If there is a pest in the cultivation of radish, do you have to use pesticides?

The planting time of radish is to start sowing in May, and the planting is different in different regions, so it is necessary to choose the planting according to the local climate, and the varieties should not be planted too late or too early. The early cold climate will damage the seeds, and planting radishes too late will be cold, or the bran of radishes is not brittle, so it is necessary to arrange the sowing time reasonably when sowing. Choose a plot before starting sowing, preferably with obese soil.

Stopping is the most important point, first of all, apply enough low fertilizer, the fertilizer should be cooked with farmhouse fertilizer, it must be a corrosive agent. Because raw fertilizer will cause many germs to enter the soil and cause pests and diseases, healthy fertilizer will make the radish vigorous and free from rotten root disease. When building a ditch, it is better to raise the ditch so that the soil thickness, root depth, soft sunlight to prevent the roots from drying, not conducive to growth.

The rootless system of fertilization is developed, which is suitable for early deep ploughing and basic fertilization, and the soil should be applied to Chongqing area as 5 kg of organic circle fertilizer. Spray the surface of the soil with grass and wood, and then turn the soil deep and rake it flat to make the ditch better. According to the way of making furrows, radish is generally planted in autumn according to the variety, climate, soil quality and other conditions, and the furrow planting is generally 50 cm, about 30 cm high, about 20 meters wide, and about 1 meter wide.

Choosing Lao Luo is the key. It is suitable for local temperatures, if there is a high temperature and drought, you can sow late, carefully select the seeds, rinse the seeds before sowing, squeeze the seeds or remove the grains. And, open a shallow ditch at the top of the ditch, spray along the ditch, then cover with fine soil, water in the middle of the ditch, and then hug the flat surface.

The normal planting time here is between mid-July, so sowing is done before the beginning of autumn. The rural proverb is "Second Battle, Half-Brother", and radish is planted about 10 days before cabbage. From planting to harvesting, the time suitable for radish growth is only 3 months, so planting radish should not be too early or too late.

If planted early, the radish will produce a chaff-pumping heart, which will affect the quality of the radish. If the radish is planted too late, it cannot be harvested during the growing season, and the weather has become colder, especially in the frost season, which is prone to occur in the East China Sea.

The soil for growing radish requires a loose soil layer and good air permeability. The selected plots are suitable for 3 5 rotten farmhouse manure per acre, which can be said to be rotten chicken manure and sheep manure in the countryside. Sprinkle 15 kg of diammonium phosphate, 5 kg of potassium sulfate.

To achieve high value-added yields, the premise is to fertilize the soles of the feet. Deep flipping after application of fertilizer. The radish seeds should be full and even, without damage and no bad eggs.

To select and plant strong radish seeds for high-quality pests and diseases. The seed which can be coated is the best. If you buy seeds without clothing, you can mix them with your own pesticides to prevent various pests and diseases that occur during the planting process.

Pesticides must be used, because pests do not disappear easily, and if you want them to disappear completely, you have to use pesticides to get them away.

Yes, because there is no way to artificially control such pests, they can only be removed with the help of pesticides.

Yes. Moreover, pesticides can also avoid the damage of these pests to a certain extent, and can also increase the yield to a certain extent.

Yes, pesticides must be applied, otherwise these pests will not be destroyed, and there will be more of them.

Pesticides can be used in carrot fields, and pesticides can prevent insect pests, as follows:

1. Downy mildew.

Pharmaceutical control: 150 200 times of 40% frost blight wettable powder, 500 times of 75% chlorothalonil wettable powder, 600 800 times of Pulik water solution, spray once every 7 10 days, and 2 3 times of continuous control.

2. Black spot disease.

Pesticide control: use 600 times of 70% mancozeb wettable powder, or 600 times of 75% chlorothalonil wettable powder, or 400 times of 64% alum wettable powder.

In addition to pesticides with high toxicity and long residue period, they can not be used, and can be used with high efficiency, low toxicity and low residue; Specifically, it depends on insect control, disease prevention, and weeding, which can be specifically recommended!!

Pesticides that can kill gramineous weeds can theoretically kill gramineous weeds in carrot fields, but it is better to use less, and once the pesticide damage occurs, the loss cannot be recovered.

1. Efficient grass covering;

Second, the essence of quinoxalin.

The above two are effective against annual grasses and weeds. Please refer to the instructions for usage.

Carrot, also known as carrot, clove radish, cucurbit, also known as carrot, beetroot, yellow radish, etc., is an umbel-shaped biennial herb that eats fleshy roots as vegetables.

Carrots contain milligrams of carotene per 100 grams of fresh weight, the content is 5 7 times higher than that of tomatoes, and is digested and decomposed into vitamin A by gastrointestinal digestion after eating, which can prevent and treat night blindness and respiratory diseases. It can be fried, cooked, eaten raw, pickled, pickled, etc., and is resistant to storage. It is distributed all over the world, and is cultivated in the north and south of China, and the yield accounts for the second place in root vegetables.

It can fight cancer and is known as the underground "little ginseng".

It has been empirically proven that pendimethalin series herbicides can be used in carrot fields.

This agent is generally 33% pendimethalin EC EC. Most pesticide stores should be able to buy it.

Usage: Carrot, chrysanthemum, celery, chive field weeding: 150-200 ml of 33% vegetable grass emulsifiable concentrate per mu, add 40-50 kg of water, spray the soil surface after seed sowing, or before the chives root stubble and onion return to green, and 1-3 days before transplanting celery. Sandy soils must be used in low doses.

Before sowing, it is necessary to level the fine furrow head, and the depth of the field ditch is shallow.

Herbicide: Carrot (carrot).

Product name] vegetable herb pass.

Generic name: pendimethalin

Processed dosage form] 33% emulsifiable concentrate.

Dosage] 1125 ml of 33% herb per hectare. In Northeast China, below the soil organic matter, 33 liters of vegetable grass per hectare are used for sandy soil, liters are used for loamy soil, and liters are used for clayey. Above the organic matter of the soil, 33 liters of vegetable grass per hectare are used for sandy soils, liters for loamy soils, and liters for clay soils.

Use period] carrot after sowing before seedlings, within 5 days after sowing.

Control objects] barnyard grass, dogtail grass, early maturing grass, Kanmai Niang, autumn grass, horsetail, wild millet, brachial grass, camellia, pig disaster, heteromorphic sedge, quinoa, retrograde amaranth, concave amaranth, purslane, chickweed, curly stem knotweed, sorrel leaf knotweed, willow leaf thorn knotweed, nettle, sorrel, ground skin, etc.

Techniques used] 300 600 liters per hectare for manpower and more than 200 liters for tractors. After application in drought conditions should be mixed soil 2 to 3 cm.

Crop rotation] is safe for crop crops.

Summary. Dear, I'm honored to have your question The information that the teacher found for you here is: Are there underground pests when carrots emerge

There are underground pests when carrots emerge, and carrots are mainly underground pests and blight at the seedling stage. Select disease-resistant varieties to strengthen water and fertilizer management. Carrots at the seedling stage are susceptible to frost rot due to moisture.

Black spot, virus disease, soft rot, peach aphid, radish, etc. It is mainly the underground pests that bite the seedlings, and the aboveground part is mainly infested by aphids. During the growth process of carrots, underground pests mainly include mole crickets, grub troughs, ground tigers, needleworms, etc., resulting in dead carrot seedlings and broken ridges and deformed roots.

The main common pests and diseases of radish are root rot, downy mildew, and black heart disease.

Dear, it's an honor to answer your question The letter that the teacher found for you here is: Are there underground pests when carrots emerge: There are underground pests when carrots emerge Carrot seedlings are mainly underground pests and blight at the seedling stage.

Select disease-resistant varieties to strengthen water and fertilizer management. Carrots at the seedling stage are susceptible to frost rot due to moisture. Black spot, virus disease, soft rot, peach aphid, radish, etc.

It is mainly the underground pests that bite the seedlings, and the aboveground part is mainly infested by aphids. During the growth process of carrots, underground pests mainly include mole crickets, grub troughs, ground tigers, needleworms, etc., resulting in dead carrot seedlings and broken ridges and deformed roots. The main common pests and diseases of radish are root rot, downy mildew, and black heart disease.

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Spray the insect within a week after the radish emerges.

The use of pesticides should be stopped after the seedlings reach 38 days of age.

To ensure that the safety interval is more than half a month, choose 2000 times of 5% fipronil emulsifiable concentrate when spraying, and use 10% chlorfenapyr at the seedling stage.

Spray 1500 times of suspension emulsion once, and after 20 days of seedling age, then apply twice according to the occurrence of insect pests.

Beat the insecticide within a week after the radish emerges, stop using the insecticide after the seedling age reaches 38 days, ensure that the safety interval is more than half a month, so that the appropriate time to use the drug, the effect of the medicine to the insecticide, and the day of sowing should use 90% trichlorfon.

Crystals 1000 times liquid, 50% phosphine.

1000 times the liquid focus on spraying the ridge surface.

Within a week after the emergence of radish, it is necessary to spray 5% fipronil emulsifiable concentrate 2000 times in time to prevent and control the yellow koppy jumping beetle, and then spray it once with 10% fenfenapyr suspension emulsion 1500 times, after the seedling age is 20 days, it can be used twice more according to the occurrence of insect pests.

The main insect pests of radish are aphids and cabbage worms.

Cabbage borer, diamondback moth, yellow bend jumping beetle, etc., these pests mainly damage the leaves of radishes, and cabbage insects will lay eggs on the back of the leaves, and after hatching, they will harm the leaves, eat them into a notched shape, and their feces will pollute the leaves and spread soft rot.

Aphids on radishes can be treated with imidacloprid.

Or spray aphid mist and other agents for control, cabbage insects are sprayed with 5% anti-Taibao EC 2000 times, and vegetable borer is evenly sprayed with 2500 times kung fu EC, and the medication time is selected after 4 pm on a sunny day.

Summary. It can grow radishes and kill underground pests with phosphine. Phosphine is very effective in controlling and killing underground pests of vegetables and food crops, and can quickly decompose into non-toxic substances under light conditions.

It can grow radishes and kill underground pests with phosphine. Phosphine is very effective in controlling and killing underground pests of vegetables and food crops, and can quickly decompose into non-toxic substances under light conditions.

Can I turn the soil when turning the soil?

Is the amount per acre limited?

When killing underground pests, phosphine can be diluted with 50 ml of 50% emulsifiable concentrate and sprayed 1000 times per mu, which can control ground tigers; You can also use 100 grams of 50% emulsifiable concentrate + 5 kg of water, mix 50 kg of seeds evenly, and sow seeds after stuffing, which can also control underground pests.

Is it okay to sprinkle it directly in the soil?

Is it okay to sprinkle it directly in the soil?

You can also.

The main diseases of radish are black rot and virus disease, and the main insect pests are aphids, cabbage insects, vegetable borers, etc.

1. Viral disease: mosaic and leaf appear after the onset of the disease. The leaves are shrunken and deformed, the plants are dwarfed, and the roots are poorly developed, resulting in serious plant shortage and yield reduction. The disease is transmitted by aphids, and high temperatures (above 28) and drought favor the disease.

Control methods: early control of aphids; In the high temperature and dry season, fertilizer and water management should be strengthened to enhance the disease resistance of plants. sowing at the right time; Proper crop rotation.

2. Black rot: After the disease, the vascular bundle of the root turns black, and the inside of the fleshy root becomes black and rotten, resulting in black hearts, hollowness, and a particularly smelly atmosphere.

Prevention and control methods: the prevention and control should be done with cruciferous vegetables for crop rotation; timely control of pests such as cabbage worms and yellow bendt jumping beetles; Spray with 200 mg kg of streptomycin sulfate (equivalent to the concentration of the solution.

3. Aphids: mainly harm the leaves of radishes. Flocks gather on the back of the leaves and heart leaves to suck the sap, causing the affected leaf margins to curl back, the leaves to shrink, and gradually lose water and wither yellow, so that the plants are short, stunted, until they die, in addition, they can also spread viral diseases.

Control methods: 10% imidacloprid wettable powder 1000-2000 times liquid or 50% aphid mist wettable powder 3000-4000 times liquid spray control.

4. Cabbage worm: The adult cabbage worm lays eggs on the back of the leaves, like vertical wheat grains, which harm the cabbage leaves after hatching and eat a lot of missing moments. With the increase of insect age, the damage gradually increases, and sometimes only leaf veins remain, affecting the growth and development of plants. And feces contaminate the foliage and spread soft rot.

Control methods: should be 1-3 instar larvae when the application of pesticides, with a high-efficiency emulsion (8000 IU microliters) hall sell 1500 times liquid spray, add human laundry detergent when preparing the liquid, choose a light temperature higher than 15 cloudy days, cloudy days or on sunny days after 4 p.m.; Or spray with 5% anti-Taibao emulsifiable concentrate 2000 times.

5. Adult vegetable borer: Adult vegetable borer lays eggs on young leaves such as heart leaves, and after hatching, the first leaf is harmed, and after the second instar, the leaf surface is pierced and the leaf is decorated, so that the heart leaves die, and the 4-5 instar is bored by the heart leaf or petiole roots, and the affected plant dies.

Prevention method: grasp the egg incubation period and apply pesticides to prevent and control when the heart leaf is first damaged, and spray it with 2500 times of kung fu emulsifiable concentrate; or 50% phoxanthion EC 1000 times liquid spray.