CN1187298A - Compound herbicide - Google Patents

Abstract

A compound herbicide contains sym-triazine herbicides such as cyanazine, atrazine, terbuthylazine, simanex, etc. and sulfonylurea herbicicides such as thiafensulfuron, DPX-Z9636, etc., and features moderate residual effective period, broad spectrum and low cost.

Description

A kind of compound herbicide

The invention belongs to pesticide field, specifically triazine and sulfonylurea herbicide composition.

Along with China's agricultural development, the extensive use of chemical herbicide, great changes have taken place in original weed community.Main weeds originally becomes less important weeds, and relative less important weeds rise to main weeds, so just requires the manufacturing enterprise of agricultural chemicals to produce and meets the weed killer herbicide that present control of weeds requires.The medicament of Ying Yonging has atrazine, Yu Nongle, gram not to have track etc. in the market, but because all there are some problems in they in application time and medicament price, so need a kind ofly both can handle by cauline leaf especially on the market, again can soil treatment and the low weed killer herbicide of price.

The objective of the invention is to practical problem, proposed a kind of new herbicidal composition at weed killer herbicide supply and demand in the agricultural production of present China.

Below narrate main contents of the present invention:

Compound herbicide of the present invention contains triazine herbicide and sulfonylurea herbicide; Furtherly, compound herbicide of the present invention includes atrazine (atrazine ATRAZINE) and becomes (rimsulfuron DPX--Z9636) with precious; Furtherly, compound herbicide of the present invention includes the atrazine of 1-80% and the treasured of 0.2-90% becomes.The triazine herbicide of indication of the present invention can be bladex, atrazine (atrazine ATRAZINE), Garagard, Ximajin and other triazine herbicide.The sulfonylurea herbicide of indication of the present invention can be thifensulfuron methyl (the precious receipts), precious one-tenth (rimsulfuron DPX--Z9636) and other sulfonylurea herbicide.

Utilize the said weed killer herbicide of the invention described above, be equipped with the known auxiliary agent of those skilled in that art (comprising solvent (filler), synergist etc.), can be made into the compound herbicide of the multiple formulation of the present invention.

The optimum ratio of compound herbicide of the present invention is (percentage by weight):

Atrazine: 1-80%;

Precious one-tenth: 0.2-90%;

Auxiliary agent is OP-10 0,201 0203, farming breast 500 1,600 16,011,602 2,201 0208, any three kind composition: the 1-15%s of neopelex--calcium, sodium lignin sulfonate--among calcium, the SOPA;

Synergist is penetrant t, beneficial agricultural bleeding agent A, B, C, any one compound in the azone: 1-10%;

Filler is any two kinds of compound: the 0.5--50% in CMC, xanthans, white carbon, potter's clay, the diatomite;

Stabilizing agent is any one compound in tributyl phosphate, sodium bicarbonate, the boric acid: 0.1--10%.

Take by weighing each component according to said ratio, can be made into wetting powder through grinding and processing.

The optimum formula of compound herbicide of the present invention is:

Ten dialkyl benzene sulfonic acid sodium salts 2

Sodium lignin sulfonate 3

SOPA 2

Potter's clay 26

Penetrant t 10

White carbon 6

The former powder 49 of atrazine

Precious one-tenth 1

Tributyl phosphate 1

Weed killer herbicide of the present invention has been compared following advantage than prior art:

1, the longevity of residure is moderate.

Solve corn field owing to use single variety to make weed community change for many years, caused herbicide effects to descend and ground such as North China cause drug injury problem to second stubble crop winter wheat because of using long weed killer herbicide of the longevity of residure.

2, broad weed-killing spectrum.

Because the present invention is composite weed killer herbicide, thereby enlarged original grass spectrum of killing, it all has good preventive effect to grass family and broad leaved weed.

3, mu weeding cost reduces.

4, synergistic effect is remarkable: see embodiment 9.

Below narrate embodiments of the invention:

Embodiment 1 embodiment 2 embodiment 3 embodiment 4

Ten dialkyl benzene sulfonic acid sodium salts 2132

Sodium lignin sulfonate 312 0.5

SOPA 2 1 1 0.5

Potter's clay 26 45 1 0.9

Penetrant t 10 551

White carbon 64 0.8 4

The former powder 49 18 80 1 of atrazine

Precious one-tenth 1 20 0.2 90

Tributyl phosphate 157 0.1

Embodiment 5 embodiment 6 embodiment 7 embodiment 8

Ten dialkyl benzene sulfonic acid calcium 2132

Sodium lignin sulfonate 312 0.5

Farming breast 1,600 211 0.5

Diatomite 26 45 1 0.9

Azone 10 551

Xanthans 64 0.8 4

The former powder 49 18 80 1 of atrazine

Precious one-tenth 1 20 0.2 90

Sodium bicarbonate 157 0.1

Take by weighing each amount of substance according to the foregoing description,, can make the wetting powder of different content of the present invention with the method that those skilled in that art know.

Table 1 present composition control corn field of summer assorted leather effect (Shandong) processes behind the medicine behind 14 days total preventive effect seedlings 30 days total preventive effect (mu consumption) total strain numbers of the total strain numbers of weeds (%) weeds (%) medicament 100g 123 82.3 135 84.6 precious one-tenth 4g 345 50.3 373 57.5 atrazine 120g 200 71.2 229 73.9 of the present invention and contrasts 694-877-

Table 2 present composition field efficiency test is handled before the medicine behind the number of weeds seedling 45 days heavy fresh weights of the bright grass of preventive effect rate medicament (strain/m of the present invention that goes down ²) weeds strain number (strain/m ²) (%) (g/m ²) % medicament 100g 97 2 97.9 20 98.750% precious one-tenth 4g 105 34 67.6 512 66.438% atrazines 76 57 25.0 492 67.8CK 114 137-20.2 1526 of the present invention-

Table 3 present composition fresh weight effect (corn) Embodiment 9: compound herbicide synergistic effect research

Atrazine belongs to triazine herbicide, can prevent and kill off broadleaf weed by postemergence application before seedling, simultaneously broadleaf weed is also had certain preventive effect, but this medicine residual life is long, and single administration easily causes down the poisoning of stubble wheat; Precious one-tenth is sulfonylurea herbicide, and efficient to the most of single broadleaf weeds of corn field at postemergence application, this medicine is an inhibitor of acetolactate synthetase, and site of action is single, uses easily separately and develops immunity to drugs.For clear and definite precious one-tenth and atrazine synergy mode, provide scientific basis for rationally using these two kinds of medicaments with, do following experiment:

Material and method

(1) medicament:

25% precious one-tenth dry suspending agent Xuanhua insecticide factory provides

40% atrazine suspending agent Xuanhua insecticide factory produces (two) for the examination weeds: lady's-grass (Digitaria sanguinalis), and a branch amaranth (Amaranthusrottoflexus) were collected in the Beijing area in 96 years.(3) precious one-tenth+atrazine is used the evaluation of pesticide effectiveness and the synergy evaluation to weeds with

Tested in the 9-10 month in 1997 and carry out in the China Agricultural University greenhouse, test establish two single agent different with four to five use proportioning with, each chemicals treatment is established 5 concentration, repeats for 4 times, experimental scheme is that completely random is arranged, with the little plastic cup of diameter 7cm pack into 90 the gram soil, broadcast 50 of Amaranthus retroflexus for every glass, 100 of lady's-grass, seed level 0.5cm, keep ground moistening during whole test, after planting 3 weeks were sprayed medicine, 12 days investigation weeds overground part fresh weights after the dispenser.By the concentration logarithm---the effective dose (ED90) of two single agent and each mixture inhibition Amaranthus retroflexus and lady's-grass growth 90% is obtained in the linear regression of inhibiting rate probit value, simulates ED90 isoeffect curve figure with calculator.(Additive DoseModel ADM) estimates the synergy of using with between each medicament to adopt the dosage additive model.

In the equivalent line chart that draws, the degree size that actual observed value departs from the ADM predicted value can reflect the enhancing of the drug effect that is produced when mixture uses separately with respect to single agent or weaken, and this degree is represented with synergy index K.As illustrated in fig. 1 and 2, K=ON/OM.When＜1, the expression antagonism; When K=1, expression addition, synergy multiple=K-1.

Result and analysis:

1, precious one-tenth and atrazine list activity to lady's-grass and Amaranthus retroflexus

Precious Cheng Danyong is respectively the reaction probit value (y) and dosage logarithm (x) the toxicity regression formula of the Amaranthus retroflexus of lady's-grass and Amaranthus retroflexus

Lady's-grass: y=2.89+0.91x{x=log (dosage), mg/ mu };

Amaranthus retroflexus: y=18.34+4.7x{x=log (dosage x (100), mg/ mu }.

Fig. 1 atrazine and the precious ED90 equivalent line that becomes to do mutually to lady's-grass

Fig. 2 atrazine and the precious ED90 equivalent line that becomes to do mutually to Amaranthus retroflexus

The atrazine list is used the reaction probit value (y) of lady's-grass and Amaranthus retroflexus and dosage logarithm (x) toxicity regression formula is respectively: lady's-grass: y=1.97+1.34x{x=log (dosage), mg/ mu }; Amaranthus retroflexus: y=2.58+0.88x{x=log (dosage x (100), mg/ mu }.

According to top toxicity regression formula, the BD90 that calculates precious lady's-grass in pairs and Amaranthus retroflexus is respectively 5.39 and 1.74g/ mu, atrazine is to the ED90 difference 1659 and the 15.76g/ mu of lady's-grass and Amaranthus retroflexus, this result shows that the post processing of precious one-tenth seedling all has high activity to lady's-grass and Amaranthus retroflexus, and the post processing of atrazine seedling is then very low to the activity of lady's-grass to the active height of Amaranthus retroflexus.

2, the synergy of precious one-tenth and atrazine

Precious one-tenth and atrazine are used with lady's-grass and mutual ED90 equivalent line such as the Fig. 1,2 that does of Amaranthus retroflexus, can find out precious to become and atrazine is used with lady's-grass and Amaranthus retroflexus are all had obvious synergistic effect from Fig. 1,2, atrazine and the precious synergy index K=ON/OM=5.4/3.7=1.46 of lady's-grass in pairs, maximum synergy multiple=K-1=1.46-1=0.46 (Fig. 1), atrazine and the precious synergy index K=ON/OM=5.1/2.7=1.89 of Amaranthus retroflexus in pairs, maximum synergy multiple=K-1=1.89-1=0.89 (Fig. 2).

Atrazine and precious the best of lady's-grass are in pairs used ratio with and are far longer than the best of Amaranthus retroflexus is used with ratio, can find out also that from Fig. 1,2 atrazine becomes to use with in very big proportion with treasured lady's-grass and Amaranthus retroflexus are all had synergistic effect.

The above results shows that precious one-tenth and atrazine are used with all has obvious synergistic effect to grass family and broad leaved weed, and has the mixing ratio of synergistic effect wide.

Claims (7)

1, a kind of compound herbicide is characterized in that containing triazine herbicide and sulfonylurea herbicide.

2, weed killer herbicide according to claim 1 is characterized in that containing atrazine (atrazine ATRAZINE) and becomes (rimsulfuron DPX--Z9636) with treasured.

3, weed killer herbicide according to claim 1 is characterized in that this compound herbicide contains the atrazine of 1-80% and the treasured of 0.2-90% becomes.

4, weed killer herbicide according to claim 1 is characterized in that triazine herbicide can be bladex, atrazine (atrazine ATRAZINE), Garagard, Ximajin and other triazine herbicide.

5, weed killer herbicide according to claim 1 is characterized in that sulfonylurea herbicide can be thifensulfuron methyl (the precious receipts), precious one-tenth (rimsulfuron DPX--Z9636) and other sulfonylurea herbicide.

6, weed killer herbicide according to claim 1, the optimum ratio that it is characterized in that are (percentage by weights):

Atrazine: 1-80%;

Precious one-tenth: 0.2-90%;

Auxiliary agent is OP-10 0,201 0203, farming breast 500 1,600 16,011,602 2,201 0208, any three kind composition: the 1-15%s of neopelex--calcium, sodium lignin sulfonate--among calcium, the SOPA;

Synergist is penetrant t, beneficial agricultural bleeding agent A, B, C, any one compound in the azone: 1-10%;

Filler is any two kinds of compound: the 0.5--50% in CMC, xanthans, white carbon, potter's clay, the diatomite;

Stabilizing agent is any one compound in tributyl phosphate, sodium bicarbonate, the boric acid: 0.1--10%.

7, weed killer herbicide according to claim 1 is characterized in that optimum formula is:

Ten dialkyl benzene sulfonic acid sodium salts 2

Sodium lignin sulfonate 3

SOPA 2

Potter's clay 26

Penetrant t 10

White carbon 6

The former powder 49 of atrazine

Precious one-tenth 1

Tributyl phosphate 1