Can corn post emergence herbicides be applied with pesticides?

1.Mixed application period: The best time to apply herbicides after corn seedlings is the 2-5 leaf stage of corn, when corn resistance is very high and it is not easy to cause fertilizer damage.

These stages are the peak of grey planthopper and thrips infestation, and in recent years, some locust pests have affected some areas. Therefore, the control of planthopper and locust pests requires a mixture of drugs. The selection of drugs must be with good safety factors, water-soluble preparations, and very high safety performance.

00 Start the sprayer up and down. At this time, after overnight digestion and absorption, the spray will make the liquid stay on the weeds for a longer time, so that the herbicide components can be fully digested and absorbed, thereby improving the experience of using herbicides. At this time, the harm of cooling to corn is very small, and the safety performance is very high.

Yes, even at this time, it is the peak period for pests and diseases such as gray planthoppers, whiteflies, and grass borers to go out. At this time, the actual effect of the sprayer on pest control is quite prominent.

3.Common problems of mixed insecticides: there is no need to spray organophosphate insecticides about 5 days after spraying post-emergence herbicides, and the risk of fertilizer damage is still quite large. At the same time, try to wrap the leaves around the heart to prevent the adverse effects of cardiac infusion.

4.Introduction of mixed insecticide varieties: When mixing corn post-emergence herbicides and insecticides, insecticides with weak purpose must be selected.

The focus is on the control of corn borer and grass borer. The main products are emamectin, benzoate, avermectin, cypermethrin, lice urea, chlorantraniliprole and other insecticides. This device can be used with post-emergence herbicides, so it must be mixed now, and the prepared drugs do not need to be left overnight.

Note that corn herbicides should not be mixed with untested fertilizers such as organophosphates. Preparations for the control of rice whitefly and planthopper include acetamiprid, acetamiprid, thiamethoxam, pymetrozine, cyfluthrin and other drugs. This medicine can also be mixed with corn herbicides, and the safety factor is no problem before mixing.

However, in the case of rice whitefly and gray planthopper, the heart leaves of corn need to be sprayed, which may cause fat damage. It is advisable to separate the medications and try not to mix them.

No, phosphine is highly toxic and has a long residual effect period, which will seriously endanger human health and even cause current poisoning. The Ministry of Agriculture has long banned its use on crops.

You can shoot twice, spray herbicides on 3-5 leaves after corn seedlings, and if there are still weeds, it is best to spray them a second time along the ridge.

When is the corn post-emergence herbicide ready?

The interval between the two drugs is less than 7 days. Corn treated with organophosphate agents had a large change in post-emergence herbicides.

Use a motorized sprayer to apply pesticides, do not increase the amount of pesticides without authorization, and prohibit repeated spraying.

Before using herbicides, pay attention to cleaning the sprayer that has been sprayed with organophosphorus pesticides.

After 4 p.m., it is good to use medicine to control weeds, and avoid using drugs in continuous hot weather (temperature over 35).

The main technical measures for seedling management are mainly:

Seedling inspection, seedling replenishment, seedling determination, fertilizer and water management, cultivating and weeding, common pest control, etc.

Seedling inspection and replenishment: the whole seedling is the basis for a good yield of corn. Due to the quality of seeds and the harm of rodents and insects, there will be different degrees of lack of seedlings after corn sowing, and seedlings should be checked and replenished in time.

There are not many seedlings missing, and the method of transplanting seedlings and replanting can be adopted. It is best to transplant with soil in the afternoon on a sunny day or on a cloudy day, which is conducive to improving the survival rate.

Seedlings and seedlings: seedlings are generally carried out in the 3 4 leaf stage, if the seedlings are too late, the root system between the seedlings and plants is staggered, and it is not easy to seedlings. The principle of thinning seedlings is to remove the weak and retain the strong, keep the dense and thin, and keep the evenness and strong.

Seedling setting is carried out at 4-5 leaves. For plots with serious underground pests, the number of seedlings should be increased and the seedling time should be appropriately extended. Seedling setting should be carried out in the afternoon on a sunny day.

In addition, the appropriate amount of seedling fertilizer can be applied to the seedlings in combination, and eccentric fertilizer can be applied according to the seedling conditions to promote balance, generally about 1500 kg of decomposed manure water per mu, or Shi Trim water-soluble fertilizer.

Corn post-emergence herbicide can be played twice, however, one thing to pay attention to, that is, there should be a certain interval between the two times, and then the second time after the first production period, the general residual effect period of corn post-emergence herbicide is seven days later, so that you can play the second herbicide after the first herbicide interval of seven days, so that it is safer.

This suggestion is for your reference, and I hope to look forward to it.

OK. Corn seedling fertilizer is generally applied when the plant has grown to 3-4 leaves after emergence. With the rapid growth of plants, the amount of fertilizer required is increasing, and the seedling fertilizer should follow the principle of early application and light application.

The temperature is also gradually rising, during this period, the rhizomes and leaves of the plant are in a period of vigorous growth, and the development of rhizomes and leaf reproductive organs requires a lot of nutrients.

At this time, it is necessary to fertilize skillfully, and grasp the amount of fertilizer and fertilization time to avoid the crazy growth of corn, which can play a role in strengthening the stalk and promoting the ear, and reduce the occurrence of empty stalks, baldness and lodging of corn. When the corn grows to 6-7 leaves, it is necessary to fertilize, and organic fertilizer can be applied per mu or strip with Yanwo high nitrogen water-soluble fertilizer. It should be noted that the amount of fertilizer can not be increased at will, which is easy to cause excessive vegetative growth, thereby affecting the reproductive growth of corn.

Corn booting stage, that is, after the appearance of corn "big horn", the female spikelet and florets of corn begin to differentiate, and timely reapply the bud fertilizer, which can promote the normal development of the ear and increase the grain, generally 14 days before heading, the bud fertilizer is applied in a timely manner. If the base fertilizer is insufficient and the growth of corn is weak, it is necessary to increase the amount of fertilizer, and the rotting farmhouse fertilizer and Yanwo microbial agent can be applied per mu, and at the same time, according to the soil moisture, appropriate watering to replenish the water.

Corn herbicides can be applied a second time in case of poor weeding effect. The best time for weeding: 3-5 leaves of corn seedlings and 2-4 leaves of weeds.

It is recommended to spray herbicide after 6 o'clock in the evening, because corn needs 2-6 hours of absorption process after spraying herbicide, if sprayed during the day, the temperature is too high and the light is too strong, and the liquid will volatilize quickly, affecting the weeding effect. The mixture of 2,4-d butyl ester could not be applied after the 5-leaf stage of maize. Corn post-emergence herbicides, it is necessary to purchase herbicides containing safety agents, and the commonly used post-emergence herbicides in corn fields are basically nicosulfuron, mesotrione, atrazine compound.

Generally, the time for two doses on both sides is at least 7 days apart. It is usually sprayed only on weeds, not corn, and is sprayed in a directional way. Meet the conditions required to hit the second time:

Rain immediately after the pill; Heavy rain or torrential rain, for a long time; After 3-5 days for broad-leaved grass and 5-7 days for sharp-leaved grass, there is no poisoning, and the corn grows normally. It is not recommended that the rain is not heavy and short; After spraying the corn seedling herbicide for 6 hours, after rain; Weeds have been poisoned; It is not recommended to re-spray to avoid pesticide damage.

We have used herbicides in rural farming, more or less, and we must use them according to the instructions, otherwise the consequences will be unimaginable: if the herbicide used before the corn seedlings are unearthed, they must be used before the seedlings, so that the corn sprouts will not be harmed; If the herbicide is applied after the corn seedlings are unearthed, it will harm the corn leaves, if the drug is excessive, the leaves will dry up, and then die, the farmers' hard work will be in vain, both destroy the seeds and mistake the farming, the gains outweigh the losses!

There is no effect, but first make sure you are using a herbicide that can be used after the corn seedlings.

Let me give you an analysis: corn post-emergence herbicide refers to the herbicide used after corn sowing and germination, which is first required to be safe for corn after emergence, and secondly, the effect of weeding. Then, since the post-seedling is safe, the corn used before the seedling has not germinated, the amount of the agent absorbed is lower, and the safety is higher.

Therefore, there is no problem with pre-seedling use, and there is no need for any remedy.

It is worth noting that the corn post-emergence herbicide you use is used in the inter-row weeding method of corn seedling, so you should use different methods for different pesticides. Such as other crops, etc.

So: first determine whether the corn post-emergence herbicide used is safe for corn. I don't know if you know that.

As the name suggests, pre-seedling herbicides should be applied before the emergence of seedlings, and after the emergence of seedlings, it may kill the corn together.

Corn pre-emergence herbicide will cause damage to corn seedlings after planting, so it is not possible to apply pre-seedling herbicide after corn seedlings.

Yes, you can do it twice, but be aware that no matter how you spray the first time, you must spray it along the ridge when you spray it a second time. The pesticide damage caused by the application of post-seedling herbicides in corn fields and the control effect of jujube weeds, spraying post-seedling weeding "six to six don'ts" requirements, in order to achieve the goal of good treatment effect of weeds in the field and free corn from pesticide damage. 1. When applying pesticides in corn fields:

It is necessary to distinguish the varieties and do not blindly use medicines". Since now the corn seedlings are posterior. Huaihu.

Try to do it all over again! In case the soil pesticide residues are high, the seedlings will not grow in the next season. Unless five tons of powdered organic fertilizer are applied to the mu after the corn is harvested, this can be beaten twice.