing the upper leaves to wilt and dry up. The fruit is infected, mostly starting from the old ripe fruit in the lower part, first the diseased part is a small round spot in the form of water stains, and then gradually expands and slightly concave, showing a large yellow-brown or dark brown spot, and finally spreads to the whole fruit. The fruit shrinks and becomes soft, and when wet, it is densely covered with white hairy hyphae (mold layer), and the fruit becomes black and rotten.

Pathogen and pathogenesis Eggplant cotton blight is caused by the fungus infection of the Phytophthora spp. The pathogen overwinters in the soil with the oospores and the diseased residues. When the conditions are suitable, the pathogens can directly invade the stems and roots of seedlings to cause disease.

Oospores are spread by wind and rain, directly invaded by the epidermis, and the temperature range of the development of the pathogen is 8 38, the suitable temperature is 20 30, and the relative humidity is more than 80%. High temperature, heavy rainfall, low-lying terrain, poor drainage, excessive use of nitrogen fertilizer, continuous cropping, etc. will aggravate the disease.

The prevention and control methods are the same as those of integrated prevention and control. The main drugs used for chemical control are as follows:

1:1: 200 times Bordeaux liquid, 23% copper 400 times liquid, copper noble 500 times liquid, 70% mancozeb 500 times liquid, 70% ethyl phosphorus aluminum manganese zinc 500 times liquid, 30 days of 1000 times of dioxalin solution, 70% methyl manganese zinc 500 times liquid, 72% Kelu 700 times liquid; Prik 700 times liquid, 75% chlorothalonil wettable powder 700 times liquid, trico 600 times liquid, 64% alum 500 times liquid, 77% can kill 500 times liquid.

The above liquid medicine is sprayed once every 8 10 days, and sprayed 3 or 4 times in a row. In case of rainy days, you can switch to 5% chlorothalonil dust agent, 500 grams of powder spraying per meter 2 greenhouse or 25% 40% chlorothalonil fog agent, 2 per meter, 150 200 grams of smoke control in greenhouse, once every 5 7 days, 2 3 times in a row.

Prevention and control methods: Implement the rotation of non-nightshade vegetables for more than 4 years, and choose high and dry land. Disease-resistant varieties were selected, and round eggplant was more disease-resistant than long eggplant.

Take high furrow mulching, or use straw and wheat straw to remove old leaves, diseased fruits and diseased leaves in time. Strengthen drainage after rain, properly control watering after the onset of the disease, and reduce soil moisture. The focus of pesticide prevention and control is before rain and at the beginning of the disease.

The agent can be used 600 times of 75% chlorothalonil wettable powder, or 500 times of 50% copper methyl wettable powder, 58% methyl frost powder? Manganese-zinc wettable powder 500 times liquid, 72% frost urea? 600 times of manganese zinc, 200 times of 40% aluminum triethylphosphonate (aluminum ethylphosphon) wettable powder, 800 times of Pulik water solution, etc., once every 5 7 days, 3 times of continuous control.

Eggplant cotton blight mainly harms the fruit, that is, the eggplant itself, but in the actual infection process, not only the fruit, but also the leaves, stems, and flowers of the eggplant will also be damaged. If the fruit is infected, the fruit near the ground will be affected first, and the affected fruit will appear as a water-soaked slightly concave round spot, which can then expand to the whole fruit.

The main manifestations of adult disease are: irregular lesions on the leaves, obvious ring lines, inconspicuous edges, brown and purple, and white mold growing on the lesions in a humid environment. This is consistent with the spread of the fungus through soil and leaf litter, as well as through water droplets.

At the same time, the plant grows too vigorously, the internal tissue is delicate, and the nitrogen fertilizer is applied too much, which is also conducive to the infection of cotton blight. Eggplant has cotton blight, the most direct is to cause a large amount of eggplant to rot, everyone also called "rotten eggplant" disease. It will reduce the yield of eggplant by 30%-50%.

Therefore, eggplant cotton blight must be paid attention to by vegetable farmers.

Eggplant cotton blight occurs to varying degrees in the process of eggplant cultivation, especially in the shed off-season cultivation occurs more seriously, the disease will cause fruit rot, when the summer shed film is removed in continuous rainy weather, it is easy to occur on a large scale, the open field eggplant belongs to the main vegetable cultivation category, and in the fruiting period of eggplant, just in time for the high temperature and rainy season, this high temperature and high humidity climate conditions are the conditions for the flourishing of eggplant cotton blight, causing serious eggplant rot in summer, once the cotton blight occurs.

Eggplant cotton blight, farmers who have planted eggplant know that this disease will harm the eggplant fruit and cause the fruit to rot, but many people do not know that eggplant cotton blight will not only harm the fruit, but also harm the stems and leaves of the eggplant plant. Planting disease-resistant or disease-tolerant varieties is one of the important measures to prevent the occurrence and epidemic of eggplant cotton blight. There were obvious differences in disease resistance among eggplant varieties, and the round eggplant species were generally more resistant than the long eggplant species, and the thick-skinned species were generally more resistant than the thin-skinned species.

There are some small spots on the eggplant, and there are white cotton wool fungus, and the diseased fruit is very easy to fall, and it may be that the whole fruit is rotten, and there is white mold on it.

There will be some small spots on the surface of the eggplant, and there will be white cotton wool, the eggplant fruit is very easy to fall, the eggplant is also very easy to rot, and the eggplant seedlings will die in severe cases.

That is, there will be a large number of spots on the leaves, and the leaves will fall and turn yellow, and the fruiting rate is particularly low.

At the seedling stage, the disease occurs at the base of the stem, which develops rapidly, often causing cataplexy and causing the seedling to die. The leaves of the adult plant stage are susceptible to disease, producing water-soaked irregular lesions, with obvious ring patterns, but the edges are not obvious, brown or purple-brown, and a small amount of white mold grows on the lesions when wet. The stems are water-soaked and shrunken, sometimes broken, and have white mold.

After the flowers are infected, they are brown and rotten. The fruit is the most damaged, beginning to appear water-soaked round spots, the edges are indistinct, slightly sunken, yellowish-brown to black-brown. The flesh of the diseased part is black-brown and rotten, and there are white flocculent hyphae on the surface of the diseased part under high humidity conditions, and the diseased fruit is easy to fall off or shrink into a stiff fruit.

Blight is one of the more common diseases in eggplant cultivation, which can cause a large number of eggplant to rot, so eggplant disease is also known as rotten eggplant, which has a great impact on the quality, yield and economic benefits of eggplant. Eggplant blight has a wide range of occurrences, and if the incidence is normal, the yield will be reduced by about 30%, and the severity of the disease will be reduced by 50%. Climatic factors.

Every year from May to July, if it rains for more than 65 days, the temperature is 28-30, and the relative humidity exceeds 80%, the weather will be sunny after the rain.

Under the conditions of high temperature and humidity, it is very conducive to the growth, reproduction, spread and spread of pathogenic bacteria, which is a more important and direct cause of pathogenesis. After vegetable planting, due to the lack of arable land and more continuous cropping, vegetable farmers have the habit of continuous cropping. The disinfection of vegetable fields is not good, and a large number of bacteria have accumulated, which provides basic conditions for the occurrence of diseases.

Most of the diseased fruits begin to ripen near the ground, and the diseased fruit part begins to appear with small dots of water, and then gradually expands, slightly dented, and appears large yellow-brown or dark brown spots, and finally spreads to the whole fruit.

When the humidity is high, the inside of the fruit turns black, rots, and falls off easily. When the diseased fruit falls to the ground, the whole fruit rots and is covered with white mold due to moisture, and finally shrinks into a stiff fruit. Spraying 25% azoxystrobin EC 2000 times had a good effect.

1 to 1 to 200 times Bordeaux solution, 23% copper complex 400 times solution, precious copper 500 times solution, 70% mancozeb 500 times solution, 70% aluminum phosphide manganese zinc 500 times solution, 30% formecil 1000 times solution, 70% methyl manganese zinc 500 times solution, 72% Coru 700 times solution; chlorothalonil 700 times, 75% chlorothalonil wettable powder 700 times, trek 600 times, 64% anti-virus alum 500 times, 77% killable 500 times.

These solutions are sprayed 3-4 times every 8-10 days. On rainy days, 5% chlorothalonil dust agent, 500 grams per square meter of greenhouse or 25%-40% chlorothalonil fog agent, 150-200 grams per square meter of greenhouse, 1 time every 5-7 days, a total of 2-3 times. Eating eggplant regularly is very helpful for the improvement and repair of the body, because eggplant is rich in vitamin P, which can protect the cardiovascular system, prevent cancer and anti-aging, and also prevent bleeding and anti-aging.

**The special drugs for eggplant cotton blight are, flumorpholine, methalen, cyanofrostazole, Baitai, etc., the efficacy of these drugs is particularly powerful, so we must pay attention to it in the spraying process.

Flumorpholine, methamethalin, cyanofrostazole, Baitai, etc., these are all drugs that we use to ** some diseases and insects, but they cannot be used at will, which is easy to cause harm.

Eggplant cotton blight, the leaves produce water-soaked irregular lesions, slightly whorled, the edges are not obvious, but when dry, the junction between the sick and healthy is obvious, the lesions are brown or purple-brown, and a small amount of white mold grows on the lesions when wet. The fruit is the most damaged, at first it is a water-soaked round spot, the edge line is not obvious, slightly concave, yellow-brown to black-brown, and the flesh of the diseased part is black-brown and rotten. Under high humidity conditions, there are white flocculent hyphae on the surface of the diseased part, and the diseased fruit is easy to fall off or shriveled down into a stiff fruit, commonly known as falling eggs and rotting water.

It can be sprayed with manganese zinc frost urea, aluminum enoyl phosphate, manganese zinc flumarin, manganese zinc frost, etc., sprayed 2-3 times at an interval of 5-7 days.

Cotton blight is also known as rot disease.

Symptoms of stem damage, at the beginning of the stem base of eggplant, the affected part is soaked in water, and then with the aggravation of the disease, the stem base of the eggplant will gradually turn black and rot, when the diseased part is cut with a knife, the vascular bundle of the diseased part can be found to be discolored; When the air humidity in the shed is high, it will also produce a white dense mold layer in the diseased area, and can cause the plant to wilt and die. The stems infected by cotton blight generally appear wet and rotten, brown in color, and the cortex is easily peeled off.

Prevention and control, eggplant cotton blight can be used alternately with flumorpholine, methamethal, cyanofrostazole (Koga), Baitai and other agents, spray prevention and control.

Due to the production process, content, and hidden ingredients of pesticide companies, please go to the local distributor to seek the ideal insecticide and better solution according to the condition.

Cotton blight occurred in nightshade vegetables, and eggplant and tomato were the most serious.

Eggplant damage symptoms: cotton blight is mainly harmful to fruits (commonly known as rotten eggplant) on eggplant, and sometimes stems and leaves can also occur. The disease can occur throughout the entire period of fruit development, but it is mostly infected with old and ripe fruits.

The fruit is often damaged by petal adhesions on the pedicle, and also in the middle and end of the fruit. Generally, the fruit near the ground is the first to develop. At the beginning of the disease, the diseased fruit forms water-stained lesions, which expand to form sunken yellow-brown to dark brown spots, and finally extend to the whole fruit and rot.

When the humidity is high, dense white mycelium will be formed on the diseased fruit, and untidy near-circular water-soaked spots will be formed when the leaves are damaged. When the humidity is high, the lesion develops quickly, the edge is not clear, there are obvious ring patterns on it, and the young stem becomes brown and rotten after the stem is invaded, until the stem shrinks and withers and dies, and the diseased part produces white mold when wet.

Tomato damage symptoms: cotton blight mainly affects green fruits, also known as brown spoilage. It mostly starts from the vicinity of the fruit pedicle or the shoulder of the fruit, and the light brown spot appears at first, and then turns brown, and white mold grows in high humidity, and the diseased fruit does not soften or deform, and is easy to fall off.

The pathogen of the disease is a kind of Phytophthora oomycetes, which overwinters in the diseased tissues in the soil, and the oosporangia, sporangia or zoospores produced by them are transmitted by wind, rain and running water in the following year. The temperature range of pathogenic bacteria development was 8 38, and 28 30 was the most suitable. The hyphae are well developed when the relative humidity of the air is above 95%, and the sporangia are well formed when the air is about 85%. The terrain is low-lying, the drainage is not smooth, the plant is too dense are prone to this disease, in Jiangsu and Zhejiang, the eggplant generally occurs in May, the tomato is in June, in case of high temperature and rainy weather, hot and humid, the disease can occur seriously.

The prevention and control methods of eggplant cotton blight are:

1) Implement crop rotation with a cycle of 3 to 4 years.

2) Breeding disease-resistant varieties.

3) Choose a plot with high terrain and smooth drainage for planting, reasonable dense planting, proper pruning, and timely removal of old leaves to increase field ventilation and light transmission.

4) Mulch film is used to reduce the chance of oospores splashing onto the fruit.

5) Spraying prevention and control. To prevent the onset of the disease, 58% methalene-zinc wettable powder 500 times liquid, 64% alum wettable powder 500 times liquid, 77% killable wettable powder 500 times liquid, 60% succinate aluminum (DTM) wettable powder 500 times liquid, 50% methyl copper wettable powder 600 times liquid and other sprays. Prevention and treatment once every 7 days, 3 times in a row.