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Slow-release pesticide granule and preparation method thereof
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A technology of slow-release pesticides and granules, applied in botany equipment and methods, biocides, fungicides, etc., can solve the problems of unsafety, poor slow-release effect, etc., and achieve a significant effect of slow-release pesticides
Inactive Publication Date: 2019-03-08
BEIJING UNIV OF AGRI +1
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Problems solved by technology
[0006] The first object of the present invention is to provide a slow-release pesticide granule, which solves the problems in the prior art that the slow-release pesticide granule contains a large amount of chemical additives, is unsafe, and has poor slow-release effect. It has the advantages of environmental protection and safety, can effectively prolong the release period of pesticides, and reduce the release amount per unit time, etc.
Method used
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Embodiment 1
[0059] Preparation of pyraclostrobin sustained-release granules.
[0061] 1. Take 1000g of fly ash, Na 2 CO 3 250g was mixed evenly, placed in a muffle furnace, first kept at 500°C for half an hour, and then heated to 800°C for calcination at a constant temperature for 2h. After drying, place in 1.5 mol / L NaOH and mix, react at 70°C for 10 hours, filter, and dry to obtain alkali-modified fly ash for future use.
[0062] 2. Take 400g of dry alkali-modified fly ash, 250g of straw, and 150g of biochar, mix them and grind them through a 70-mesh sieve to obtain a carrier.
[0063] 3. Fully mix pyraclostrobin with the fly ash, straw and biochar obtained in the previous step, and then dry it at 60°C for later use.
[0064] 4. Add 200g of starch to 400g of water, and gelatinize at 80°C for 1 hour.
[0065] 5. Spray the gelatinized starch solution on the mixture obtained in step 3 on the granul...
Embodiment 2
[0068] Preparation of pyraclostrobin sustained-release granules.
[0070] 1. Take 500g of dry alkali-modified fly ash, 200g of straw, and 200g of biochar, mix them and grind them through a 70-mesh sieve to obtain a carrier.
[0071] 2. After fully mixing the pyraclostrobin technical substance with the fly ash, straw and biochar obtained in the previous step, dry it at 60°C for later use.
[0072] 3. Add 80g of starch to 160g of water and gelatinize at 80°C for 1 hour.
[0073] 4. Spray the gelatinized starch solution on the mixture obtained in step 2 on the granulator to make a spherical core layer of 1-10mm, and dry it at 60°C for later use.
[0074] 5. Continue to spray the gelatinized starch solution on the dried core layer on the granulator, add 160g of straw to make a wrapping layer, the thickness of the wrapping layer is 0.2-2mm, and dry at 60°C to obtain.
experiment example 1
[0075] Experimental Example 1: Research on the slow-release effect of slow-release pesticide granules.
[0076] The setting of comparative example: set on the basis of embodiment 1, concrete method is as follows:
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Abstract
The invention relates to the field of slow-release pesticides, and specifically relates to a slow-release pesticide granule and a preparation method thereof. The slow-release pesticide granule comprises a core layer and a cladding layer, wherein the core layer comprises a carrier and pesticide active ingredients; the carrier comprises alkaline modified coal ash, straws and charcoal in the mass ratio of (4 to 5): (2 to 3): (1 to 2); the cladding layer comprises straws. The alkaline modification method comprises the following steps: firstly carrying out high-temperature roasting on the coal ashand a fluxing agent, and then carrying out a heating reaction with an alkaline modifier. The pesticide comprises strobilurinfungicide; and the strobilurinfungicide comprises one or more of pyraoxystrobin, kresoxim-methyl, Azoxystrobin and pyraclostrobin. The slow-release pesticide granule solves the problem that a slow-release pesticide granule contains a large number of chemical additives, unsafe and low in slow-release effect in the prior art, and has the advantages that the slow-release pesticide granule is environmentally-friendly and safe, the release period of the pesticide can be prolonged effectively and the release amount in unit time is reduced.
Description
technical field [0001] The invention relates to the field of slow-release pesticides, in particular to a slow-release pesticide granule and a preparation method thereof. Background technique [0002] Pesticides are a special type of commodity, and most of their original drugs need to be processed into different dosage forms before they can be applied. Therefore, the study of pesticide formulations has always been an extremely important link in the development and application of pesticides. However, the utilization rate of conventional pesticide formulations is low, and there are problems such as rapid release of active ingredients, short duration of drug effects, and serious ecological pollution. In order to solve these problems, people put forward higher scientific requirements for pesticide formulations. As an emerging technology, slow-release pesticide technology can effectively solve the problems of fast release of pesticide active preparations and short effective acti...
Claims
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Application Information
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