What to do with onion planting raw bugs? How do you grow onions from onions?

Onion is a crop with high economic value, is a kind of vegetable that people love, has high nutritional value and medicinal value, due to pests and diseases, resulting in poor quality of onion, seriously affecting its economic value.

Onion seedbed cataplexy seedbed 5 days before sowing and transplanting, spray once with 72 Pulik 500 times solution, 4 liters per square meter.

Onion downy mildew should be sprayed with 90 ml of carleli, and sprayed again every 7 days.

Onion gray frost disease is sprayed with 800 times of Shijiale and 3000 times of Haolik, and then sprayed once on the foliar surface every 7 days.

Onion Purple Spot Disease 43 Holik 3000 times solution plus Antaisheng 1000 times solution, foliar spray, spray again every 7 days or so.

Leaf miner flies are used per acre.

70 2 grams of Emilor plus 5-10 ml of enemy killing, can also treat aphids, thrips, and prevent yellow dwarf.

Root maggots per kilogram of onion seeds with 60 grams of Gaoqiao wet seed dressing 40 grams, or 5 Ruijin special suspension agent 60 ml of seed dressing.

It is normal to grow onions with raw insects, and you can use the following methods to prevent smelting.

Underground pests soil silkworms, bite off rhizomes, can be used trichlorfon mixed with wheat to trap and kill.

Aphids, with oyster line.

Red spider, kill mite spirits.!

Cabbage worm, cyanomethrin chloride.

For propagation with onion bulbs, the bulbs can be soaked in 40 45 warm water for 90 minutes, dissipated in cold water, dried and planted.

Soak the onion bulbs in 45 warm water for 90 minutes, remove them and cool them in cold water, dry them before planting.

Second, onion sowing and seedling raising method.

Onions are generally mostly dried seeds, but in order to facilitate germination and early emergence, they can also be soaked and germinated, the specific method is: soak the seeds in cold water for 12 hours, wrap them in gauze after fishing, promote germination below 20 25, rinse them with water once a day, and sow them in time when the seeds are just white.

According to many years of experience, onion seedlings are better sown wet than dry. The bottom water is full, and the irrigation depth is not less than 6 cm to meet the needs of onion seedlings. Irrigation in the middle of the process will cause the seedbed to solidify, which is not conducive to the healthy growth of whole seedlings and onions.

Onion sowing adopts the sowing method, the specific procedure is: before sowing, take a layer of seedbed topsoil sieve as a cover soil for backup, and then water the bottom water, the soil is moist to a depth of 15 cm, and the seeds can be sown after the water seeps down. In order to spread evenly, the seeds can be properly mixed with fine sand soil before sowing.

After sowing, cover the furrow with a cover of about 1 cm of soil, scrape it flat with a wooden strip, and cover the furrow surface with a shade net or wheat straw. Or take strip sowing, first on the seedbed furrow surface according to 9 10 cm spacing to draw a shallow ditch with a depth of centimeters, along the ditch after sprinkling the seeds with a broom across the soil, and then with the foot to the sowing ditch solid after watering. In order to control underground pests, 50 grams of 50% phosphine per mu can be added with 1 kg of water, mixed with 5 kg of fried wheat bran and sprinkled on the furrow.

The amount of onion sowing is related to the cultivation of strong seedlings and the early sprouting. Onions should be sown before seed germination test, according to the germination rate to determine the amount of sowing. Generally, the sowing amount of seedbed per mu is 4 5 kg (1 mu of onion planted must be closed, and the amount of seedling seed is 120 150 grams), and the ratio of seedbed area to planting field is about 1:

15。The density is too high, and the seedlings are weak; If the density is too small, the seedling growth is too large, and it is easy to have early sprouting.

After the onion is sown, it is necessary to cover the soil in time, mix it with rotten farmhouse manure and sieve it, and cover the thickness of the rice. If the soil is too thin, it is easy to produce "hat seedlings", which causes the onion to take too shallow roots and die, or although it is not dead, the growth is not robust, and it is easy to produce lodging; Covering too much soil will also affect the whole seedling.

Onion sprouting does not require light, and there are no excessive requirements for oxygen. After the onion is sown, it should be mulched or covered with grass in time to keep the soil moist and prevent heavy rainfall. Mulch can be shaded nets, straw, reeds, etc., and heavy corn stalks should not be used.

Where conditions permit, it is best to use shade nets.

Each region has its own suitable sowing period. This is a conclusion that has been drawn from production practice for a long time, and it should be observed and not changed at will. If the seedlings are sown too early in autumn, early budding may occur in the second year. Sowing too late, the nutrient body of seedlings is too small, and it is difficult to overwinter, which will also bring adverse consequences to production.

When planting and opening, you should first use a knife to slowly cut off the part of the root at the bottom of the onion, about one-third of the onion, and find a cool position to dry the mold after cutting, mainly to dry the incision, generally for 2 days.

Furrow fertilization: Choose a sunny plot for furrowing, the height and width of the furrow is 27cm, and then apply the rotting organic fertilizer. Seed germination:

Soak the onion seeds in cold water for 12 hours, after which they wrap them in a towel. Start sowing: Spread the seeds evenly on the ground and transplant when the seedlings are 5 cm high.

Water and fertilizer management: appropriate watering, increase phosphorus and potassium fertilizer.

1. Fertilize furrows

Before planting onions, it is necessary to choose a sunny plot, and then make a furrow, the furrow is high, the furrow is 27cm wide, and the furrow surface is leveled after applying phosphorus and calcium, and the organic soil miscellaneous fertilizer that is well decomposed is used as the base fertilizer, and then the fertilizer and soil are mixed evenly.

2. Seed germination

Before planting onions, the seeds should be germinated, soaked in cold water for no more than 12 hours, and then wrapped in a damp cloth and placed in a place of 20-24, during which they should be washed with water once a day, and sown in time when the seeds have just been exposed.

3. Start sowing

After the soil is ready, evenly sprinkle onion seeds, and start transplanting when the seedlings grow to 5cm, generally planting row spacing of 20cm, plant spacing of 16-17cm, density of 20,000 plants per mu, pay attention to the selection of healthy seedlings.

4. Water and fertilizer management

About 20 days after the onion is planted, it enters the slow seedling stage, and it is advisable not to water a large amount of water to keep the soil slightly moist, and pay attention to the application of phosphorus and potassium fertilizers, and avoid excessive nitrogen fertilizer, so as not to cause excessive growth in the aboveground part, and the emergence of sprouts or delay the expansion of bulbs.

In the spring of February and March every year, the onion seeds are soaked in clean water for about 10 12 hours, and then the loose and draining soil is selected, and the soil is disinfected with carbendazim and other agents, and the onion seeds are sown into the soil, the humidity of the air needs to be maintained, and the ambient temperature is controlled at about 20, and it can take root and germinate after waiting for a week.

Onions can be sown in spring 2 to 3 months, first select larger excellent onion seeds, and then soak the seeds in clean water, need to soak for about 10 12 hours, which can improve the survival rate of seeds, but also promote the seeds to take root and germinate quickly.

Every time you plant onions, you need to choose loose and drainable, fertile soil, usually we can plant onions into humus soil, before sowing onions, we also need to spray carbendazim on the soil, disinfect the humus soil, can prevent seeds from suffering from pests and diseases.

Regarding how to plant onions, you need to sow the processed seeds into the soil, cover the soil and a plastic film, which can maintain the humidity of the air, and then control the ambient temperature at about 20, put it in a cool and ventilated place, and wait for a week before the seeds will germinate.

The growth rate of onions is very fast, it is necessary to water and fertilize the onion in time, when it germinates and needs to be placed in the sun for maintenance, watered every 3 days, watered every rainy day, and applied rotten organic fertilizer every 10 days, so as to make the onion grow more vigorously.

The specific steps for onion planting are as follows:

Tools: onions, bulbs, shovels, rakes, organic fertilizers, small mud shovels.

1. Plant in a sunny or partially shaded and breezy place, not in heavy clay soil.

2. Use a fork to loosen the soil and remove weeds and large stones.

3. Use a rake to rake out a flat surface, if the soil is relatively poor, you need to add some organic fertilizer before sowing.

4. Compact the soil with both feet or rake heads, and then gently rake the surface layer of the soil.

5. Choose firm and plump onion bulbs, not very soft or too small.

6. Dig a row of small holes in the soil, you can put a rope to ensure that the holes are in a straight line.

7. Dig a hole with a small mud shovel to a suitable depth, that is, after putting the onion bulb in, the bud at the tip can just be exposed, and gently press the soil around the onion bud with your fingers.

8. Water the onions in spring, but not in autumn and winter, and onions can be harvested in late spring.