Active ingredient mainly contains two kinds: a kind of is that effective ingredient is pacified for going barnyard grass, and another kind is sulfonylurea herbicide (any in bensulfuron-methyl, pyrazosulfuron or the cinosulfuron).

Go barnyard grass peace (0xaziclomefone), its structural formula is

Bensulfuron-methyl (bensulfuron methyl) chemical name is 2-{[(4,6-dimethoxypyridin-2-yl) amino carbonyl amino] the sulfonyl methyl } methyl benzoate, its molecular formula is: ester is C ₁₆H ₁₈N ₄O ₇S, acid is C ₁₅H ₁₆N ₄O ₇S.Its structural formula is

Pyrazosulfuron (pyrazosulfuron-ethyl) chemical name is: 5-(4,6-dimethoxypyridin base 2-carbamyl sulfonamides)-1-methylpyrazole base-4-ethyl ester; Its molecular formula is: C ₁₄H ₁₈N ₆O ₇S; Its structural formula is:

Yellow grand (cinosulfuron) chemical name of ether is 1-(4,6-dimethoxy-1,3,5-triazines 2-yl)-3-[2 (2-methoxy ethoxy) phenyl sulphonyl] urea; Chemical formula is:

C ₁₅H ₁₉N ₅O ₇S; Its structural formula is:

Going barnyard grass peace is to absorb translocated herbicide, is mainly absorbed by weeds root and cauline leaf base portion, weeds leaves and stems chlorosis, stops growing, until withered.Chemical test is the result prove, with inhibition DNA, protein, amino acid, the lipogenesis of existing weed killer herbicide, suppresses mitotic mechanism of action difference, and this weed killer herbicide has new mechanism of action.In addition; Find that in the wheat water culture experiment activity of weeding that goes barnyard grass to pacify can be along with adding plant hormone GA ₃And disappear, therefore infer the mechanism of action and the plant endogenesis GA of this weed killer herbicide ₃Metabolic activity hinder relevant.In addition, because the absorption conduction in paddy rice, weeds and the difference of accretion rate make and go the barnyard grass peace to have high selectivity, to rice safety.Go barnyard grass peace efficient, Monochoria vaginalis, short arrowhead are had certain effect paddy field barnyard grass grass, moleplant seed, mexicana, difformed galingale herb, but to anti-heterodynes such as flat bar Fischer grass, needle spikesedge herb, Procumbent Falsepimpernel, false loosestrife, convexutricle sedge herb, firefly Lin, sweet wine intestines.

Sulfonylurea herbicide (in bensulfuron-methyl, pyrazosulfuron or the cinosulfuron any) is a kind of selectivity inner sucting conduction type weed killer herbicide, can be absorbed by root of weeds and blade, and transfer to the weeds complete stool very soon, can hinder the amino acid whose biosynthesis of weeds, thereby stop cell division and growth, but as safe as a house to paddy rice, be suitable for different soil properties, various types of paddy field weeding.Before bud or the bud post processing, annual and perennial broad leaved weed and sedge weed all there is good preventive effect, as four leaf duckweeds, pondweed, Monochoria vaginalis, short arrowhead, flat bar Fischer grass, needle spikesedge herb, Procumbent Falsepimpernel, false loosestrife, convexutricle sedge herb, lustrous and transparent Lin, sweet wine intestines etc., but poor to the preventive effect of grassy weeds such as barnyard grass grass, moleplant seed.

On producing, go barnyard grass peace and bensulfuron-methyl (or pyrazosulfuron, or cinosulfuron) all to can be used for rice seedling bed, live field, seedling throwing field, transplant field weeding.Under one situation, go the barnyard grass peace to use separately, consumption is about 2.7～3.3 gram effective ingredient/mus.Bensulfuron-methyl uses separately, and consumption is about 1.5～2 gram effective ingredient/mus.Pyrazosulfuron uses separately, and consumption is about 1.0～1.5 gram effective ingredient/mus, and cinosulfuron uses separately, and consumption is about 1.3～2.0 gram effective ingredient/mus.Singly under actual conditions, malignant weeds such as barnyard grass grass, moleplant seed, short arrowhead, mexicana all take place simultaneously, but spend the harm that barnyard grass peace or bensulfuron-methyl (or pyrazosulfuron, or cinosulfuron) all can not reach disposable control weeds.

In sum, the problem one of going barnyard grass peace and bensulfuron-methyl (or pyrazosulfuron, or cinosulfuron) to exist is to kill grass to compose extensively inadequately, and every kind of weed killer herbicide list usefulness all has the part weeds effectively not remove; The 2nd, remove the peaceful product cost of barnyard grass height, by independent using dosage, farming is originally at 15～16 yuan/mu; The 3rd, the peasant uses two kinds of weed killer herbicides with in use, and then for using method, key points for operation etc. are difficult to again grasp when using with, actual being difficult to promotes.