What skills should you master when planting radish to avoid insect pests?

Cruciferous radish is an annual or biennial herbaceous plant with a conical shape, 20 100 cm high, red, white and green skin, ** on the warm coast of Eurasia, it is one of the oldest cultivated crops in the world. Radish is very common in China, its roots are vegetables, its seeds, dry roots, and leaves can be used in medicine, and it has good economic value.

No living environment. Radish is a semi-Korean vegetable that can be grown in all seasons in areas with a suitable climate, and most of them are one of the main vegetables grown in autumn and winter, and its seeds can germinate at 2 3 degrees Celsius, and the suitable temperature for growth is 20 to 25 degrees Celsius. Radishes have a high demand for water, the effective water content of the soil is between 60% and 80%, and the higher the air humidity, the higher the quality of the radish.

The main pest of turnips: Radishes are susceptible to pests. Its roots, leaves gnaw. The main pests are aphids, cabbage worms, earthworms, earthworms, etc.

The occurrence time and scope of damage are different for each pest. Some occur during the germination period of turnips, which affects the growth and flowering of turnips, and some occur during the swelling period of turnips, which affects the swelling and formation of roots.

Aphids are also known as greasy bugs. Absorb plant sap, spread viruses, multiply quickly at high temperatures, and suffer serious losses. Cabbage worm is the larvae of cabbage butterfly, mainly feeding on leafless, cabbage larvae eat less, weak tolerance, prevention time is best in the larval stage.

Both of these pests can spray 1000 to 1500 times more marathon cream.

Caterpillars are the most harmful to larvae, and may cause rootless rot in the later stage, and larvae will die in large numbers when the temperature is below 20 degrees Celsius and the humidity exceeds 75%. The larvae of turtles are collectively referred to as more than 30 species that occur in vegetable gardens, which can not only gnaw the seeds of radishes, but also bite off the roots of seedlings and kill plants. To prevent earthworms, HEFC can be sprayed into 1000 to 1500 times the solution spray or roots.

Of course, it is not only pests that harm the growth of radish, but also powdery mildew, black rot, virus diseases and other diseases. When we grow turnips, we can prevent them in time to minimize losses. Timely detection of pests and diseases and timely prevention can achieve good yields.

The main pests that harm radish production are aphids, cabbage caterpillars, yellow-striped beetles, etc. The main diseases are downy mildew, black rot and viral diseases. For pests, use avermectin and imidacloprid.

For downy mildew and black mold, use syllam, carbendazim, and chlorothalonil. For viral diseases, agricultural streptomycin can be used.

The following matters should be paid attention to when planting radish: (1) Seedlings are set between seedlings. Small seedlings with 2 leaves and one heart during the seedling, the plant spacing is maintained at 6-7 cm.

2) Watering. In the early stage of growth, the temperature is unstable in early spring, the growth of plants is small, and the water is not much, so it is not suitable to water more, and it is generally sprinkled once every 10 days or so. From the "off-the-shoulder" to the harvest of the fleshy roots rapidly expanding period, the temperature is rising day by day, the plant growth is large, the need for more water, to be properly watered, generally 5 7 days to water once, often keep the soil moist, in order to waterproof the radish due to lack of water caused by bran and hair roots, affecting the quality.

3) Dig the leaves to promote the stems. In early March, the arch shed planting should start to release the wind, which can prevent the leaves from growing and promote the hypertrophy of the stems. (4) Top dressing.

Pay attention to ventilation after fertilization to prevent ammonia poisoning. (5) Pest control: insect pests mainly include aphids, cabbage insects, etc.

Aphids can be sprayed with 10% imidacrine wettable powder 1500 times or aphid lice Teck emulsifiable concentrate 2000 times liquid spray. Brazen insects can be sprayed with 2000 times of anti-Taibao emulsifiable concentrate for control.

1. The main pest of radish shiny. Radish is easily harmed by pests, its roots and leaves will be eaten, the main pests are aphids, cabbage worms, borrowers, grubs, etc., each pest occurs at a different time and range. Some occur in the seedling stage of radish, which may affect the growth and flowering of radish, and some occur in the expansion stage of radish, which affects the expansion and formation of rhizomes.

2. Aphids, also called greasy insects. It feeds on plant sap and spreads viruses that multiply quickly in high temperature conditions, and the harm is very serious. The cabbage insect is the larvae of the cabbage butterfly, mainly gnawing on the radish leaves, the larvae of the cabbage worm eat a small amount, the drug resistance is poor, and the control time is best in the larval stage.

Both of these pests can be sprayed with a thousand to fifteen hundred times the liquid of marathon emulsifiable concentrate.

3. The larvae of the borer are the most serious, and the larvae can cause rot of the radish roots in the later stage, and when the temperature is lower than 20 degrees Celsius and the humidity exceeds 75%, the larvae will die in large numbers. Grubs, a general term for the larvae of beetles, occur in more than 30 species in vegetable fields, not only gnawing on the seeds of radishes, biting off the rhizomes of seedlings, and possibly killing the plants. When controlling grubs, you can spray or irrigate the roots with a solution of 7.5% cyhalothrin and imidacloprid 1,500 times.

Hello, small radish cultivation technology fertilization and sowing. Apply 2500-3000 kg of high-quality farm fertilizer per mu, mix 20-30 kg of diammonium phosphate to the ground, turn the fine harrow deeply, and then make a 1-meter-wide furrow or a ridge 25-30 cm apart. When the soil moisture is not good, make moisture 2-3 days before sowing, sow 4-5 rows per furrow, sow one row per ridge, sow in strips, cover the soil 2 cm thick after sowing, and when the topsoil is dry, slightly suppressed.

Post-broadcast management. The first is seedling management. After sowing, keep 20 --25 during the day and 10--13 at night.

After the emergence of seedlings, it should be kept at 15--20 during the day and 8--10 at night, not less than 4. After the true leaves, the seedlings are divided into two times, and the plant spacing is between 10 and 15 cm according to different varieties. The second is water and fertilizer management.

About 15 days after sowing, it enters the "belly breaking" period, followed by 15 kg of ammonium nitrate or 20 kg of ammonium sulfate per mu, watered after top dressing, and watered again after 15 days. Watering must be carried out according to the characteristics of different growth periods. Under normal circumstances, the greenhouse radish is watered while planting, and the seedling water is watered again 3 5 days after watering, until the first ear of fruit sits down like egg yolk and then watered again.

The early planting is smaller, the foliar transpiration is small, the number of fruits is small, and the ventilation is also small, so it can be watered once in 7 10 days, (the amount of water should be small). Later, with the growth and development of the plant, the number of fruits increases, the amount of ventilation increases, the amount of transpiration increases, the number of watering intervals should be shortened and the amount of watering should be increased, the soil should be kept dry and wet (mainly wet), generally can be watered in 5 7 days, and the soil should be kept moist during the harvest period to increase the weight of a single fruit.