89 results about "Propoxur" patented technology

The invention discloses herbicide effervescent tablets containing halosulfuronmethyl and pretilachlor and a preparation method thereof. The active ingredients of the herbicide effervescent tablets comprise 0.5 to 5 weight percent of halosulfuronmethyl, 10 to 25 percent of pretilachlor and the balance of an assistant. The effervescent tablets can be prepared by a direct dry-process tabletting method or a method of wet-process granulating first and then tabletting; the direct dry-process tabletting method comprises mechanically grinding the assistant, uniformly mixing with the assistant and directly tabletting the two raw material medicines; and the method of wet-process granulating first and then tabletting comprises drying the two raw material medicines and the ground assistant, mixing, adhering, granulating to prepare an acid soft material and an alkaline soft material and tabletting. The prepared effervescent tablets are new herbicide preparation products which are environment-friendly and convenient to use. The herbicide effervescent tablets can effectively prevent and control various weeds such as weed from broad leave family, grass family, cyperaceae family and the like in rice shooting fields and transplanting fields.

The invention discloses a comprehensive herbicide for rice paddy fields. Effective constituents are fenpyroxim and pretilachlor or mefenacet, the weight percentage of the fenpyroxim to the pretilachlor or the mefenacet is between 1 to 1 and 1 to 20, and the preferred weigh ratio is between 1 to 2 and 1 to 10. A herbicide composition can effectively prevent and kill grassy weeds in the rice paddy fields such as barnyard grasses, semen euphorbiae lathyridis and so on at one time, and can also control broad leaved weeds such as rotala indica, Eleocharis acicularis and so on.

A durable insecticide contains natural plant extract and pyrethrin compound containing cypermethrin, permethrin, propoxur, and the extracts of oleander, castor leaf, etc. Its advantages are high durability (6 months), broad spectrum (mosquito, fly, ant, etc), high effect, and low resistance of pests.

The invention discloses a micro-capsule suspending agent of pretilachlor and a preparation method of the micro-capsule suspending agent. The preparation method includes the steps that a first material and a buffer solution are mixed to be uniform so that the pH value can be regulated to 4 to 7, and a second material is obtained; the second material and an acid pH value regulator are mixed to be uniform so that the pH value can be regulated to 3 to 4, and a third material is obtained; solidification and condensation polymerization are conducted on the third material, and the pH value is regulated; and a solidification and condensation polymerization product subjected to pH regulation and a dispersing agent are mixed to be uniform, and a fourth material is obtained. The micro-capsule suspending agent, obtained according to the disclosed preparation method, of the pretilachlor is stable to store, the agglomeration and solidification phenomena are not likely to be generated, the lasting period is long, and weed in rice fields can be effectively prevented and treated.

The invention relates to a herbicidal composition containing propyrisulfuron, pretilachlor and penoxsulam, which comprises the active ingredients of propyrisulfuron, pretilachlor and penoxsulam. The herbicidal composition provided by the invention has synergy against weeds in a paddy field, can expand a single dose weed control spectrum and reduce the risk of weed resistance, and is suitable for controlling the annual weeds in the paddy rice.

The invention relates to a biochemical synergistic weed killer composition. The biochemical synergistic weed killer composition comprises effective constituents, auxiliaries and fillers. The effective constituents include sclerotium rolfsii and pretilachlor. The biochemical synergistic weed killer composition has the advantages that the two effective constituents, namely, the sclerotium rolfsii and the pretilachlor, are used with each other, accordingly, the biological weed killing performance of the sclerotium rolfsii which is a novel biological weed killer can be brought into play, fast-acting properties of the pretilachlor which is a chemical weed killer can be embodied, and weed killing effects can be improved; the most obvious synergistic effects can be realized by the sclerotium rolfsii and pretilachlor composition for preventing and killing diversified broad-leaf weeds and nutgrass flatsedge of dry and direct-seeded paddy rice; the service cost of the biochemical synergistic weed killer composition can be reduced, problems of high single-dosage service costs and poor low-dosage individual service effects of the sclerotium rolfsii and the pretilachlor at present can be solved, accordingly, prevention effects can be improved when the sclerotium rolfsii and the pretilachlor are used with each other, and the agricultural cost can be reduced.

The invention relates to a weeding composition, and a preparation method and application thereof. The weeding composition is capable of reducing the use amount of single-item weedicide and delaying target weed resistance and is wide in phytocidal range. The weeding composition is composed of pretilachlor, oxadiazon and an additive. The preparation method comprises the following steps of: 1, weighing the pretilachlor and the oxadiazon according to the weight ratio of (20-70):(15-50), then putting the pretilachlor and the oxadiazon into a high-shear emulsifying kettle, and putting the additive into the high-shear emulsifying kettle to shear so as to obtain a mixture; and 2, grinding the mixture through a sand mill, and pumping the mixture into a finished product storage tank, so that preparation of the weeding composition is completed. The weeding composition is used for preventing and weeding annular gramineous weeds, broad leaf weeds and Cyperaceae weeds in rice transplanting fields. The weeding composition disclosed by the invention is capable of reducing the use amount of the single-item weedicide and delaying the target weed resistance, is wide in phytocidal range and safe to crops and environment, and is used in the field of chemical weeding.