Can cucumber planting and green onion intercropping prevent aphids?

Cucumber, (Cucumis sativus linn, Cucumber), cucumber in the family Cucurbitaceae. Also known as courgette, cucumber. The fruit is oily green or emerald green in color, with small soft thorns on the surface.

It is widely cultivated throughout China and is now widely cultivated in temperate and tropical regions. Cucumbers like warmth and are not tolerant to cold, and are one of the main greenhouse products. petioles slightly rough, with rough bristles, 10-16 (-20) cm long; Leaves broadly ovate-heart-shaped, membranous, 7-20 cm long and wide, very rough on both sides, covered with coarse bristles, 3-5 angular or shallowly lobed, lobes triangular, toothed, sometimes marginal hairs at the margins, apex acute or acute, base bent semicircular, 2-3 cm wide, cm deep, sometimes the base is close to the back.

Monoecious. Green onions, scientific name: allium fistulosum giganteum makion), is a type of green onion, which can be divided into four types: ordinary green onion, divided green onion, green onion, and floor onion. The green onion has a pungent taste, slightly warm in nature, and has the effect of publishing Tongyang, detoxifying and flavoring, sweating, antibacterial and vasodilation.

It is mainly used for symptoms such as wind chill and cold, chill and fever, headache and nasal congestion, cold and abdominal pain, dysentery and diarrhea, internal obstruction of insect accumulation, milk blockage, and unfavorable stool. Green onions contain volatile oil, the main component of the oil is allicin, and it also contains diene inner sulfide and calcium oxalate. In addition, it contains fat, sugar, carotene, vitamin B, vitamin C, niacin, calcium, magnesium, iron and other ingredients.

It is a perennial herbaceous plant with cylindrical leaves, hollow in the middle, fragile and easy to break, and is blue. In East Asian countries and various Chinese areas, green onions are often eaten as a very common spice condiment or vegetable, and play an important role in oriental cuisine. In Shandong, there is a way to eat green onion dipping sauce.

Open field cucumbers. 1. Variety selection.

Varieties with high yield, strong disease resistance, good commerciality, and suitable for cultivation in spring dew should be selected.

2. Seedlings. The seedling age is about 35 days, and the standard of strong seedlings: the cotyledons are intact, with 3-5 true leaves, the internodes are short, the angle between the petiole and the main vine is 45 degrees, the leaf color is dark green, the leaves are thick, the stem is thick, the root system is developed, and there are no diseases and pests.

3. Fertilize and make furrows.

5 cubic meters of organic fertilizer for land preparation, fertilization and decomposition, 25-30 kg of superphosphate or 10-15 kg of diammonium phosphate (5-5 kg of superphosphate per cubic meter, 2-3 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.

4. Colonization. 1) Determination of the colonization period.

On the premise of ensuring that there is no freezing after planting, planting is generally carried out in the Chengde area 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 0-10 cm. The cucumber in the autumn dew field adopts the method of live broadcasting.

2) Colonization density.

4000 4500 acres of plants, planted in large and small rows, 40 cm in small rows, 80 cm in large rows, 25-30 cm in plant spacing, planted with dark water.

3) Field management.

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

b. Tie vines. The "8" method is used to tie vines to prevent abrasion of stems and vines and sagging stems. Tied once every 2 3 sections, 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 tightly, and the height of the growth point is consistent.

c. 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, and the method of twisting the tip can also be used to inhibit the growth of the upper part.

d. Fertilizer and water management. Timely watering and cultivating, the amount and frequency of water depends on the weather and growth 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 12 cm long, water the melon; Watering during the fruiting period is watered every 5-7 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.

The occurrence of cucumber aphids in a square is mostly with pesticides, but it can generally be prevented by mulching and other conditions.

1) Use silver-gray mulch film to cultivate or hang, which has the effect of repelling aphids, or use a yellow plate coated with adhesive to trap aphids.

2) Killing aphids with natural enemies such as lacewings and ladybugs is the most effective measure to overcome aphid resistance and avoid environmental pollution.

3) Pharmaceutical fumigation, before putting it in the evening, in a closed shed, you can use melon aphid smoke agent No. 1, fumigated aphid granule No. 2, smoke agent No. 4, direct fumigation to kill aphids.

4) For drug control, use 200 ml of 80% dichlorvos EC to 4 liters of water and mix 20 kg of fine sand, evenly sprinkle in the cucumber field for fumigation, 2% avermectin 5 ml square meters, or 1500 times of Uranus EC, or 8000 1000 times of 10% cypermethrin EC spray.

The control of aphids is not only to prevent the direct harm of aphids, but also to prevent the occurrence of viral diseases. Before seedlings or planting, fumigation of the greenhouse with dichlorvos can reduce the source of aphids. In the early stage of aphids, natural enemies such as ladybugs, aphid-eating gall mosquitoes, and Chinese lacewings are released to prey on melon aphids for biological control.

When the "central aphid strain" is found, timely use of pesticides to control it can effectively control the spread of aphids. The liquid can be 10% imidacloprid wettable powder 1000 1500 times solution, or 2. 5% cyhalothrin (gonggfu) emulsifiable concentrate 4000 times liquid, or 2.

5% bifenthrin emulsifiable concentrate 3000 times, or 25% thiamethoxam (Actet) water dispersible granules 500 times, or 3% acetamiprid (Mobilang) 3000 times liquid spray. Spray 2 3 continuously

If we want to prevent the occurrence of cucumber aphids, first of all, in the early days, we should save medicine on cucumbers, there is a medicine that is very good, can prevent the tooth species of cucumbers, this is detergent, because when you go to the market to buy this kind of thing, you can buy his ** on cucumber aphids is very good.

As soon as the cucumber seedlings arrive, you can spray them with a little wormline or cypermethrin.

How to prevent the occurrence of cucumber toothworm? Cucumbers can be medicated. According to. The proportion is adjusted for spraying. In this way, the occurrence of toothworms in cucumbers can be prevented.

To prevent cucumber toothworms, it is necessary to start at the beginning of cucumber growth. Spray a certain amount of pesticides.

To control melon aphids on cucumbers, use this method to kill insects thoroughly and cleanly.