CN1061215C

CN1061215C - Compound herbicide for paddy field

Info

Publication number: CN1061215C
Application number: CN98114592A
Authority: CN
Inventors: 吴应多
Original assignee: Individual
Current assignee: Wu Yingduo
Priority date: 1998-06-20
Filing date: 1998-06-20
Publication date: 2001-01-31
Anticipated expiration: 2018-06-20
Also published as: CN1203025A

Abstract

The present invention relates to a composite weed killer for rice fields. The present invention is demanded to have the advantages of broad weeding spectrum, good weeding effect, safe use for rice and low cost. The main components are pretilachlor and bensulfuron-methyl, and the weight ratio of the effective components of the mixed two components is (6 to 24): 1.The components also comprise fenclorim, naphthalene sulfonic acid sodium salt formaldehyde condensation product, sodium dodecyl sulfate, 885 auxiliary agent, para-methoxy-fatty-amido-benzene-sulfonic-acid-sodium salt, white carbon black and light calcium carbonate. The present invention is especially suitable for the popularization and use in rice light-duty cultivation fields such as seedling fields, direct seeding fields, seedling throwing fields, etc. which have the characteristics of various weeds, early germination, long period of emergence and great generating capacity.

Description

The composite herbicide that is used for the rice field

The invention belongs to chemical pesticide, be specifically related to the weed killer herbicide of paddy field.

Now mainly contain two kinds with weed killer herbicide: a kind of to be that effective ingredient is that the third careless amine adds the safener fenclorim formulated; Another kind is a bensulfuron-methyl.

Third careless amine (Pretilachlor) molecular formula is C ₁₇H ₂₄CLHO ₂, 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

The third careless amine belongs to the preceding selective herbicide of amide-type rice field bud, and medicament absorbs by weeds embryo sheath and mesocotyl, hypocotyl, directly disturbs weeds body internal protein synthetic, and influence photosynthesis and respiration, make the weeds primary leaf be difficult to elongation, the seedling distortion, dark green leaf color, growth stops.Paddy rice has stronger capacity of decomposition to the third careless amine, but the capacity of decomposition of rice bud is relatively poor, for early stage dispenser, adds safener " fenclorim " (CGA123407) in the third careless amine, improves the safety of medicament to paddy rice bud paddy and seedling.Can prevent and kill off paddy field barnyard grass grass, moleplant seed, difformed galingale herb, cyperus iria, flat bar sugarcane grass, needle spikesedge herb, miliary fimbristylis herb, firefly Lin, Monochoria vaginalis, mexicana, Procumbent Falsepimpernel, false loosestrife, carp intestines, but relatively poor to effects such as water peanut, convexutricle sedge herb, four leaf duckweeds, oenanthe stolonifera, short arrowheads.Bensulfuron-methyl 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 the division and the growth of cell, but as safe as a house to paddy rice, be suitable for different soil properties, all kinds paddy field weeding.Early time treatment before bud or behind the bud, annual and most perennial broadleaf weeds and sedge weed all there is good preventive effect, as four leaf duckweeds, pondweed, short arrowhead, Herba Ammanniae Bacciferae, Monochoria vaginalis, mexicana, Procumbent Falsepimpernel, rhizoma alismatis, false harmony dish, difformed galingale herb, cyperus iria, flat bar Fischer grass, needle spikesedge herb, miliary fimbristylis herb, firefly Lin, but to the weak effect of barnyard grass grass, moleplant seed.

On producing, the third careless amine (containing fenclorim) is used for rice seedling bed, the weeding of live field, and bensulfuron-methyl is used for rice seedling bed, transplants land for growing field crops, live field, seedling throwing field, rice seedling bed weeding.Generally speaking, the third careless amine (containing fenclorim) uses separately, is 75-120 gram/mu at the application dosage of rice seedling bed, and cost is a 9.5-15.6 unit.The phonetic sulphur of benzyl falls the independent dosage that uses and is 12-15 gram/mu, cost 1.2-1.5 unit.But as a rule, because malignant weeds such as barnyard grass grass, moleplant seed, four leaf duckweeds, short arrowhead take place simultaneously, the single harm that can not control these weeds with the third careless amine (containing fenclorim) or bensulfuron-methyl, if mixing, use two kinds of medicaments, its dosage is the third careless amine (containing Xie Caoding), 100 gram/mus, bensulfuron-methyl 15 gram/mus, cost per mu needs 14.5, and cost is very high, and the peasant is difficult to accept.

In sum, the problem one of now using the third careless amine (containing fenclorim) and bensulfuron-methyl to exist is that the grass spectrum is wide inadequately extremely, and every kind of weed killer herbicide uses separately, and all some weeds can not remove effectively extremely; One is that the third careless amine production cost is higher, use with by the dosage of independent use with bensulfuron-methyl, though herbicidal effect is better, it is wider to kill the grass spectrum, but cost is still higher, if reduce by the third careless amine using dosage, then herbicidal effect descends, add that peasant household's dosage when using operation with is difficult for grasping, thereby be difficult to apply in the rural area.

The present invention seeks to shortcoming, a kind of Compositional type herbicides for use in paddy be provided at prior art, can enlarge kill the grass spectrum, herbicidal effect is good, safe in utilization and can effectively reduce production costs.

For achieving the above object, through test in a large number, obtained the prescription of this weed killer herbicide.Its centre point is with the bensulfuron-methyl complex preparation with the third careless amine.The two effective ingredient weight ratio is 6-24: 1.Except that above two kinds of Main Ingredients and Appearances, also contain fenclorim, as the naphthalenesulfonic acid-formaldehyde condensate of dispersant, as the lauryl sodium sulfate of wetting agent, as 885 auxiliary agents of surfactant with to methoxyl group fatty acyl amido benzene sulfonic acid sodium salt, as the white carbon (hydration calcium dioxide) and the filler precipitated calcium carbonate of carrier as safener.

The weight ratio of the third careless amine and fenclorim is 3: 1

Advantage of the present invention and remarkable result:

1. herbicidal effect is splendid, to the preventive effects of weeds such as barnyard grass grass, needle spikesedge herb and four Ye Ping all greater than 85%;

2. safe:

Do not show to paddy rice generation damage symptom, even when recommending the double high dose of consumption to handle, be safe through China Paddy Rice Inst's result of the test paddy rice yet.

3. it is wider to kill the grass spectrum:

Single agent third careless amine (containing fenclorim) can not effectively be prevented and kill off four leaf duckweeds, short arrowhead, and single agent bensulfuron-methyl can not effectively be prevented and kill off barnyard grass grass, moleplant seed.And the complex preparation of the third grass peace (containing fenclorim) and bensulfuron-methyl remedies the defective that careless spectrum aspect is killed in each leisure mutually, kill the grass spectrum thereby improved greatly, be enough to effectively prevent and kill off the most of weeds in rice seedling bed, live field and the seedling throwing field, particularly difficult moleplant seed, the short arrowhead of preventing and kill off of other medicament had good preventive effect.

4. cost descends, remarkable in economical benefits:

Owing to have significant synergies after the third careless amine (containing fenclorim) and bensulfuron-methyl are composite, thereby can reduce the using dosage of the third careless amine (containing fenclorim), and be 48 gram/mus, bensulfuron-methyl 16 gram/mus, cost per mu only needs 7.84 yuan, thereby has significantly reduced the weeding cost.

5. reduce the medication number of times, reduce environmental pollution:

The third careless amine (containing fenclorim) and bensulfuron-methyl complex preparation be broad weed-killing spectrum not only, and lasting medicine, a drug can be controlled nursery period overall process weeds substantially, compares with the third careless amine (containing fenclorim) or bensulfuron-methyl with single, can reduce the medication number of times, reduce environmental pollution.

6. be specially adapted to rice seedling bed and light cultivation paddy field:

In recent years, the technical development of paddy rice light cultivation is very fast, comprises live field and seedling throwing field.But at present not only also seldom to rice safety, herbicidal effect but also good, as to be applicable to light cultivation paddy field weed killer herbicide.And complex preparation of the present invention be specially adapted to the weeds kind many, sprout morning, the rice seedling bed that the seeding stage is long, generating capacity is big, live field and seedling throwing field, in rice seedling bed and paddy rice light cultivation, all have broad prospect for its application.

Accompanying drawing is represented the relation of the long inhibiting rate of root of the of the present invention third careless amine (containing fenclorim) and bensulfuron-methyl different proportion and no awns barnyard grass.Wherein ordinate represents not have the long inhibiting rate of awns barnyard grass root (%), and abscissa is the different proportion of the third careless amine (containing fenclorim) and bensulfuron-methyl, wherein the 1 corresponding third careless amine: bensulfuron-methyl is 0: 1; 2 correspondences 0.25: 0.75; 3 correspondences 0.5: 0.5; 4 correspondences 0.75: 0.5; 5 correspondences 1: 0.

The present invention program's embodiment:

The embodiment of each component weight content percentage of the present invention is:

The third careless amine accounts for 36%, bensulfuron-methyl 4%, fenclorim 12.0%, naphthalenesulfonic acid-formaldehyde condensate 5%, lauryl sodium sulfate 0.5%, 885 auxiliary agents 2%, methoxyl group fatty acyl amido benzene sulfonic acid sodium salt 4%, white carbon 25-30%, precipitated calcium carbonate are supplied 100%.

Effective ingredient using dosage scope (gram/hectare is got by unit): the third careless amine (containing fenclorim) is 189-432; Bensulfuron-methyl is 21.6-43.2.

Embodiment is as follows:

The third careless amine bensulfuron-methyl

1 189 24

2 216 24

3 270 24

4 297 24

5 324 24

Formulation of the present invention adopts wetting powder.

Claims

1. the composite herbicide that is used for the rice field, the fenclorim that it is characterized in that including the third careless amine and bensulfuron-methyl and be used as safener, wherein the weight ratio of the third careless amine and bensulfuron-methyl is 6-15: the weight ratio of 1, the third careless amine and fenclorim is 3: 1.

2. by the described weed killer herbicide of claim 1, it is characterized in that also containing naphthalenesulfonic acid-formaldehyde condensate, as the lauryl sodium sulfate of wetting agent, as 885 auxiliary agents of surfactant with to methoxyl group fatty acyl amido benzene sulfonic acid sodium salt, as the white carbon of carrier, and filler precipitated calcium carbonate as dispersant.

3. by claim 1 or 2 described weed killer herbicides, it is characterized in that the percetage by weight of each component is: the third careless amine 36%, bensulfuron-methyl 4%, fenclorim 12%, naphthalenesulfonic acid-formaldehyde condensate 5%, lauryl sodium sulfate 0.5%, 885 auxiliary agents 2%, methoxyl group fatty acyl amido benzene sulfonic acid sodium salt 4%, white carbon 25-30%, precipitated calcium carbonate are supplied 100%.

4. by claim 1 or 2 described weed killer herbicides, it is characterized in that formulation adopts wetting powder.