What are the weeds in peanut fields? When will the herbicide after peanut seedlings be hit? Which medicine works better? Attached herbicide formula

Everyone should use the herbicide after peanut seedling every year, but some people often use it badly every year, or it will cause drug damage and have no effect after playing. When will the herbicide be hit after peanut seedling? Which one is better?

Species of weeds in peanut field

There are three main types of weeds in peanut fields: Gramineae weeds, broad-leaf weeds and Cyperaceae weeds. The Huang-Huai River Basin is dominated by Gramineae, accounting for 60% of the total number of weeds, 20% Mel 30% of broad-leaf weeds and about 10% of Cyperaceae weeds.

Gramineae weeds: Artemisia mandshurica, Euphorbia angustifolia, Setaria angustifolia, barnyardgrass, Kentucky bluegrass, etc.

Broad-leaved weeds: iron amaranth, anti-branch amaranth, concave amaranth, purslane, abutilon, field twirling flower, playing bowl flower, duckweed, quinoa, green grass, quinoa, morning glory, thorns and so on.

Cyperaceae weeds: Cyperus roxburghii, etc.

When should I use the herbicide in peanut field?

The best application period of peanut herbicide is the 2-4 leaf stage of weeds, the weeds are too small, some of them grow in the later stage, the weeds are too large, the resistance is high, and the dead weeds are not complete.

Do not give medicine in the high-temperature period at noon, two reasons, one is to evaporate too fast, the effect is not good, the other is to prevent heatstroke, their own safety problems, generally choose to take medicine before 10:00 in the morning and after 16:00 in the afternoon.

Which is good after peanut seedling herbicide?

1. Quizalofop

Function characteristics: through weed stem and leaf absorption, upward and downward two-way conduction in the plant, accumulation in the apical and intermediate meristem, inhibition of cell fatty acid synthesis, weed necrosis.

Control object: it has a good control effect on Gramineae weeds in broad-leaved crop field.

Application method: Gramineae weeds 3-5 leaf stage, stem and leaf spray.

Note: air and soil moisture are beneficial to the absorption and transmission of quizalofop by weeds.

2. Alkenone

Action characteristics: after application, it can be quickly absorbed by the stems and leaves of Gramineae weeds and transmitted to the stem tip and meristem, inhibit the activity of meristem, destroy cell division, and finally lead to the death of weeds.

Control object: it has special effect on most annual and perennial grass weeds and is safe for dicotyledonous crops.

Application method: weed 3-5 leaf stage, spray treatment.

Note:

1. It is critical to master the appropriate period of application, and the control effect of enoxone on weeds before and after 3-leaf stage is slightly poor.

two。 It has no pre-budding effect on weeds. Pay attention to the effect of climatic conditions on the efficacy, such as drought, high temperature, low temperature and other conditions, a large number of stomata closed, stratum corneum thickened, which are not conducive to the absorption of weeds.

3. Spray in the morning and evening should be chosen in summer, which is beneficial to the absorption and efficacy of the medicine.

3. Promethazone

Control object: control broad-leaved weeds and Cyperaceae weeds, but have no effect on Gramineae weeds.

Application method: the weeds were sprayed at the 2th and 5th leaf stage of peanut.

Note:

1. Because this product is mainly contact killing effect, the stems and leaves of weeds must be fully moistened when spraying.

two。 High temperature, sunny weather is conducive to the efficacy of medicine, so we should try to choose high temperature and sunny days to apply medicine; if the weather is dry, waterlogging or temperature fluctuations, the effect is poor, and easy to cause damage to crops.

4. Ethoxyfluoxane

Functional characteristics: through the coleoptile, mesocotyl into the weed, through the root absorption is less. Only under the condition of light can the drug exert its activity and produce toxic compounds that are toxic to plant cells.

Control object: to control annual monocotyledonous weeds, but not to narrow leaves or perennial weeds.

Application method: pre-bud application requires a large dose, and the effect is poor, so post-seedling spray treatment is generally used.

Note:

1. Do not increase the dosage at will; after spraying, when the temperature is too high or the local contact with the drug on the crop is too much, it will produce different degrees of burn spots, because it does not have the effect of internal absorption and conduction, after 10 to 15 days, the crop returns to normal and does not cause a reduction in yield.

two。 Using the correct application technology, it is best to choose the fan-shaped nozzle and apply along the ridge to avoid serious drug damage caused by repeated application.

3. The dosage should be selected according to the specific situation, and the low limit of the recommended dosage can be used when it is a sensitive weed.

4. It can only be effective under light conditions, so it should be applied on a sunny day.

5. Fluorosulfen

Functional characteristics: it can be absorbed by the roots and leaves of weeds, making it wither and yellow and die quickly.

Control object: control broad-leaved weeds and Rhizoma Cyperus, and also have certain control effect on Gramineae weeds.

The method of spraying was sprayed at the stage of 1-3 compound leaves and 2-5 leaves of weeds after emergence of peanut seedlings.

Note:

1. Under adverse conditions such as drought in the field, the leaves of peanuts will be damaged, and in severe cases, they will wilt temporarily, but they can return to normal after a week.

two。 The residual period of fomesafen in soil is long, so the dosage should be strictly controlled, and the sensitive crops in the next crop are easy to cause drug damage, so the safe crops should be selected.

6. Milk fluorine herbicide

Function characteristics: weeds absorb chemicals through stems and leaves, destroy cell membranes and make weeds dry up and die.

Control object: control broad-leaved weeds.

Application method: before the 4-leaf stage of weeds, spray treatment.

Note: when temperature and soil moisture are beneficial to the growth of weeds, the efficacy is high. The safety of Ruflunzaoling to crops is poor, and there will be different degrees of drug damage after application, but the leaves grow normally in the later stage.

Common herbicide formulations in peanut field

1. Quizalofop + ethyl carboxyfluoxane: the price is very cheap, but the weeds are easy to rebound, and it has no effect on Cyperus roxburghii.

2. Quizalofop + fluosulfonate: the price is more expensive than the first one, but it is not easy to rebound, and it is also ineffective for Rhizoma Cyperi. It should be noted here that the data reaction, the use of this formula in the north, is easy to cause drug damage, and the south is relatively stable.

3. Quizalofop + bentazon: the price is higher than the above two, mainly hit Rhizoma Cyperi, but the quantity should be increased appropriately, there will be no residue, and the effect on other weeds is general.

4. Quizalofop + bentazon + trifluorocarboxylate: ternary compound, first of all, the effect is better than the above binary compound, and it has good effect on common weeds and aconite in peanut field, and there is no residue. The only difficulty is the price, which is 2-3 times more expensive than the commonly used one.

5. Quizalofop + bentazon + fluosulfen: it is also ternary compound and has a good effect on weed control, but compared with point 4, this formula can also be used in soybeans, that is to say, peanuts and soybeans can be used as herbicides. The price is not low.

Matters needing attention in the use of herbicides in peanut field

1, when dispensing, remember the second dilution, the specific method: pour the medicine into the bucket (or in the medicine car), first add part of the water to dilute, dilute well, add a large amount of water, in order to make the liquid more uniform, will not appear in the same piece of land, one piece due to a large amount of drug damage, the other piece, the grass does not die.

2. When there is stagnant water in the field and Rain Water and dew on peanut leaves, do not hit herbicides. Why? Afraid of drug damage, when there is water on peanut leaves, herbicides are sprayed to form large water droplets, and then flow into the heart leaves, at this time, the concentration of herbicides in heart leaves is too high, which is very easy to cause drug damage.

3. Don't hit herbicide when the seedling is weak. What is the seedling weakness? The plant is short, yellowing and wilting, which may be caused by seeds, insect pests, diseases, etc. No matter what the reason, do not hit the herbicide at this time, because the peanut seedling itself is weak, once the herbicide is not used well, the drug damage is inevitable.

4. Pay attention to the drift phenomenon. For example, there are corn, vegetables, sesame and other crops planted nearby. If the medicine is applied in windy weather and the wind blows the liquid to the crops next door, resulting in drug damage to the crops next door, then wait for the neighbors to pay for it.

Pay attention to the weather when the pesticide is applied

Look at the weather, because the temperature has an effect on the activity of herbicides and the ability of crops to absorb drugs, so the dosage is in the upper limit when the temperature is low, and the dosage is in the lower limit when the weather is good and the temperature is high.

Pay attention to the seedling condition when applying the pesticide.

Look at the seedling situation, according to the seedling situation to decide not to use medicine, thin seedlings should not be applied, otherwise it will produce drug damage.

Pay attention to the grass condition when applying the pesticide.

Look at the grass situation, the investigation of weeds clearly, mainly Gramineae weeds or broad-leaf weeds, the size of grass, select the right herbicide varieties, the right medicine, to achieve high weed control effect, large grass should be appropriately added.

The use of herbicides in Peanut Field

Three criteria

The application time of ① should be accurate. The application time should be strictly controlled according to the weed control mechanism of herbicides.

The dosage of ② should be accurate.

The area of ③ application plot should be accurate. There are the concepts of time, area and accurate dosage for the control of Gramineae weeds during the growing period of peanut. Otherwise, the weeding effect will not be achieved, or the crops will be harmed by drugs.

Five no

The weak seedlings of ① were not treated with medicine.

The stagnant water in ② field was not applied.

③ poisonous soil is too dry or the soil is too dry to apply pesticide.

④ did not apply pesticide when it rained heavily or when there was dew on the leaves. Rain Water did not apply pesticide.

The leaking field of ⑤ was not treated with pesticide.