CN1046401C - Efficient paddy field weed-killer composite - Google Patents

Abstract

The present invention relates to a method of preparing a high-efficiency and broad-spectrum weed killer for paddy fields with the known amide type substances, such as acetochlor, metolachlor and butyloxamine, and sulphamide substances, such as metsulfuron methyl, bensulfuron methyl and metribuzin. The weed killer is sensitive to various monocotyledonous weeds or dicotyledonous weeds; the weight of the used effective components is only 2.5 to 2.8 grams per mu, and the total weeding rate can reach 90 to 98%.

Description

Efficient paddy field weed-killer composite

The present invention relates to the chemical herbicide that use in the paddy field, particularly with known amide-type and sulfonylurea herbicide combine efficiently, the Herbicidal combinations of wide spectrum, consumption pettiness.

In recent years, the research of chemical herbicide is very active, particularly since the eighties, various countries are at amide-type, many kinds have been released in sulfonic acid carbamide herbicides aspect, as alachlor, Acetochlor, isopropyl methoxalamine, butachlor, metsulfuron-methyl, bensulfuron-methyl, the grass jinx, green sulphur is grand etc., these weed killer herbicides are than six, the seventies has had large increase, consumption also greatly reduces, but it is narrower that these weed killer herbicide list times spent are killed the grass spectrum, what have only is applicable to the nonirrigated farmland, what have is only effective to barnyard grass grass and part nutgrass flatsedge, and it is invalid to most broadleaf weeds, have then to monocotyledon weed such as barnyard grass grass poor effect, so the weed killer herbicide consumption of unit are is very big will kill multiple weeds the time, increased the cost of grain-production.

Many in recent years data and patent documentation have been reported the effect and the broad spectrum activity that can improve weeding behind the various mixture of herbicides greatly.

The chemical property, purposes of various weed killer herbicides and other material that may be composite have been introduced by " farmland weed chemical control complete works " Shanghai scientific and technical literature publishing house (in December, 1992 version), can use with lorox, metribuzin etc. as isopropyl methoxalamine; Acetochlor can be used with atrazine, and butachlor and Lonster are used with, and careless jinx and butachlor, molinate etc. are used with, can improve herbicidal effect.

Disclose among the Chinese patent CN1078852 " preventing the weed killer herbicide of weeds in paddy field " that a kind of compound and salt thereof and butachlor or the third careless amine, bensulfuron-methyl, sand-grass are grand etc. to combine two yuan or ternary composition, obtain the fine herbicide of broad spectrum activity, this weed killer herbicide can be made into wetting powder, missible oil, emulsion, the aqueous solution, granule etc.

Chinese patent CN1074086 " Herbicidal combinations " discloses that Bensulfuron-methyl adds Acetochlor, Bensulfuron-methyl adds metsulfuron-methyl and Acetochlor combines binary and ternary weeding composition, and these two kinds of compositions have increased the broad spectrum activity of weeding, and consumption reduces, safety.But compare by analysis, still there is weak point in composition, and good inadequately to the broadleaf weed removal effect, the consumption of effective ingredient is still bigger.

The purpose of this invention is to provide the Compositional type Herbicidal combinations that herbicidal spectrum is wide, the effective ingredient consumption is low, safe.

The present invention adopts following several amide-types and sulfonylurea material to combine herbicidal composition:

One, acetamide-group herbicides:

Isopropyl methoxalamine (all thats)

2-ethyl-6-methyl-N-(1 '-methyl-2 ' methoxyethyl) chloro acetanilide

Acetochlor 2 '-ethyl-6 '-methyl-N-(ethoxymethyl)-2-chloro acetanilide

Butachlor N-(fourth oxygen methyl)-α-chloro-2 ', 6 '-diethyl acetanil Two, sulfonylurea herbicide, as: metsulfuron-methyl 2-[3-(4-methoxyl group-6-methyl isophthalic acid, 3,5-triazine-2-yl) ureido sulfuryl] methyl benzoate

Bensulfuron-methyl (Nongdeshi) 2-{[(4,6-dimethoxypyridin-2-yl) amino carbonyl amino] the sulfonyl methyl } methyl benzoate

Grass jinx 1-methyl-4-carbethoxyl group-5-{[(4,6-dimethoxypyridin-2-yl) amino carbonyl] amino-sulfonyl } pyrazoles

Above-claimed cpd adopts three kinds of active ingredients to cooperate, and promptly sulfonylurea adds a kind of formation Herbicidal combinations of amide-type for two kinds

Below be the composition composition:

A, metsulfuron-methyl+careless jinx+Acetochlor

B, metsulfuron-methyl+careless jinx+isopropyl methoxalamine

C: metsulfuron-methyl+careless jinx+butachlor

D, metsulfuron-methyl+bensulfuron-methyl+isopropyl methoxalamine

E, metsulfuron-methyl+bensulfuron-methyl+butachlor

The content of above-mentioned each composition is (weight %)

Metsulfuron-methyl 0.25-30%

Grass jinx or bensulfuron-methyl 0.1-50%

Acetochlor or isopropyl methoxalamine, butachlor 25-80%

Except that three kinds of active effective ingredients, can add wetting agent, filler, developer, adhesive emulsion and make formulations such as wetting powder, granule, emulsion.

Described wetting agent is alkylbenzenesulfonate, soap, soapberry fruit soak, ionic surfactant etc.

Described filler can adopt talcum powder, precipitated calcium carbonate, kaolin montmorillonite etc.

Described developer can adopt water-soluble good pigment such as iron oxide red, iron oxide yellow.

Described adhesive is starch or polyvinyl alcohol.

Described emulsifier comprises OP-13, OP-10,0201,1602, the peaceful breast of farming breast etc.

Composition A can prevent and treat barnyard grass grass, difformed galingale herb, cyperus iria, fescue, Monochoria vaginalis, mexicana, wild arrowhead, duckweed, Sagittaria pygmaea in the paddy field through test, also can be used for the wild weeds such as eleusine indica, green foxtail, lady's-grass in the control of maize ground.

Composition B can prevent and treat barnyard grass grass, the difformed galingale herb in paddy field, and cyperus iria, fescue, grass dragon, Monochoria vaginalis, mexicana, grass are imperial, also can prevent and treat weeds such as eleusine indica on the nonirrigated farmland, green foxtail, lady's-grass.

Composition C can prevent and treat weeds such as the barnyard grass grass in paddy field, special-shaped nutgrass flatsedge, cyperus iria, fescue, firefly Lin, Monochoria vaginalis, mexicana, pondweed.

Composition D can prevent and treat paddy land weeds such as barnyard grass grass, special-shaped nutgrass flatsedge, cyperus iria, brown fringe nutgrass flatsedge, fescue, Monochoria vaginalis, wild arrowhead, cusp flower, Brittle Falsepimpernel Herb, potamogeton grass, duckweed, polygonaceae plant, also can prevent and treat the upland weeds as composition A and B.

Composition E can prevent and treat paddy field weeds such as the barnyard grass grass, difformed galingale herb, cyperus iria, brown fringe nutgrass flatsedge, fescue, firefly Lin, Monochoria vaginalis, wild arrowhead, mexicana, polygonaceae weeds, four leaf duckweeds, duckweed, careless dragon in paddy field.

Below be embodiments of the invention:

Embodiment one, get 50 the gram acetochlor oils, add sodium alkyl benzene sulfonate 30 grams, kaolin 400 grams are crushed to 325 orders with airslide disintegrating mill, add again 30 the gram careless jinxs and 20 the gram metsulfuron-methyls, 20 the gram iron oxide reds mix, make the wetting powder that contains effective ingredient about 18%.

Embodiment two, isopropyl methoxalamine 50 grams, add sodium alkyl benzene sulfonate 50 grams, OP-13 emulsifier or peaceful breast 350 grams restrain dissolving back and isopropyl methoxalamine and emulsifier with small amount of acetone with careless jinx's 30 grams, metsulfuron-methyl 20 in addition, promptly obtain containing the emulsion of effective ingredient 20%.

Embodiment three, isopropyl methoxalamine 60 grams add soap powder 30 grams, talcum powder 400 grams, and bensulfuron-methyl 20 grams, metsulfuron-methyl 20 grams are put into and are crushed to 325 orders in the airslide disintegrating mill, promptly obtain containing the wetting powder of effective ingredient 18%.

Embodiment four, butachlor 70 grams add sodium alkyl benzene sulfonate 40 grams, precipitated calcium carbonate 400 grams, and careless jinx's 25 grams, metsulfuron-methyl 5 grams, developer 10 grams are crushed to 325 orders with airslide disintegrating mill, can obtain containing the wetting powder of effective ingredient about 18%.

Embodiment five, butachlor 25 restrain, metsulfuron-methyl 40 grams, and bensulfuron-methyl 35 grams, montmorillonite 400 grams, sodium alkyl benzene sulfonate 50 grams are crushed to 325 orders with airslide disintegrating mill, pack, and obtain containing the wettable powder of effective ingredient about 18%.Add 50 gram poly-vinyl alcohol solutions again, can be made into granule.

Product of the present invention entrusts provincial hygiene department to carry out rat acute toxicity test, and mix preparation greater than 5000mg/kg, belongs to the low-toxin farm chemicals level to big white mouse oral lethal dose (LD50).

Wetting powder of the present invention is made inner wrapping, every bag 15 grams, and quite effective ingredient 2.5-2.8 gram can use one mu of paddy field, comprises rice field and other water plants field, the control of single, double cotyledon weeds is imitated reach more than 90%, and the lasting period can reach 60-80 days.

Using method can and be planted in back 10 days paddy rice or water plants more, with medicament admix the fertilizer that topdresses or sand, soil spreads fertilizer over the fields, also available emulsion, aqua spray, as water layer 3-5cm should be arranged, water conservation 4-7 days when spreading fertilizer over the fields.

Product of the present invention is lower than the disclosed effective component content of CN1074086, and the broad spectrum activity of cutting weeds of going out is good.

The weeding principle of weed killer herbicide of the present invention is that biosynthesis such as leucine stop cell division and growth by the protease and the valine of weeds bud scale and young shoot, young root absorption, inhibition and destruction seed cell.

After product of the present invention " grass is exhausted " is manufactured experimently from the laboratory, nearly 30,000 mu of the area of demonstrating at present.The exhausted popularizing area of grass had reached 2,000,000 mu in 93 years, user distribution in Guangxi, Guangdong, Hunan, Hubei, Fujian, Jiangsu, Shanghai, Hainan, Sichuan, Jilin etc. economize (district), from the letter trouble of various places feedback, market prospects are considerable.Because use the exhausted rice field of grass, not only herbicidal effect is good, and seedlings of cereal crops growing way is luxuriant, and the effect of increasing production of economic benefit and paddy rice is all more satisfactory.

Through the Hunan, the test in 2 years in two places, Guangdong, the result shows, with the exhausted WP of 18% grass, when dosage is 10 gram/mus, to the preventive effects of following weeds is respectively: the careless 85-98% of barnyard grass, cyperus＞95%, Monochoria vaginalis 80-100%, mexicana about 95%.Total sees, under this dosage, can reach 90% to the preventive effect of general weeds in paddy field, with the herbicidal effect basically identical of 10% Nongdeshi WP15 gram/mu and 50% butachlor EC100ml/ mu; Comparatively speaking, under the above-mentioned dosage, the effect that the three removes barnyard grass is: butachlor 〉=grass is exhausted＞farming and the time, the effect of removing width weed is: Nongdeshi 〉=grass extremely＞butachlor.

When the exhausted consumption of grass was 15 gram/mus, its product fruit to various weeds was also quite improved, and total herbicidal effect can reach 90-98%.This and the result of the court's large tracts of land weeding demonstration: the result of barnyard grass grass 96.6%, cyperus 100%, Monochoria vaginalis 99%, Sagittaria pygmaea 90%, other single, double cotyledon weeds＞95% is consistent.

In sum, when the exhausted WP of 18% grass recommends to south China Dao Qu with the dosage of 15 gram/bags/mu, can reach the one-time weeding purpose fully.Grass is exhausted to be compared with other modern herbicides for use in paddy as a kind of super-high-efficient weed killer herbicide, no matter in safety, and broad spectrum activity, still at aspects such as herbicidal effect, economy, it all is comparatively desirable kind.

Products of the present invention " grass is exhausted " etc. are to the preventive effect (40 days, %, academy of agricultural sciences, Hunan) of main weeds in paddy field

Handle (consumption/mu)	Classification	The barnyard grass grass	Cyperus	Monochoria vaginalis	Mexicana etc.	Total preventive effect	Rate of growth
								The exhausted WP10 gram of 18% grass	Evening	88.9	100	78.4	94.3	87.0	10.8
Early	85.3	96.6	84.1	95.2	92.1	12.8
							The exhausted WP10 gram of 18% grass		Evening	90.9	100	94.2	100	97.4	21.8
Early	92.9	100	99.0	98.2	98.0	18.9
								The exhausted WP20 gram of 18% grass	Evening	100	100	97.3	100	98.9	23.7
Early	94.8	100	98.5	100	99.2	16.1
							10% Nongdeshi WP15 gram		Evening	81.5	100	97.1	100	95.0	16.5
Early	48.2	100	99.5	98.2	93.9	12.5
								50% butachlor EC100 milliliter	Evening	98.2	100	79.8	94.9	89.8	15.4
Early	96.7	100	66.2	100	92.8	10.2
							OK**		Evening	72.0	17.0	138.7	117.3	345	310
Early	38.7	20.7	84	266.7	410.1	308.8

Annotate: evening: in July, 1992-November, early: the 4-7 month in 1993.* CK, a hurdle weeds class is strain/m ², rate of growth is a specific yield, kilogram/mu." grass exhausted " etc. is to the preventive effect (40 days, %, academy of agricultural sciences, Guangdong) of main weeds in paddy field

Handle (dosage/mu)	Classification	The barnyard grass grass	Cyperus	Monochoria vaginalis	Other	Total preventive effect	Rate of growth
								The exhausted WP10 gram of 18% grass	Evening	98.2	100	100	59.3	92.8	4.1
Early	92.9	100	80.0	52.5	75.0	/
							The exhausted WP15 gram of 18% grass		Evening	96.4	100	100	73.3	94.2	5.3
Early	100	100	96.7	67.5	88.3	/
								The exhausted WP20 gram of 18% grass	Evening	96.4	100	100	88.3	96.6	6.6
Early	92.9	100	98.3	80.0	92.2	/
							10% Nongdeshi WP15 gram		Evening	70.9	100	100	79.8	84.1	4.1
Early	50.0	100	96.7	70.0	83.6	/
								50% butachlor WP15 gram	Evening	98.2	100	100	56.1	92.2	7.5
Early	100	100	55	40.0	60.2	/
							CK		Evening	55	44	77	20	126	403.5
Early	42	42	180	120	384	/

Annotate: be mainly dicotyledonous class weeds.Test period is 1993.

Product of the present invention was transferred to academy of agricultural sciences, Liaoning Province test (rice field) in 1993

Treatment region (gram/mu)		The barnyard grass grass		Fescue		Bur beggar-ticks		Monochoria vaginalis		Pondweed		Triangular any of several broadleaf plants grass
														Stubble	Preventive effect (%)	Topped	Preventive effect (%)	Stubble	Preventive effect (%)	Stubble	Preventive effect (%)	Stubble	Preventive effect (%)	Stubble	Preventive effect (%)
		Grass is exhausted	15	6.0	94.7	2.8	88.8	0.66	60.2	1.66	37.6	5.0	74.1													4.3	/
20	4.7													95.8	2.5	90.0	0.33	80.1	1.00	63.0	7.3	62.2	0.0	100
			30	6.3	94.4	1.8	92.8	0.33	80.1	0.66	74.1	2.3	88.1												0.0	100
Fourth farming emulsion (ml/ mu)	175													4.7	95.8	1.6	93.6	0.33	80.1	0.33	88.5	4.7	75.6	0.0			100
		Artificial weeding		41.0	63.6	18.3	26.8	0.0	100	1.33	51.9	11.3	41.5												0.0	100
CK														113	/	25.0	/	1.66	/	2.66	/	19.3	/	0.33			/

Academy of agricultural sciences, Hainan Province in 1993 does rice field test with product of the present invention, and with data announces on the Hainan Island agricultural science of 1993 the 2nd phases:

Dispenser period	Handle	Broadleaf weed		Monocotyledon weed		Total weeds		The poisoning situation
									Strain number (strain)	Preventive effect %	Strain number (strain)	Preventive effect %	Strain number (strain)	Anti-number %
		Dispenser before the rice transplanting	The exhausted wetting powder 15 gram/mus of 18% grass	3	99.4	0	100								3	99.2	Do not have
100 milliliters/mu of 50% butachlor ecs	18							81.3	12	94.8	30	92.8	Do not have
			Blank	186	/	231	/							417	/	Do not have
Dispenser after the rice transplanting	The exhausted wetting powder 15 gram/mus of 18% grass							2	98.3	0	100	2	99.6				Do not have
		100 milliliters/mu of 50% butachlor ecs	69	90.3	10	95.9	79							87.1	Do not have
	Blank							369	/	244	/	613	/			Do not have

Institute of Plant Protection, academy of agricultural sciences, Hunan Province was used for the rice field with product of the present invention in 1993 and tests

Handle	The barnyard grass grass		Monochoria vaginalis		Mexicana		Difformed galingale herb
									Strain/m 2	Preventive effect (%)	Strain/m 2	Preventive effect (%)	Strain/m 2	Preventive effect (%)	Strain/m 2	Preventive effect (%)
	CK	38.7		84.0		266.7		20.7
Grass exhausted 10									11.3	70.8	37.3	55.6	12.7	95.2	0.7	96.6
	Grass exhausted 15	7.3	81.1	16.0	81.0	4.7	98.2	0									100
Grass exhausted 20									6.0	84.5	12.0	85.7	0	100	0	100
	Butachlor 100	1.3	96.6	52.0	38.1	0	100	0									100

Behind academy of agricultural sciences, the Guangdong Province advance copy invention product, think that this product " grass is exhausted " has following characteristics:

1, herbicidal effect: no matter total in barnyard grass grass or grass, " careless exhausted " each processing (mu is executed 10 Ke-Ke 18%WP) and composition A20%WP25 gram/mu, all have efficiently, similar to the drug effect of butachlor 50%EC100 milliliter/mu.30 days investigation behind the medicine, the effect of management of weeds reaches 96.3-99.1%; 45 days investigation behind the medicine, its drug effect still has about 90%.10% composition B or CWP15 gram/mu and 10% composition D or EWP2 gram/mu, effect is also more satisfactory.

2, kill the grass spectrum: " grass is exhausted " is wider than butachlor, it is except having the special efficacy barnyard grass grass, Monochoria vaginalis, difformed galingale herb, and the preventive effect of short arrowhead also is better than butachlor.

3, effective dose: " careless exhausted " mu is executed the existing good preventive effect of 18%WP10 gram (0.15kg/la), and popularization dosage executes the 18%WP1015 gram with mu or combination A20%WP25 gram gets final product.

4, safety: grow from the seedlings of cereal crops, do not see harmful effect, but from species test, handling 5 (20% combination AWP25 gram/mus) and handling 6 (10% composition B or CWP15 gram/mus) seemingly has certain inhibitory action to plant height, but other economic characters are not then had obvious influence.

5, economy: compare with blank, each treatment region all has effect of increasing production in various degree.Wherein bigger with the amount of increase in production of butachlor with " grass is exhausted " high dose (mu is executed commercially available medicine 20 grams).From species test, volume increase all has certain relation with the effective fringe that constitutes output, real grain number (comprising half real grain) and thousand kernel weight, but because of the factor that influences output is many, so no clear regularity.

Claims (7)

1. paddy field weed-killer composite, it is characterized in that it contains metsulfuron-methyl, grass jinx and be selected from one of them compound of Acetochlor, butachlor, isopropyl methoxalamine, its effective ingredient is: metsulfuron-methyl 0.25-30%, grass jinx 0.1-50%, Acetochlor or butachlor, isopropyl methoxalamine 25-80%, all the other are additive.

2, paddy field weed-killer composite according to claim 1 is characterized in that additive is wetting agent, filler, developer, adhesive, emulsifier.

3,, it is characterized in that wetting agent is alkylbenzenesulfonate, soap, soapberry fruit soak, ionic surfactant according to claim 1 and 2 described paddy field weed-killer composites.

4,, it is characterized in that filler is talcum powder, precipitated calcium carbonate, kaolin, montmorillonite according to claim 1 and 2 described paddy field weed-killer composites.

5,, it is characterized in that developer is iron oxide red, iron oxide yellow and water-soluble good pigment according to claim 1 and 2 described paddy field weed-killer composites.

6,, it is characterized in that adhesive is starch or polyvinyl alcohol according to claim 1 and 2 described paddy field weed-killer composites.

7,, it is characterized in that emulsifier is OP-13, OP-10,0201,1602, farming breast, peaceful breast according to claim 1 and 2 described paddy field weed-killer composites.