43 results about "Dicofol" patented technology

The invention belongs to the technical field of agriculture product storage, and particularly relates to a method for storing triennial daffodil bulbs. The method includes the steps of screening the bulbs, soaking the bulbs in a pesticide solution, conserving, drying and storing the bulbs, soaking the bulbs in a pesticide solution composed of a formaldehyde solution, a dicofol emulsifiable concentrate, thiophanate methyl wettable powder and captan wettable powder, and evenly mixing edible fungi waste with domestic sludge in proportion to form paste material as bulb conservation material wrapping base parts and lateral buds of the whole bulbs. Thus, the phenomenon that great soil loss and soil fertility drop are caused when soil is used as the bulb conservation material can be avoided, the phenomenon that the bulbs and the warehouse environment are contaminated by pesticides when a lot of pesticides are sprayed in warehouses can be avoided as well, and the method has remarkable ecological environment protection benefits.

The invention provides a method for controlling red spiders of apple trees. The method comprises the following steps: from March to April, after orchard cleaning in spring, when seedlings of grass emerge, dicofol with the mass fraction of 20% is diluted by 1,000 times with water, the diluent is used for spraying to kill the red spiders coming out of hibernation on the ground and foraging on grass twice, and the time interval of the twice spray-killing is 4-6 days; from the last ten days of May to the first ten days of June, after spring shoots of the apple trees stop growing, dicofol and avermectin pyridaben of which the mass fractions are both 20% are diluted by 1,000 times with water and prepared at the volume ratio of 1:1 to spray-skill larvae, nymphs, adults and eggs of red spiders on leaves of the apple trees twice, and the time interval of the twice spray-killing is 4-6 days. The method is simple and feasible, and achieves the purposes of cost decreasing and effectiveness increasing. Compared with a conventional method, the method provided by the invention has the advantages that the labor amount is reduced by 60%, the chemical cost is reduced by 50-60%, nearly 100% of red spiders are killed, the apple trees can be free from red spider harm in the whole year, and overwintering eggs of the red spiders from the last ten days of August to the first ten days of September are prevented.

The invention discloses a special insecticide special for piercing-sucking mouthpart insects and a preparation method for the insecticide. The insecticide consists of the following components in parts by mass: 20 to 30 parts of dichlorvos, 18 to 21 parts of omethoate, 15 to 17 parts of fenitrothion, 10 to 13 parts of decis, 11 to 12 parts of supracide, 7 to 9 parts of dicofol, 8 to 10 parts of anaphicide, 5 to 7 parts of dithane, 3 to 5 parts of octyl mercaptan, 5 to 8 parts of imidacloprid, 3 to 5 parts of Lvling, 5 to 7 parts of pymetrozine, 1 to 3 parts of java paecilomyces, 2 to 4 parts of beta-cypermethrin and 20 to 30 parts of water. The special insecticide for the piercing-sucking mouthpart insects has good stomach poisoning and contact effects, superstrong uptake and translocation performance and stable, persistent and high efficacy.

The invention discloses a quick detection method of residual quantity of dicofol in tea leaves and a detection kit therefor. The detection method includes the steps of: 1) preparing a plurality of n-hexane solutions of the dicofol with successively different concentrations to obtain standard solutions, thereby obtaining standard color developing solutions with certain color gradient and known content of the dicofol; 2) weighing a proper amount of a tea leaf sample to prepare a sample treatment solution; 3) adding a proper amount of sulfuric acid to the sample treatment solution, centrifuging the sample treatment solution to obtain a supernatant, adding a sodium hydroxide solution and pyridine, uniformly mixing the mixture and heating the mixture in water bath to obtain a colored sample color developing solution; and 4) comparing the colored sample color developing solution with the standard color developing solutions to obtain the content of the dicofol in the tea leaf sample. The method can quickly and easily detect the residual quantity of the dicofol in tea leaves, has high sensitivity and is suitable for unprofessional operators in in-situ quick detection.

The invention discloses a technical method for producing bamboo fungus by tea tree residues. The technical method is characterized by comprising the following steps of: utilizing straws and cow dung as a base material, adding pig manure, duck manure, peanut bran, urea, superphosphate, gypsum powder, calcium superphosphate and biogas liquid, stirring uniformly, spreading on the straw surfaces or soil of a mushroom bed, additionally spraying carbendazim, dicofol, dichlorvos and formalin for disinfection, and sterilization and deinsectization to achieve fast growth and 11kg / m<2> of the yield of the bamboo fungus. The technical method disclosed by the invention has the advantages that the yield is high, the quality is good, the mouthfeel is good, the wastes can be utilized, the effect is fast, the income is large, and the yield and the income are increased for farmers; and the bamboo fungus is produced by utilizing the resource of the tea tree residues, so that large economic benefit and social benefit can be generated, the income of the farmers is increased and the wastes also can become into valuables simultaneously.

The invention relates to a method for determining the residual quantity of dicofol in foods, and concretely relates to a method for determining the residual quantity of dicofol in eel and eel products. The method comprises the following steps: carrying out vortex extraction of dicofol alkalization products through using acetone-petroleum ether (1+1V+V), carrying out rotary evaporation of the obtained extract solution at 40DEG C to near dryness, adding n-hexane for dissolving residues, sulfonating by concentrated sulfuric acid to remove lipid impurities and possible-existence 4,4'-DBP in the extract solution, alkalizing dicofol to 4,4'-DBP by using a 10mol / L potassium hydroxide solution and anhydrous ethanol, and determining with a gas chromatograph provided with a micro-electronic capture detector. An external standard method is used for quantification, and when the addition concentration is 0.01-0.05mg / kg, the recovery rate is in a range of 72.2-118.3%, the relative standard deviation is less than 12.6%, and methodologic indexes satisfy the pesticide residual detection requirement. The determination method solves a problem of the unstable dicofol determination result, and eliminates a severe interference problem of complex matrixes.

The invention discloses a dicofol degrading bacterium and a soil restoration application. The dicofol degrading bacterium provided by the invention is bacterial strain DCF-7 of pseudomonas putida, the bacterium can completely degrade 200mg / L of dicofol in 7days under an aerobic condition, the bacterial strain DCF-7 is sensitive to gentamycin, neomycin and tetracycline, and presents tolerability to 13 types of heavy metals; the dicofol degrading bacterium has the capability for degrading dicofol with high efficiency under actual soil environment, can substantially shorten the timing for degrading dicofol, and has significance and value of practical application.

The invention discloses a detection kit and a method for dicofol. The principle that the activity of lipase can be increased along with the increase of the concentration of the dicofol is utilized; whether the dicofol exists or not is detected by detecting the lipase activity, so that the dosage of an organic solvent is reduced, the detection limit is improved, strong acid and an organic solvent with foul smell are prevented from being used, the operation process is simplified, the detection efficiency is improved, and the method is suitable for field operation and rapid detection.