What medicine should be used in front of the soybean seedlings and when to play?

Acetochlor: Apply 3-5 days before emergence. Chlorimuron-methyl: Apply 3-5 days before emergence. Metribuzin: soil treatment 3-5 days before emergence. Pineapple: closed weeding after sowing and before seedling emergence. glyphosate: 2-3 days before emergence.

Acetochlor

Acetochlor (50% acetochlor, 90% acetochlor, 90% Shengnong Shi, 90% Weisi) is generally used as soil treatment, and can be applied 3-5 days before emergence after sowing.

2, but it should be noted that in the soybean seedling arch period application will lead to phytotoxicity, especially in the case of the same control broadleaf weed mixture, in the soybean seedling arch period application, may cause yield reduction, soil closed herbicide dosage, need to be adjusted according to soil type, and organic matter content.

Chlorimuron-methyl

1, chlorimuron-methyl (bean sulfuron, bean grass methyl) can be used before or after the emergence of soybean seedlings, but the use of seedlings is easy to produce phytotoxicity, so it is not recommended to use, generally used for soybean seedlings before the emergence of soil treatment, in soybean seedlings after sowing, 3-5 days before emergence available 20% chlorimuron-methyl 60-75g per hectare.

2. Chlorimuron-methyl can effectively control weeds such as Xanthium sibiricum, Elsholtzia, Abutilon theophrasti, Lycopodium angustifolium, Musk petal flower, Polygonum multiflorum, Chenopodium album, etc., and it has inhibitory effect on weeds such as Equisetum arvensis, Cirsium grandiflorum, Polygonum circinatum and Gramineae, but it has poor efficacy on Stellaria chinensis, Solanum nigrum and Commelina communis.

Trioxazinone

Metribuzin (metribuzin) can generally be selected after sowing soybean seedlings, 3-5 days before emergence of soil treatment, metribuzin can effectively control amaranth, Chenopodium, Polygonum, Stellaria, Xanthium, Lycopus and other broad-leaved weeds.

IV. Pineapple

1, Yiweicao pine (Guangmieling, Tiandeji, Doucaoling) can be used for soybean seedlings before sowing, or closed weeding before sowing, can also be used for early stem and leaf treatment after seedling.

2. It can effectively control annual grass weeds and broadleaf weeds such as Setaria, Barnyardgrass, Digitaria, Solanum nigrum, Elsholtzia, Spina spinosa, Portulaca oleracea, Abutilon theophrasti, Setaria chinensis, wild watermelon seedlings, Chenopodium album, Polygonum sibiricum, Lycopodium chinense, etc., and it has certain inhibitory effect on perennial weeds such as thistle, thistle, arsetum, and endive.

5. glyphosate

1, glyphosate (Roundup, Klingda, Holida, farmer music) can be used to control early spring weeds in newly opened wasteland and other plots with perennial weeds.

2. After waiting for the weeds to emerge, spraying glyphosate 2-3 days before the emergence of soybean seedlings can effectively control the perennial weeds that have been unearthed, and glyphosate has a strong internal absorption and conduction effect, which can generally kill the underground part of the plant, thus reducing the harm of the second year.