What medicines are used to prevent cucumber pests and diseases, what pests and diseases are cucumber

Cucumber diseases include downy mildew, powdery mildew, bacterial horn spot and vine blight.

Downy mildew prevention and control method: Before the onset of the disease, 600 times of 75% chlorothalonil wettable powder and 1000 times of 77% killable wettable powder were used for alternate prevention. In the early stage of the disease, 600 times of 58% methalene-manganese-zinc wettable powder, 800 times of 47% Garinon wettable powder, and 800 times of Puke-soluble liquid were used for timely prevention and treatment, once every 7 days, 2 3 times in a row.

Powdery mildew prevention and control methods: 15% powder rust rather wettable powder 1500 times liquid, Xiansheng wettable powder 600 times liquid, 10% Shigao water dispersible granules 1000 1500 times liquid alternate prevention and control, every 7 10 days 1 time, 2 3 times in a row.

Prevention and control methods of bacterial keratoplakia: 72% agricultural streptomycin 3000 4000 times liquid, 77% killable wettable powder 600 700 times liquid, 20% thiobenone 500 600 times liquid alternate prevention and control, 1 time every 7 days, 3 4 times in a row.

Vine blight control method: 600 800 times of 70% methyl tobuzin wettable powder was used in the early stage of the disease. 600 times of 75% chlorothalonil wettable powder and 500 times of 70% mancozeb wettable powder, alternately controlled, 1 time every 5 7 days, 3 4 times in a row.

It can also be mixed into a paste with 50% methyl tobuzin and alum, and applied to the diseased part with a brush, and the effect is good.

After cucumber pesticide damage, growth regulators such as brassinin or Bihu can be sprayed to alleviate the pesticide damage, and at the same time, water and fertilizer can be replenished to promote the recovery of plant growth. When spraying the regulator, you can add some potassium dihydrogen phosphate, urea including some medium and trace elements, and supplement nutrients after resuming growth.

1. After the cucumber is damaged and the growth is slowed down, you can use 30-50 mg of gibberellin per kilogram, and then dilute 100 per bucket of water (15-20 kg) with 150-200 grams of sugar, and spray the plant. If there is severe inhibition of growth, smear the growth point with gibberellin stock solution.

2. If the affected plants are relatively slight, they can be eliminated by strengthening fertilizer and water management, and they can be appropriately supplemented with fast-acting nitrogen fertilizer, or sprayed with a large amount of water in time to promote the normal growth of the plants; If the leaves or plants are seriously damaged, timely irrigation, phosphorus and potassium fertilizers, and tillage should be used to promote root development and enhance recovery ability.

3. If the pesticide damage caused by herbicides is slight, it can be sprayed with Bihu or Brassinolide, and watered and irrigated at the same time to restore plant growth.

4. If the leaves are rapidly curled and dry, 100 times of white sugar water should be sprayed in time, which can generally quickly relieve the pesticide damage.

5. For other pesticide hazards, it is generally recommended to use Bihu, Brassinolide, or anti-disease, etc.

Answer: Cucumber should be treated in time after being damaged by herbicides, if the degree of pesticide damage is low at the beginning, you can quickly spray the leaves of the damaged crop with a large amount of water, and you can mix an appropriate amount of baking soda solution or lime water in the water. Rapid application of fast-acting fertilizers such as urea is then followed to increase nutrients and promote recovery. After that, it is appropriate to spray drugs that alleviate the damage, such as drugs containing brassinin, indoleacetic acid, sodium dinitrophenol, chlorpyramide and other ingredients.

Speaking of cucumbers, as long as there is a small yard at home, there will definitely be its stock, after all, nutritious, crisp taste of vegetables who does not love it, but for novices how to prevent and control cucumber pesticide has become one of the most frequently asked topics, I will take a look with you to see how to solve the cucumber pesticide pesticide.

First of all, it is necessary to strictly follow the concentration and dosage instructions of pesticides, and the preparation of pesticides should be scientific and reasonable. Clean water should be used for dispensing. If it is hard water, it must be softened beforehand. When spraying, it is necessary to pay attention, be even, and considerate to avoid overdose of topical medication.

Secondly, it cannot be used when cucumber resistance is weak. Generally, the resistance at the seedling stage and flowering stage is weak, and the drug should be used cautiously; At noon in high temperature and drought, due to sufficient sunshine, cucumber leaves transpiration is faster, pesticide resistance is weakened, and pesticide activity is enhanced, so the spraying time should avoid the time when the sun is strong at noon.

If pesticides are sprayed by mistake, they should be rinsed with water 2-3 times in time. Remedial measures should be taken in time for cucumbers that have been chemically damaged. When the damage of seedlings and seedlings is light, the loose soil should be ploughed in time, and nitrogen fertilizer should be applied in time to promote the growth and development of seedlings. When the damage is severe, timely irrigation, increased application of phosphorus and potassium fertilizers, and ploughing and loosening soil can promote root development and improve its recovery ability.

At the same time, spray foliar fertilizers such as reed buds and plant life sources 1 2 times.

Cucumber leaves are the most seriously damaged, often manifested as wilting, yellowing, yellowish-white, accompanied by various color spots, edge scorching, tissue perforation, shrinkage and curling, thickening and stiffness, and early shedding. Therefore, effective prevention and control measures must be taken.

1. Downy mildew: spray with carbendazim to strengthen ventilation and control water volume. 2. Powdery mildew:

Use Nuo granules to apply every 7 days. 3. Spotted submarine: use a yellow plate to trap and kill adults, or spray spotted submersible agent.

4. Aphids: cut off all the infected branches and leaves, and then spray an oxidized dimethoate solution.

1. Downy mildew

Downy mildew mainly harms the stems and leaves of cucumbers, mostly occurs in low-lying terrain, poor ventilation, excessive watering, in the early stage of the disease, there are water-stained polygonal lesions, and the back grows a black mold layer, at this time, carbendazim should be sprayed, and when the cucumbers are cultivated in the later stage, strengthen ventilation and control the amount of water.

2. Powdery mildew:

After cucumber infection with powdery mildew, white nearly round small pink spots appear on both sides of the leaves, and the white mildew spots turn gray due to the old and mature mycelium in the later stage of the disease, which can be sprayed with Nuo granules with abundant water, applied once every 5-7 days, and organic fertilizer should be applied to cucumber every 1 month to improve disease resistance.

3. Spotted submarine fly

After the cucumber is infested by the spotted submarine fly, you can use the yellow plate to trap the adult insects, or spray the agent, use 20% spotted submersible net, the dosage per mu is about 24 grams, and then dilute it with 45 kg of water for spraying, and spray the cucumber every 7 days.

4. Aphids

After the cucumber is infected with aphids, all the stems and leaves with insect eggs should be cut off, and then stacked together for incineration to avoid the spread of pests, and then the cucumber should be sprayed with diluted dimethoate solution to kill all the pests.

Cucumbers picked are not suitable for spraying.

Cucumber cultivation techniques

Site preparation. 5 cubic meters of organic fertilizer for land preparation and fertilization, 25 to 30 kg of superphosphate or 10 to 15 kg of diammonium phosphate (5 kg of superphosphate per cubic meter, 2 to 3 kg of diammonium phosphate per cubic meter). Before planting, plough the furrow, the width of the furrow is more than 15 cm, and it is covered with mulch.

Colonization. Determination of planting period: planting as soon as possible on the premise of ensuring that there is no freezing after planting, and planting in Chengde area is generally in late April and early May.

Temperature index requirements: the minimum night temperature is higher than 5, and the soil temperature is higher than 12 at 0 to 10 cm. The cucumber in the autumn dew field adopts the method of live broadcasting.

Planting density: 4000 to 4500 acres, planting in large and small rows, small row spacing 40 cm, large row spacing 80 cm, plant spacing 25 to 30 cm, planting with dark water method.

Manage. Sockets. After planting, the shelf should be planted as soon as possible, and the seedling should be pumped by wind, and the shelf can be a flower stand or a herringbone frame, about 8 to 10 cm away from the root.

Tie vines. The "8" method is used to tie vines to prevent abrasion of stems and vines and sagging stems. Every 2 to 3 knots are tied, should be carried out in the afternoon, the stem vine is easy to break in the morning, the tightness of the vine should be suppressed and the weak should be strengthened, and the growth of the plant should be tied a little tighter, and the height of the growth point is consistent.

Pruning and pinching. For the main vine, all the side branches should be removed, and one or two leaves should be left after the side vine is fruitful, and all the tendrils should be removed. When the stem exceeds the head of the shelf, it is necessary to pinch the tip in time to promote the growth of the lower melon, or you can also take the method of twisting the tip to inhibit the growth of the upper part.

Fertilizer and water management. Timely watering and cultivating, the amount and frequency of water depends on the weather and growing period. Slow seedling water is watered 5 to 7 days after planting; water control, cultivating, and squatting seedlings before sitting on melons; When the root melon is 10 to 12 cm long, water the melon; Watering during the fruiting period is done every 5 to 7 days.

The principle of top dressing is that the front is light and heavy, a small amount of many times, urging melon fertilizer to be applied after the root melon sits, and the melon fertilizer is carried out after the root melon is harvested. Promote the use of organic fertilizer topdressing.