What determines the pre bud and post budding use of herbicides 5

Pre-bud herbicide is a kind of soil sealing treatment, generally used before sowing or within three days after sowing to apply pesticides, so that weeds can not grow, but with the extension of time, the decomposition of the effect in the soil, there will still be weeds growing.

Post-bud herbicide is a herbicide used for post-emergence weeding, generally used in the 3-5 leaf stage of crops, and the weeds start to be applied at the 2-4 leaf stage to get rid of weeds, but also according to the type of agent and the different types of crops, the application period is also different, for example, rape is suitable for weeding at the 5-leaf stage, wheat is suitable for the 3-leaf stage, and rice can be weeded in one leaf and one core at the earliest, etc.

When using herbicides, we must choose pesticides with high safety and good weeding effect. In order to avoid causing the weeds not to die, but to expose the crops to herbicides.

It is mainly determined by the mode of action and mechanism of action of herbicides. It is used for sealing before budding, and is absorbed through the germ sheath and hypocotyl of ununearthed seeds, and after budding, it is mainly treated with stems and leaves, and absorbed through weed leaves.

It is mainly determined by the characteristics of the herbicide. Pre-bud weeding should be selected after the crop is sown to the ground spray before germination, to achieve the effect of soil closure treatment herbicide, post-budding herbicide is mainly for weeds foliar treatment of herbicides, it should achieve the purpose of high efficiency for weeds, while ensuring the safety of crops.

Precautions for pre-bud herbicides and post-bud herbicides, pre-budding herbicides must be used before seedlings germinate, and the dilution ratio should not be too high. When using post-tooth herbicides, pay attention to the concentration of the ratio.

When using, we must pay attention to the growth of crops, and then choose the right agent according to the situation, and also pay attention to the appropriate temperature and weather, and then we also need to do a good job of ventilation.

Pay attention to the use of pesticides, but also pay attention to the impact of pesticides on sprouts, but also pay attention to the specific use methods, pay attention to isolation methods, to ensure the survival of sprouts.

We should pay attention to the way of use, the skills of use, the time of use, the angle of use, the protection of oneself when using, and the damage to crops.

Pay attention to the impact on the sprouts, but also pay attention to the hazards, do a good job of isolation measures, and at the same time to ensure the growth of sprouts, but also pay attention to the use of herbicides.

The so-called pre-seedling (or pre-bud) treatment, mainly refers to the crop before sowing (or before transplanting), or before the crop sowing emerges, soil spray treatment to close and kill the unseeded weeds, corn field such herbicides include amide acetochlor, refined metolachlor, triazine atrazine, etc., can prevent a variety of annual grasses and some small seeds broad-leaved weeds in the field.

If there is no pesticide application or the soil sealing effect is not good during this period, you can choose to use post-seedling herbicides to spray the stems and leaves of the emerging weeds, including sulfonylurea nicotiosulfuron (Ishihara Japan), etc., and the control effect is okay.

We must pay attention to the strict use of the technical points and precautions in strict accordance with the labels and instructions of herbicides and pesticides to avoid pesticide accidents.

Summary. It cannot be mixed.

Herbicides are chemical agents, and the ingredients of various types are different, so if they are mixed, they will cause chemical reactions, and in severe cases, they will become ineffective. So, it can't be mixed!

Can pre-bud herbicides be used at the same time as regular herbicides?

It cannot be mixed. Herbicides are chemical agents, and the ingredients of various types are different, so if they are mixed, they will cause chemical reactions, and in severe cases, they will become ineffective. So, it can't be mixed!

I'm going to spread the Manila turf on the ground, and now some grass is growing, and I'm going to use herbicide to kill what has grown, and I'm going to get rid of what hasn't grown yet.

Manila lawn weeding can be treated with glufosinate-ammonium + dimethyltetrachloride herbicide, dosage of a bucket of sprayer glufosinate-ammonium plus a bottle cap of dimethiclochloride herbicide, remember that the concentration should not be too high, otherwise the Manila lawn will die, these pesticides can kill most weeds.

Pre-budding herbicides, also known as soil treatment agents, are used before the emergence of crops after sowing, and the use of pesticides is only fixed in the topsoil layer (about 1-2 cm), and does not leach deeply, killing or inhibiting the weed seeds that can germinate in the topsoil, and the crop seeds can germinate and grow normally because of the protection of the covering soil.

This "bud" refers to the bud of the weed, not the bud of the crop, such as the transplanting field also has a pre-bud herbicide The explanation upstairs is a bit wrong.

Commonly used paddy field soil treatment agents are: prochlor, butachlor, benzsulfuron, oxachlor (Nongsita), saxial phosphorus, etc.

Commonly used dryland soil treatment agents are: acetochlor, atrazine, thiensulfuron, pendimethalin (Shitianbu), ethoxyfluorfen, ethylcarboxyfluorfen, prometrinet, besulfuron, etc.

1. Before budding, acetochlor can be used 150 ml per mu of wheat to seal the ground before sowing, which is the experimental experience of farmers and has not been demonstrated by experts.

2. After budding, you can use green melon, wheat shuang, etc. [chemical name Bensulfuron] to control annual broad-leaved weeds in wheat fields, and spray 9-15 grams per mu of stems and leaves at the 3-6 leaf stage of weeds after the 4-leaf stage to before jointing of winter wheat. Spray the stems and leaves with -butyl ester at the end of winter wheat tillering to the beginning of jointing, 45-50 grams per mu to control broad-leaved weeds, and can only be used once per season.

What is a pre-emergence fiefdom herbicide? How and when to use it? How much? are all exquisite.

Some herbicides are absorbed by the germ sheath or young shoots during the germination and unearthing of the seeds, and play a herbicidal role. For example, the effect of flulelin on a variety of grasses and weeds is mainly absorbed through the germ sheath. Alachlor and acetochlor also act on weeds through bud absorption, and the amount of medicine absorbed through the roots is very small.

In addition, the seeds of some weeds also have an absorption effect on herbicides.