What do you know about the use of pesticides in rice fields?

The common feature of chemical herbicides is that they have a strong effect on weeds at high temperatures and a weak effect on weeds at low temperatures. Therefore, herbicides should be applied about 15 days after transplanting in early rice fields, and 4-6 days after transplanting in middle and late rice fields. Application method:

After the dew is dried on a sunny day, use 500 600 grams of 25% herbicidal ether per mu, or 300 grams of 25% herbicidal ether plus 500 grams of sodium pentachlorophenol, or 250 300 grams of 50% chlorophenol, mix well with moist fine * 15 kg, stack for a long time, and then evenly sprinkle into the paddy field.

Do not drain <> 1 week, keep the water depth 3 6 cm. This method has a good effect on barnyard grass and cow hair grass, but has no effect on weeds such as clover, duck tongue grass and Cigu. Therefore, for these weeds, 70% dimethyltetrachloride 75 100 grams per mu can be used according to the situation, mixed with 40 kg of water, sprayed on the second day after the water is dried in the paddy field, and then irrigated again after spraying.

Half a month after the seedlings are transplanted, some paddy fields are prone to grow malignant weeds such as eye cabbage (also called bamboo grass).

When it grows 3 5 leaves, use 40 50 grams of 50% grass net per mu, humidify fine * 15 kg, sprinkle, and maintain a water depth of 3 6 cm for 7 days, the effect is better. It can also be used to flush 40 grams of herb net plus 100 grams of 70% dimethyltetrachloride, wet fine * 15 kg, and sprinkle. This method can not only kill the eye-word grass, but also kill the weeds such as sunshine wave grass, knotweed, duck tongue grass, mushrooms, water chestnut seedlings and so on.

The utility model relates to a solid pesticide preparation for paddy field, dosage per 10 acres is 10-500 grams, applied to paddy field filled with water, this pesticide preparation contains more than one pesticide active ingredient of 1-80%, and the disintegration value of water is less than 20 times at 25.

The commonly used methods of pesticides in paddy fields are: spray method and poison soil method. Pre-seedling treatment before or after sowing.

Before transplanting, use the poisonous soil method or spray method to rake the ground. WPs, emulsions, granules, powders. Common methods for pesticides are:

Spray, spray. Seed treatment, seed coating, seed dressing. Fumigation, the use of fumes in confined spaces.

Soil disinfection Soil treatment Furrow application, for granules. Trench application for granules. Common pesticide application methods for rice include spraying and spreading poisonous soil.

Be sure to choose the right agent according to the growth of crops, be sure to pay attention to the time of using the drug, pay attention to the efficacy, dilute it with water in advance, you can choose sprinkler irrigation or foliar spraying, and try not to use pesticides when the temperature is relatively high.

To use in accordance with the specific instructions of the pesticide bought, you can spray with water, pay attention to the number of spraying, but also pay attention to spraying each rice seedling in place, wear a mask when spraying, and cover your mouth and nose with gloves.

Be sure to choose different agents according to the different growth conditions of crops, you can use a duster to spray pesticides, you can choose the way of watering the roots, you can choose the way of leaf spraying, pay attention to the concentration, pay attention to the time of use.

Pesticides can be diluted or sprayed with a duster. Manual spreading can also be carried out. The spray method can be used. Be sure to control the concentration of pesticides.

It is often found wild in the humid land, at the edge of paddy fields or by streams and rivers in low mountainous areas. Also known as Tian soaphorn, water.

Acacia seeds, water pines and cypresses, water grass. You can try pyrisulfuron herbicides, flulometamide and isooxatrione, and weedan.

It is recommended that you contact your local agricultural technician to confirm the type of weed and the specific method of weed control before controlling weeds.

What do you know about the correct use of commonly used pesticides? The use of pesticides should not only be based on the types of crop diseases, insects, weeds, rodents and other pests, but also the correct use methods. It is required to accurately calculate the dosage of drugs, and strictly grasp the dosage of the dispensing concentration and timely application area.

Fumigation: Fumigation is a method of eliminating pests and diseases with fumigants or easily volatile gas fumigation, which is mostly used in closed environments such as warehouses and greenhouses, and some agents can also be used for household grain storage. It is characterized by the effective control of concentrated and hidden pests and pathogens.

Dusting: Dusting and dusting machinery to sprinkle powdered pesticides on crops or pests. Pesticides used for spraying are generally low-concentration powders or mixtures.

When there is no dusting instrument, it can also be sprinkled with soil methods. Dusting is the simplest application method, especially in arid areas and water-scarce mountainous areas, and is an effective means of controlling outbreak pests and diseases. However, the dosage is relatively large, the loss of the powder by wind and rain is relatively large, and the residual time is relatively short.

Poison bait: Mixed with stomach poison to make poison bait, which can be used to control underground pests and rodents. The bait can be rice, corn, wheat, wheat bran, rice bran, soybean meal, peanut cake, rapeseed cake, grass, etc.

The poison bait is generally mixed with the seeds, mixed evenly, or sprinkled directly in the sowing furrow before sowing.

Spraying and mist: spraying liquid drugs on crops and pests and pests with spraying equipment and pests on the leaves of the pesticide application method in a timely manner. The preparations for spraying include wettable powder, emulsifiable concentrate, aqueous agent, concentrated emulsion and emulsion.

The spray should be even, thoughtful, and appropriate (it is better to have the leaves fully moistened but not dripping). The finer the droplets, the smaller the spray volume. The advantage of spraying is that the amount of medicine consumed is small, the liquid medicine is easy to stick to crops and insects, and it has the ability to be easily blown away by the wind and resist rain.

Seed dressing, soaking and soaking seedlings: Mix the powder pesticide directly with the seeds in time, or spray the liquid medicine on the spread seeds, so that the seed surface is evenly covered with the drug and then stirred. After seed dressing, it is generally necessary to pile up for a certain period of time, so that the seeds can fully absorb the drug and play the role of the drug on the fumigation and poisoning of diseases and insects.

Choose the appropriate application method, pests have different lifestyles and activity parts, and different pesticide application methods should be adopted to achieve the purpose of preventing and controlling pests and protecting natural enemies.

When using pesticides, you must pay attention to the number of times, do not spray too much, and when using pesticides, you must pay attention to safety issues, do not bring unnecessary trouble to yourself, and you must pay attention to your words and deeds when using pesticides, do not hurt yourself, but I think the most important point is that you must wear the corresponding protective gear when using pesticides.

When using pesticides, we should use them in accordance with the instructions and the labels on the pesticide bottles, do not expand the dosage and spraying scope at will, wear rubber gloves and masks when spraying pesticides, use the spraying amount reasonably, and control the number of times to take medicine.

When using pesticides, pesticides and water should be mixed in a certain proportion. When in use, it must be used in a sunny place, never in a closed place, and after using pesticides, you must wash your hands frequently, and clean the exposed **.

I don't know much, but I know that the use of pesticides is mainly based on the season and temperature, and I should also choose some suitable methods for crops. It is necessary to adhere to the principle of reducing pollution and reducing the amount of pesticides used, so that pesticides can be used correctly.

In general, young larvae are less resistant to pesticides and become more resistant as they age. Therefore, when many farmers find pests and diseases, they start spraying too late, causing harm and making it difficult to exert the effect; In the process of spraying pesticides, it is not proportional and there is no special measuring tool, and when the concentration exceeds the regulations, it is not only easy to cause pesticide hazards, but also improve the resistance of pests and diseases. Some farmers even think that the higher the concentration of pesticides, the greater the control effect on pests and diseases, which is incorrect, but sufficient water consumption is very important.

Because bacteria and eggs are mostly concentrated on the back of the leaves, it is a mistake to simply increase the concentration of pesticides and ignore the amount of water used. When farmers choose pesticides, they often tend to choose pesticides with fast acting effects, and pursue timeliness too much, hoping that pests can be killed immediately after spraying. This thinking often leads to their crops with pesticide residues that are too high to meet standards; Therefore, farmers should pay attention to the slow efficacy of pesticides, which can only really play their role in the later stage of pesticides; Pesticides are commonly used in spraying, root irrigation, sprinkling, seed dressing and other methods.

Taking the spraying method as an example, the water is mixed into the liquid medicine according to the requirements of the instructions, and the pesticide is diluted and sprayed with a sprayer.

It should be noted that the dosage should be controlled, not too high or too low, protective measures should be taken, and the application time should be determined according to the type of agent. For example, some pesticides should be used at higher temperatures, while others should not be used at high temperatures. The mixed use of pesticides does not affect the stability of the active ingredient.

It can be mixed with chemical pesticides when controlling pests, but not with chemical fungicides, otherwise it will kill effective fungi; When mixed with alkaline pesticides, organophosphates and pyrethroids and dithiocarbamate fungicides produce complex chemical changes that destroy their active ingredients.

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According to the situation of crops, diseases, insects and weeds to grasp the dosage and concentration and applicable area, to use correctly, you can spray some pesticides on crops, so that you can eliminate the virus more balanced, and dilute it completely when using pesticides, so that the pesticide can better melt and the concentration is balanced.

Mix the pesticide with water according to the instructions for use, and then put it in an appropriate container and spray it, be sure to pay attention to safety during the spraying process, wear a mask and gloves, and do not spray it on your body.

First of all, we must prescribe the right medicine and find the right pesticide. And to learn new techniques. Be sure to go to a regular place to buy a regular pesticide. Pay attention to safe medication and do not allow yourself to come into contact with pesticides.

Herbicide is actually an auxin analogue, low concentration to promote plant growth, inhibition of plant growth after the concentration exceeds a certain range, generally dicots are more sensitive to auxin than monocots, so spraying the field with auxin that inhibits dicots and promotes the growth of monocots can remove dicot weeds (rice is a monocotyledonous plant, and weeds are generally dicots) Of course, weeds can also be pulled out manually.

Poaceae with barnyard chop stop or Tai Daowei.

Broad-leaved or sedge with grass raiders.