Carrots need to be medicated, when is the best time to do it?

There is a popular proverb in the countryside"Head volt.

Radish, two-pronged mustard, three-pronged cabbage"。Why is it cultivated and planted in this season? In fact, there is a certain truth and scientific basis!

Why do you grow radishes in Futian? Because the physiological characteristics of radish are determined by its growth cycle. However, due to scientific and technological innovation, farmers have used high-tech techniques to grow out-of-season thinning vegetables.

Especially in greenhouses, photovoltaic greenhouses have created favorable conditions for vegetables, melons and fruits and edible fungi. It not only enriches the vegetable basket, but also makes our life convenient and nutritious.

Radish is delicious, it is rich in minerals, it not only regulates qi and moistens the lungs, but also regulates the stomach. It is often said"Eat radish in winter and ginger in summer, and do not ask a doctor to prescribe medicine", which is the ...... of this principle

It is very particular about growing radishes, and it likes to clear sandy soil. First of all, it is necessary to apply plantar fertilizer, and apply ternary compound fertilizer per mu.

Two bags. 80 kg of organic and inorganic fertilizer, a number of manure can be applied to increase the porosity of the soil, prevent soil compaction and radish forks. For timely weeding, special herbicides can also be used.

And strictly support the dosage and operating procedures.

Seedlings at the right time, do a good job in the prevention and control ...... pests and diseases

Answer: carrots from sowing seedlings to the formation of commercial fleshy roots, the growth period of most varieties is about 80-100 days, with the reference of carrot varieties in the number of days of growth period, and then by the local climatic conditions, the time of early frost damage, and the combination of the two is the appropriate sowing date for referring to the autumn planting of carrots.

Due to the long and narrow north and south regions of China, the difference in climate is relatively large, and the beginning of winter solar terms and the beginning of winter in the meteorological sense are also quite different.

I am located in Langfang, Hebei Province.

The climate is 100 kilometers away from Beijing Changping.

There is also a difference in the temperature between the beginning of autumn and the beginning of the winter solar term, and there is also a difference in the temperature of the beginning of the winter season'Before the gas, we here radish, Chinese cabbage harvest season, agricultural proverb has "the beginning of the winter should chop vegetables, do not cut to freeze" said, at present, the beginning of the autumn solar term, to the beginning of the winter will have 100 days, just barely meet the needs of carrots in the growth period, local farmers have the habit of planting Chinese cabbage in the summer season, during which will also be planted with some carrots, carrots, coriander, etc., mainly for their own consumption.

After the beginning of the autumn solar term, the temperature gap between morning and evening gradually increases, the meteorological conditions between the high autumn air and the enhanced sunlight are just the best conditions for the growth of carrots in autumn.

Basically do not hit, generally close to the winter planting time when there are fewer insects do not need to spray, more insects you can also choose to spray.

When it sprouts, because when it sprouts, its leaves are easily eaten by insects.

The seedling age stage is an important period for the prevention and control of radish insect pests, and the time and dosage of radish seedlings are different for different diseases. Provide you with several common insect pest medicine methods for radish:

Common insect pests in radish cultivation include yellow-striped jumping beetles, aphids and cabbage worms.

Vegetable borer, etc., insect treatment should be done "early" (appropriate period of medication), "quasi" (application site, such as leaf surface, leaf back, etc.), "skillful" (moth butterfly key prevention), so that the appropriate period of medication, medicine to insect extermination, generally 38 days after the seedling age to stop using insecticides.

Ensure a safety interval of more than 15 days.

1.Yellow striped jumping armor.

Gnawing on the newly unearthed seedling cotyledons, the damaged leaves are bitten at first, and then eaten into holes, only leaf veins are left in serious cases, and its larvae feed on fibrous roots, lateral roots and taproot root root bark, resulting in radish "numb face".

In severe cases, radishes cannot grow, and will crack roots, age, wilt, and can be easily pulled up and rot in large quantities.

Prevention and control methods. In autumn, the adult beetle of the yellow curved beetle is morning and evening or cloudy.

Hide under the back of a leaf or a clod of dirt, and are most active around noon.

1) On the day of sowing.

Timely use of 90% trichlorfon.

Crystals 1000 times liquid, 50% phosphine.

1000 times liquid or 80% dichlorvos.

1000 times the liquid is sprayed on the ridge surface to prevent and control the jumping adult worm of yellow bendle.

2) 3-5 days after sowing.

5% fipronidine emulsifiable concentrate 2000 times can be sprayed to prevent and control yellow koppy jumping nails.

3) About 5 days after that (seedling stage).

Then use 10% chlorfenapyr.

Suspension emulsion 1500 times liquid spray 1 time.

4) Radish seedlings after 20 days of age.

It can be controlled 2 more times according to the occurrence of insect pests.

5) Before and after the radish "breaks the belly".

Seedlings 4 5 leaves combined with fertilization, mixed with pesticides in fertilizer water to water the roots.

6) Radish growth season.

Choose the period when the adult activity is vigorous to spray pesticides, and adopt the encirclement tactics when spraying, that is, from the edge of the field to the middle, from the furrow to the furrow surface, from the ground to the plant, and from the bottom of the plant to the top, so as to improve the direct spraying effect of pesticides.

2.Aphids. It sucks the juice on the back of the leaves, causing the leaves to shrink and wilt, spreading diseases, and causing the quality of radish to decline and reduce yield.

Prevention and cure. Armyworms can be hung in the field.

Yellow plates to lure winged aphids.

When radish seedlings pull the cross stage (seedlings 2 3 leaves), you can use deltamethrin emulsifiable concentrate 2000 3000 times solution, 50% aphid carb wettable powder 2000 3000 times solution, 10% imidacloprid.

1000 times liquid spray, 10% cypermethrin EC 2000 5000 times liquid spray.

It is best to do it in the evening, when the effect is best, spray 1 time every 5 7 days, a total of 2 3 sprays.

Carrot seedlings post-seedling herbicides can generally choose high-efficiency flupyrethoxalin or quinoxalin, usually after the carrot seedlings are unearthed, spray with 50-75ml of flupyrethoxalin emulsifiable concentrate to control weeds, and when using quinoxalin, it is advisable to use the secondary dilution method, first dilute the liquid and additives with a small amount of water, and then pour it into a sprayer filled with water and stir evenly, and then spray, the dosage per mu is 2 bags of quinoxalin (30ml per bag), and each bag should be mixed with water 15-20kg. It should be noted that when using, it should be tried in a small area to ensure safety before applying it on a large area.

1. What medicine is used for post-emergence herbicides for carrots

1. Type of drug.

1) Post-emergence herbicides for carrots can generally be sprayed with high-efficiency flupyrethoxalin or quinoxalin for foliar spraying of weeds, which can usually control grassy weeds.

2) It should be noted that before using post-emergence herbicides, it is recommended to conduct a small area test to ensure that there will be no adverse effects on carrots before using them in a large area to ensure safe application.

2. How to use.

1) High-efficiency flupyramethoxalin.

Generally, after the carrot seedlings are unearthed, 50-75ml of flupyramethoxalin emulsifiable concentrate can be used to control weeds.

2) Quinoxalin.

Generally, it is necessary to use the secondary dilution method to use quinoxalin, and the dosage per mu is 2 bags of quinoxalin (30ml per bag), and each bag should be mixed with 15-20kg of water.

First, fill the container with a small amount of water, then put the liquid medicine and additives in it and stir thoroughly.

Then pour the liquid medicine into a sprayer filled with water, stir well, and then spray evenly on the stems and leaves of the weeds.

Second, when will the carrot herbicide be beaten

1. Time of use.

Generally, it is better to use herbicides within 3-7 days before carrot seedlings, which can not only get rid of weeds, but also reduce the impact of herbicides on carrot species, which is helpful to improve the emergence rate of carrots.

2. Precautions for use.

1) When using carrot herbicides, it is advisable to keep the soil moist.

2) For sandy soils with low organic matter content, carrot herbicides are generally not suitable for use.

3) For the high temperature season, if you need to use carrot herbicides, it is generally recommended to use them during the time of day when the temperature is relatively low.

It is best to use herbicides within 3 to 7 days before planting carrot seedlings, which not only eliminates weeds, but also reduces the impact of herbicides on carrot seeds, which is conducive to improving the emergence rate.

Carrot seedlings come out to apply herbicides according to the situation, you can't do it blindly, you have to grasp the timing, and you can't do it sooner or later.

You can do it before planting, or you can spray herbicides on the first day.