阅读说明：本技术 一种含灭草松和2,4-d的除草组合物 (Weeding composition containing bentazone and 2,4-D ) 是由 苏本奇 刘跃群 宋新旺 孙宪哲 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种除草组合物,其中,包括灭草松和2,4-D两种活性成分；所述灭草松和2,4-D以酸及各种盐的形式存在；所述除草组合物剂型可以为可溶液剂、可湿性粉剂、可溶粉剂、可溶粒剂、水分散粒剂、乳油、微乳剂、水乳剂、悬浮乳剂、微囊悬浮剂、可分散油悬浮剂等农药可接受的剂型；本发明的除草组合物具有显著的增效作用,与单剂相比,可以有效提高其防效,可以有效减少活性成分的施用剂量,减少环境污染；将两种不同作用机理的除草活性成分组合使用,可有效降低杂草抗药性的产生,扩大杀草谱；可用适用于阔叶杂草和莎草科杂草的防治,尤其是对田间野慈姑、碎米莎草、异形莎草和扁秆藨草有特效。(The invention discloses a weeding composition, which comprises two active ingredients, namely bentazone and 2, 4-D; the bentazone and the 2,4-D exist in the form of acid and various salts; the dosage form of the weeding composition can be acceptable pesticide dosage forms such as a soluble solution, wettable powder, soluble granules, water dispersible granules, missible oil, microemulsion, emulsion in water, suspension emulsion, microcapsule suspending agent, dispersible oil suspending agent and the like; the weeding composition has obvious synergistic effect, and compared with a single agent, the weeding composition can effectively improve the control effect, effectively reduce the application dosage of active ingredients and reduce the environmental pollution; the two weeding active ingredients with different action mechanisms are combined for use, so that the generation of drug resistance of weeds can be effectively reduced, and the weeding spectrum is expanded; can be used for preventing and treating broad-leaved weeds and sedge weeds, and especially has special effects on field edible tulip, cyperus rotundus, cyperus heterophyllus and scirpus planiculmis.)

1. A herbicidal composition characterized by: comprises bentazone and 2,4-D, wherein the bentazone and the 2,4-D are present in the weeding composition in the form of acid and various salts;

the weight ratio range of the bentazone to the 2,4-D is 1: 100-100: 1 or 1: 50-50: 1;

the weight of the bentazone and the 2,4-D accounts for 5% -90% or 10% -80% of the weeding composition.

2. A herbicidal composition according to claim 1, characterized in that: the weight ratio of the bentazone to the 2,4-D is 1: 20-20: 1.

3. A herbicidal composition according to claim 1, characterized in that: the weight of the bentazone and the 2,4-D accounts for 20-60% of the weight of the weeding composition.

4. A herbicidal composition according to claim 1, characterized in that: the bentazone exists in the form of one or more of bentazone, bentazone dimethyl ammonium salt, bentazone isopropylamine salt, bentazone sodium salt and bentazone potassium salt.

5. A herbicidal composition according to claim 1, characterized in that: the 2,4-D exists in the form of one or more of 2,4-D, 2,4-D dimethyl ammonium salt, 2,4-D isopropyl amine salt, 2,4-D sodium salt and 2,4-D potassium salt.

6. A herbicidal composition according to any one of claims 1 to 5, characterized in that: the weeding composition further comprises an auxiliary agent or a filler, wherein the auxiliary agent or the filler accounts for 0.5-95% of the weeding composition by weight.

7. A herbicidal composition according to claim 6, characterized in that: the specific dosage form of the weeding composition is a solution, wettable powder, soluble granules, water dispersible granules, missible oil, microemulsion, aqueous emulsion, suspension emulsion, microcapsule suspending agent or dispersible oil suspending agent.

Technical Field

The invention relates to the field of pesticide herbicides, in particular to a synergistic weeding composition consisting of two weeding active substances.

Background

Bentazone (Bendazone) is a photosynthesis inhibitor, a selective post-emergence contact herbicide, used for treating the stem and leaf of weeds in the seedling stage and acts through contact with leaves. The herbicide is mainly used for crops such as rice, soybean, peanut, wheat and the like, and is used for preventing and removing broadleaf weeds and cyperaceae weeds, and is ineffective for gramineous weeds. Is safe for crops, and after 6-18 weeks of application, the bentazone can be decomposed by microorganisms in soil. When the bentazone is used in a dry farmland, the bentazone is firstly conducted into chloroplasts through leaf surface penetration to inhibit photosynthesis. When the bentazone is used in a paddy field, the bentazone can permeate through the leaf surface and can be absorbed by the roots and conducted to stem leaves, the photosynthesis and the water metabolism of weeds are strongly hindered, nutrition starvation is caused, and the physiological function is disordered to cause death. Is effective on scirpus ellipticus, cyperus esculentus, cyperus rotundus, cyperus heterotypii, rhizoma alismatis, bodhi feltwort, Iris lactea, monochoria vaginalis, monochoria japonica, Equisetum chinensis, bidens triphylla, herba plantaginis, Scirpus yagara, edible tulip, Equisetum hybridum, cleavers, shepherd's purse, prodenia cordifolia, Xanthium sibiricum, Cyperus rotundus, Acalypha australis, Chenopodium album, amaranthus spinosus, amaranthus retroflexus, Thalathus sinensis, Thalictrum aquilinn, Thalictrum aquilegifolium, purslane and other.

2,4-D, namely 2, 4-dichlorophenoxyacetic acid, is a systemic selective herbicide, is used for treating stems and leaves, and can prevent and remove broadleaf weeds such as quinoa and amaranth and gramineous weeds in the germination period in crop fields such as wheat, rice, corn and sugarcane. Can enter the plant body from roots, stems and leaves, is slowly degraded, and can accumulate a certain concentration, thereby interfering the hormone balance in the plant body, destroying the metabolism of nucleic acid and protein, promoting or inhibiting the growth of certain organs, and leading the stems and leaves of weeds to twist, the stem bases to become thick, the swelling and cracking and the like.

Chemical weeding is the most important weeding mode in agricultural production at present, but in recent years, a large amount of single herbicides are used, so that some weeds have resistance to the herbicide, and the use of the single herbicide is more and more limited. The bentazone is a contact herbicide, has a large single dosage, and is easy to cause incomplete weed control and rebound, so that the use effect is influenced. The 2,4-D is used independently in a large dosage, and easily causes recessive phytotoxicity to crops, thereby causing the yield reduction of the crops.

Disclosure of Invention

The invention aims to provide a synergistic weeding composition, which selects the bentazone and the 2,4-D combination to solve the problems in the prior art. The components in the composition have different action modes, the components have mutual synergism, the dosage of the herbicide is reduced, the drug resistance of weeds can be delayed, and the weeding effect of the composition is obviously higher than that of the composition with the components used independently.

The weeding composition is realized by adopting the following technical scheme:

a weeding composition comprises two active ingredients, namely bentazone and 2,4-D, wherein the weight ratio of the bentazone to the 2,4-D is 1: 100 to 100: 1, preferably 1: 50 to 50: 1, and more preferably 1: 20 to 20: 1.

The weight of the weeding composition, bentazone and the 2,4-D active ingredients accounts for 5% -90%, preferably 10% -80%, and more preferably 20% -60% of the composition.

Further, the bentazone and the 2,4-D are in the form of acid and various salts, such as bentazone, bentazone dimethylammonium salt, bentazone ammonium salt, bentazone isopropylamine salt, bentazone sodium salt, bentazone potassium salt, 2,4-D dimethylammonium salt, 2,4-D ammonium salt, 2,4-D isopropylamine salt, 2,4-D sodium salt and 2,4-D potassium salt.

Furthermore, the weeding composition can also comprise an auxiliary agent or a filler, and the auxiliary agent or the filler accounts for 0.5 to 95 percent of the weight of the composition.

Furthermore, the dosage form of the weeding composition can be a dosage form which is acceptable for pesticides such as a soluble solution, a wettable powder, a soluble granule, a water dispersible granule, an emulsifiable solution, a microemulsion, an aqueous emulsion, a suspending emulsion, a microcapsule suspending agent, a dispersible oil suspending agent and the like, wherein the soluble solution, the soluble powder and the soluble granule are preferred.

Has the advantages that: compared with the prior art, the invention has the following beneficial effects:

(1) the pesticide composition has obvious synergistic effect, and compared with a single agent, the pesticide composition can effectively improve the control effect, effectively reduce the application dosage of active ingredients and reduce the environmental pollution.

(2) The invention combines two weeding active ingredients with different action mechanisms for use, can effectively reduce the generation of drug resistance of weeds and expand the weed control spectrum; can be used for preventing and treating broad-leaved weeds and sedge weeds, and especially has special effects on field edible tulip, cyperus rotundus, cyperus heterophyllus and scirpus planiculmis.

Detailed Description

The following detailed description of specific embodiments of the present invention is provided in conjunction with examples, but it should be understood that the scope of the present invention is not limited to the specific embodiments.