What medicine to use for cucumber vine blight, and what medicine to use to prevent and control cucum

Vine blight is mainly manifested on the stems and leaves, the stems and vines have white-brown stripes on the diseased parts, longitudinal cracks in severe cases, red viscous flows out when the humidity is high, and the xylem in the stem is rotten and gradually becomes filamentous. Vine blight occurs on the leaves, and the initial lesions are round or irregular greenish spots, which gradually turn black or brown, and the main characteristics are three: first, the leaf spots are larger; second, there are wheel stripes and small black spots on the leaf spots; Third, the air humidity is small, easy to crack and perforate.

Vine blight is a soil-borne disease, mainly spread by watering and air flow, melon crops mostly occur in late autumn or early spring, because the suitable temperature for the spread of the fungus is 18-25, and the relative humidity reaches more than 85% when it is easy to get sick, that is, moderate temperature, high temperature, and rainy are favorable environmental conditions for the disease.

The early prevention of vine blight should be based on agronomic measures, mainly to clean the countryside and remove the diseased residues in a timely manner. strengthen fertilizer and water management and cultivate robust plants; Regulate temperature and humidity, timely ventilation and moisture removal; Seed disinfection, shed disinfection and soil disinfection before planting; In the middle and late stages of management, special attention should be paid to the diseased residual leaves in time, and the stems and vines are prone to water infection with vine blight when watering, so special attention should be paid to the spraying prevention and control after watering.

The chemical control method of vine blight should be based on early prevention, and amicida 1500 times or Dacrine 600 times can be sprayed 1-2 times before the onset of the disease. At the onset of the disease, you can use 1500 times of Ami Miaoshu spray**, once every 5 days, and 2 times in a row. You can also use Shigao 1000 times mixed with Daknin 500 times spray, such as adding 3000 times of streptomycin sulfate, the effect will be better.

It is recommended that the pesticide of traditional Chinese medicine is safe, and 150-250ml spray of R. solanacearum is used once a day for 2-3 times.

Cucumber vine blight can generally be sprayed with 70% mancozeb wettable powder and 80% chlorothalonil wettable powder mixed into 300-400 times liquid according to the ratio of 1:1, or 30% methyl amthalcofen (600 times liquid % chloroxystrobin (800 times liquid) and other drugs can be sprayed, which can generally effectively prevent and control vine blight.

The bacterium belongs to the subphylum Ascomycetes. Spray with 600 times of 75% chlorothalonil wettable powder, or 500 times of 70% mancozeb wettable powder. cucumbers 10,000 shares, and you can choose chlorothalonil to disinfect and sterilize.

Cucumber vine blight can be sprayed with 600 times of 75% Baiqing Tangong Bacteria Qingxin Moisture Caution Yuzheng Powder. Cucumber vine blight can choose chlorothalonil powder to disinfect and sterilize. (The above content is a personal opinion and is for reference only).

Cucumber vine blight can be damaged ——— above-ground parts such as leaves, stems, melon strips and tendrils, mainly affecting leaves and stems. Leaf infection, mostly from the leaf edge of the disease, the formation of yellow-brown to brown "V" shaped lesions, dense on the small black spots, easy to break after drying. Stem and vine infection, mainly in the stem base and stem nodes and other parts, initially produce oil-soaked small lesions, gradually expand and often around the stem and vine for half a week to a week, longitudinal can be as long as more than ten centimeters, the disease part is dense with small black spots, and the later lesions become yellow-brown.

When the humidity in the field is high, amber gum often flows out of the diseased part, which is longitudinally cracked after drying, causing the stems and leaves above the diseased part to wither. The epidermis of the stem is easy to tear after the disease, causing the death of the seedlings, but the vascular bundle does not change color and does not harm the roots, which can be distinguished from the wilt.

Prevention and control measures. 1) Plots with severe disease need to be rotated for 1-2 years.

2) Seeds can be sterilized, and the seeds can be soaked in 55 warm water for 15 minutes. Direct seeding seeds can be mixed with 50 seeds of the weight of Fumei double wettable powder.

3) Adopt formula fertilization technology, apply sufficient fully decomposed organic fertilizer, and increase phosphorus and potassium fertilizer. Reasonable irrigation and timely drainage after rain.

4) In the early stage of the disease, timely drug prevention and treatment can be carried out, and the whole plant can be sprayed with 1250 times of 28 easy spot net wettable powder, or 2000 times of 50 Shibaogong wettable powder, or 800-1000 times of 70 methyl tobuzin wettable powder, or 500-600 times of 50 carbendazim wettable powder, and the whole plant can be sprayed 2-3 times continuously.

Summary. Hello dear. Cucumber vine blight is also known as black rot.

It occurs in all places, infects leaves, stems and fruits, and is a common disease in the production of cucumber and fruit-type cucumber. The lesions on the leaves are nearly round, some are V-shaped from the leaf margin inward, light brown to yellowish-brown, the lesions are easily broken in the later stage, the wheel lines of the lesions are not obvious, and there are many black dots on the upper side, that is, the conidia of the pathogenic bacteria, the diameter of the lesions on the leaves is 10 35 mm, and a few are larger; The lesions on the vine are oval to fusiform, white, sometimes overflowing with amber resin gelatin, and the diseased stems shrink in the later stage, and the longitudinal cracks are chaotic, which leads to rot vines in severe cases.

Hello dear. Cucumber vine blight is also known as black rot. It occurs in all places, infects leaves, stems and fruits, and is a common disease in the production of cucumber and fruit-type cucumber.

The lesions on the leaves are nearly round, some are V-shaped from the leaf margin inward, light brown to yellowish-brown, the lesions are easily broken in the later stage, the wheel lines of the lesions are not obvious, and there are many black dots on the upper side, that is, the conidia of the pathogenic bacteria, the diameter of the lesions on the leaves is 10 35 mm, and a few are larger; The lesions on the vine are oval to fusiform, white, sometimes overflowing with amber resin gelatin, and the diseased stems shrink in the later stage, and the longitudinal cracks are chaotic, which leads to rot vines in severe cases.

Prevention and control methods: (1) agricultural control. Implement a 2-3 year crop rotation.

Select seeds from disease-free plants, remove diseased plants in time, and bury them deeply or burn them. Formula fertilization technology is adopted, and enzyme bacteria are applied to make compost or decomposed organic fertilizer. Choose disease-resistant varieties such as Wanqing, Chunyan, etc.

2) Sterilize the seeds. Soak seeds in 55 warm water for 15 minutes or 100 times 40% formaldehyde for 30 minutes, then wash and sow with water. (3) In the early stage of the disease, spraying 25% prochloraz EC 1000 times liquid has significant control effect, in addition, 40% flusilazole emulsifiable concentrate 4000 times liquid or 75% chlorothalonil wettable powder 600 times liquid, 78% wave?

500 600 times of manganese-zinc wettable powder, 1500 times of 50% prochlorazaz manganese salt emulsifiable concentrate, 1000 times of 25% azoxystrobin suspension, 1000 times of fludioxonil suspension, 20% propylthiocarbendazim suspension 2000 times, master the whole field medication in the early stage of the disease, and then prevent and treat it once after 3 or 4 days, and then decide whether to use it according to the change of the condition. It can also be used to apply 50 100 times of the above-mentioned fungicide to the sick area. (4) 45% chlorothalonil fog agent is used in the shed protection area, 25 40 grams of medicine per 100 meters3, divided into 5 6 points, lit from the inside out, smoked for 1 night, once every 6 days, and smoked 2 3 times in a row.

The control of cucumber vine blight can also be used 3BC-660 type greenhouse disease ozone control device, ozone concentration is controlled within milligram kilograms, treatment within 20 minutes, prevention and control of cucumber downy mildew control effect of 90% 100%. This method is very effective, but the concentration and action time must be strictly controlled, otherwise it will cause the whole shed to destroy the seedlings. The use of chlorothalonil should be stopped 10 days before harvesting.

Rice bacterial stripe disease, referred to as thin stripe disease, is a disease that seriously threatens rice production. It was first found in the Philippines, in 1955 China first found the disease in Guangdong, in the early 60s of the 20th century, it was basically controlled, but after the 80s, it resurfaced and spread rapidly to the rice areas of Central China, Southwest China and East China. The yield of diseased fields is generally reduced by 10% to 20%, and the severe yield reduction can reach 40% to 60%.

Prevention and control methods. 1) Chemical control seed treatmentSoak the seeds with 1% lime water, soak them in 25 for 3 days at a temperature of 25, soak them for 3 4 days at 15 20 times, the water layer is about 15 cm higher than the seeds, and cover them after soaking without stirringSoak the seeds with hydrochloric acid dilution for 3 days, rinse and sow seeds

Soak and disinfect with 300 times of 85% strong chlorine wettable powder, wash and induce germination. Field controlIn the early stage of the disease, spray with 50 grams of strong chlorine mixed with 30 kg of water every 667 m2

During the onset period, spray with 15 grams of potassium permanganate plus 500 grams of salt, or 100 milliliters of xiaozhiling, mixed with 30 kg of water, every 667 m2Seedlings at the three-leaf stage and before transplanting with 20% leaf green double wettable powder 600 times liquid or 10% dry net wettable powder 300 400 times solution, each sprayed once, and sprayed again once after 7 days of field tillering. When spraying, avoid wind, rain and other bad weather as much as possible, and try to make the leaves evenly medicated.

2) Agricultural prevention and control of shallow water frequent irrigation, moderate drying, and strict drying at the end of tillering.

(1) Seed treatment.

Soak seeds in 55 warm water for 20 30 minutes, remove and dry before germination and sowing; It can also be used for seed dressing with 50% of the seed weight of promethine (iprodione) wettable powder.

2) Cultivation measures.

2 to 3 years rotation with non-melon crops, completely remove the litter and leaves and residues of melon crops after seedling pulling, and use high furrow mulch film cultivation; Apply enough fully decomposed organic fertilizer, appropriately increase phosphorus and potassium fertilizer, and avoid flood irrigation and field waterlogging; After the onset of the disease, remove the diseased leaves and vines in time, knock off some excess leaves and vines, and properly control the watering, and pay attention to ventilation and moisture drainage in the protective area.

3) Pharmaceutical prevention and control.

In the early stage of the disease, spray the right agent, focusing on spraying the middle and lower parts of the plant, 7 10 days for prevention and control, 2 3 times according to the condition. The vine blight fungus is easy to invade from the wound and fissure wound caused by the whole vine, and the wound and vine should be sprayed in time after the whole vine. When the disease is severe, the diseased stem can be smeared with a liquid solution that doubles the spray, focusing on the flowing glue to promote wound healing.

(1) Symptoms and pathogenesis.

Cucumber vine blight mainly affects stems and leaves. The leaves are damaged, and the lesions are mostly V-shaped or semicircular along the edge of the leaves, sometimes nearly round, and the lesions are yellow-brown to brown, with many small black spots scattered on them. The stems and vines are oval or diamond-shaped, oily, grayish-white, and slightly concave.

When wet, it can secrete a sulphur-colored colloidal mucus, reddish-brown when dry, the diseased part is dry and longitudinally cracked, and many small black spots are scattered on the surface, and the stems and vines rot and die when they are serious.

Cranberry blight is caused by fungal infestation of the subphylum Ascomycetes, the melon globulus genus. Pathogen spores are spread by wind and rain, irrigation water, and field operations. Invasion from a wound or stomata.

The suitable temperature for the onset of the disease is 18 25 and the relative humidity is 85%. Disease is susceptible when soil moisture is high, planting density is high, and plants are weak.

2) Prevention and control methods.

The comprehensive control method for the control of cucumber vine blight is the same as that for cucumber downy mildew.

In terms of chemical control, within 5 10 days after colonization, 300 times of 70% manganese zinc solution of methamalafen, or 200 times of mancozeb, 300 times of 75% chlorothalonil, 400 times of 72 DuPont Kelu, 70% of methyl tobuzin 300 times of liquid and other agents can be mixed with 3000 times of organosilicon solution, and 10 15 cm of the base of the stem should be carefully coated.

7 1 time for 10 days, 2 3 times in a row. It should be noted that when spraying, the base of the stem and vine and the surface of the ground should be carefully sprayed to control the occurrence of this disease.

The leaf lesions are light brown and nearly round at first, and gradually expand into irregular or V-shaped, and the diseased leaves are dry. The lesions on the stems, petioles, and roots are water-soaked gray-green elongated strips, cracked and secreted orange-red gum juice, and dense black dots in the later stage. Vascular bundles do not change color.

The lesions on the skin of the fruit are water-soaked, ** brown wilted spots, and have concentric ring patterns and small black spots.

Prevention and control points: seed disinfection; Reasonable pruning, timely drainage, create a dry and ventilated environment; In the early stage of the disease, choose carbendazim and bad cream? Manganese-zinc, thiophanate-methyl, mancozeb, iprodione and other agents can also be used to compound powder (thiophanate-methyl cream?).

Manganese zinc Agricultural streptomycin 1 1 1) Add water to make a paste and apply it to the stems of diseased plants.

For prevention and control, it is recommended that you use phenyl ether * etherstrobin, which has a special effect on vine blight belonging to the class of semi-known bacteria