What herbicide does wild leek use?

Weeds in the field are the enemy of leek production, which grow fast and often form the phenomenon of weeds bullying seedlings; Manual weeding is labor-consuming and time-consuming, and it is not easy to remove, so the better method at present is chemical weeding. Then chemical weeding may leave phytotoxicity, so it is necessary to add Anbijie, a crop safety antidote, which can not only prevent phytotoxicity, but also alleviate phytotoxicity without affecting the efficacy of herbicides. What are the common products of leek herbicide? How to use leek herbicide correctly? The following contents will give you a detailed introduction:

Common products of leek herbicide

One is weeding after sowing and before germination.

(1) weeding. It is a new herbicide, which is ideal for newly planted leeks and has good weeding effect. The residue period is 4O~5O ~ 5O days, and 33% herbicide100 ~150g is used per mu, and about 50kg is sprayed on the ground. ② Dilamin. A herbicide for leek field is basically safe for leek, and has good weeding effect, with a lasting period of about 30 days. 200g of 48% bisamide EC is used per mu of land, and about 50kg of water is sprayed on the ground. ③ prometryne. The effect of application in leek field is also good, lasting for 2o ~ 3o days, but it has slight phytotoxicity to leek, so it is necessary to increase the seed quantity1o% when sowing. Moreover, medication in sandy soil is more harmful and should be banned. 85 ~ 90g of 50% prometryne wettable powder is used per mu of land, and 50kg of water is sprayed on the ground. In addition, 500 ~ 750g of 25% herbicide wettable powder can be used instead of spraying.

Leek and chives-special for leeks and Cyperus rotundus

Second, weeding after leek seedlings are unearthed

The growth period of newly sown leek is as long as 4 ~ 5 months, and the residual period of pesticide treatment before bud after sowing is only 20 ~ 50 days. Once the efficacy expires, weeds can still breed in large numbers. Therefore, leeks still need to be used again after emergence.

1. Soil treatment after emergence The herbicides used in this period should be harmless or slightly harmful to leeks, with the emphasis on preventing new weeds from being unearthed. The main herbicides used are 33% herbicide EC 100 ~ 150g, 48% trifluralin EC 100 ~ 150g, 48% diamine EC 200g and 50% prometryne wettable powder 100g. Because the above chemicals are used for soil treatment, they are basically ineffective for growing weeds, and they need to be manually weeded for 1 time before application.

2. When the herbicide was not applied before seedling treatment, or the efficacy of the herbicide used 1 time had passed, it was too late to weed artificially, and a large number of weeds appeared, resulting in grass shortage. Commonly used herbicides are: 20% naproxen EC 65 ~ 100g per mu or 25% ether EC 750 ~ 100g. Among them, taking the net has the best effect, but it has no lethality to broadleaf grass (such as purslane). After the weeds dry up, manually pull out or treat the soil according to the previous method to prevent the weeds from happening again.

3. When the stems, leaves and soil are treated by accelerating germination and sowing, weeds and leek seedlings will be unearthed at the same time, or the opportunity of soil treatment will be missed after sowing, and weeds will grow in large numbers. When 20% paraquat aqueous solution is used in combination with any of the above chemicals for soil treatment, it can be sprayed on both stems and leaves and on the ground, and the effect is good.

Pan Yao, a special herbicide for leek

Correct use of leek herbicide

In large-scale leek production, relying on manual weeding often leads to grass shortage due to untimely weeding, which seriously affects the growth of leek. Using corresponding chemical herbicides and using drugs scientifically can save a lot of manpower and significantly improve economic benefits.

1. Weeding technology before or after sowing

The seed coat of leek is thick, which is difficult to absorb water and slow to emerge. It generally takes 15 ~ 20 days to emerge after sowing in spring. However, weeds germinate quickly and grow fast. According to this characteristic, the herbicide 20% paraquat aqueous solution, a contact herbicide, has a significant weeding effect on sowing plots. The general dosage is 0/50 ~ 250g per 667m2/kloc, 50 ~ 70l of water is added and sprayed evenly on the ground. In the small seedling stage of weeds, the dosage can be appropriately lower, and the dosage per 667m2 is 150 ~ 250g. It should be noted that paraquat is an inactivated herbicide, which is effective for all monocotyledonous weeds. This drug is not selective and must be used before leek appears to avoid drug damage. However, once paraquat comes into contact with soil, it is completely adsorbed and passivated, with no residual effect, no damage to plant roots and no influence on the emergence of leek buds. Before the emergence of leeks after sowing, 50% prometryne wettable powder can also be used to treat the soil with 265,438+000g per 667m or 60-70g per 667m2.

2. Weeding technology at seedling stage

After emergence of leek, 33% herbicide EC can be used, with the dosage of 667 m2 150g, watering not less than 50l, and spraying evenly on the border. Herbicide is a broad-spectrum herbicide which can kill annual monocotyledonous weeds and dicotyledonous weeds. It mainly inhibits the root and stem meristem of weed seedlings, so it is ineffective for weeds that have already grown, and should be used before weeds are unearthed. Herbicide is safe and effective for leek, and its lasting period is as long as 40 ~ 60 days. 48% trifluoling EC can also be used in leek seedling stage, and the dosage is 667 square meters150 ~ 200 g. Because trifluoling is volatile and photolytic after spraying on the ground, it should be cultivated at 1 ~ 3 cm after application.

Jinjiufu, a post-emergence herbicide in leek field

3. The weeding technology of leek transplanting or rooting.

When transplanting leeks, trifluralin or weeding can be used before and after transplanting, and it is better to use it after transplanting. 48% trifluoling EC 150 ~ 200g, 33% herbicide EC 170g/667 m2. After harvesting the old leek, clean up the big grass in the field. After the wound is healed, water it 1 time, and then spray it to the last crop. For monocotyledonous weeds in leek field, 20% naproxine EC can also be used, with the dosage of 150g/667 m2 each time. According to the situation of weeds in the field, it is usually used twice a year. Dicotyledonous weeds can use 25% Nongsida EC, and each time use 200 grams per 667 square meters. This drug is contact-killing and has the best control effect when weeds spread out.

4. Field weeding technology

Weeds often grow in large areas of leek fields in rainy seasons in summer and autumn, so 10% glyphosate aqueous solution can be used, and 400 ~ 500 grams of water and 50 liters of water are sprayed on the grass every 667 square meters, preferably in the middle of weed growth.