Water dispersible granule of thiamethoxam and pymetrozine composite pesticide and preparation method thereof
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A technology of compound pesticide and pymetrozine, applied in the fields of botanical equipment and methods, pesticides, biocides, etc., can solve the problems of easy drift, plant phytotoxicity, uneven spraying, etc., and achieve strong systemic absorption and contact killing. It is easy to industrialize production, and the effect of insecticidal knockdown is fast.
Active Publication Date: 2014-07-09
ANHUI MEILAND AGRI DEV
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Problems solved by technology
For example, wettable powders are likely to cause product sticking, not easy to disperse and suspend in water, or block the nozzle, and cause precipitation in the sprayer, resulting in uneven spraying and local plant injury
When the powder is in use, particles with a diameter of less than 10 microns are likely to drift away due to the influence of ground airflow, waste the dose, and cause environmental pollution and affect people's health
[0008] 3) The problem of compounding. Through the toxicity test, heat storage stability test and the measurement of the mixed co-toxicity coefficient of several specific proportions disclosed by the pesticide composition, it is found that the obvious synergistic effect of the two agents cannot be achieved. Rice planthopper control effect is not satisfactory
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Embodiment 1
[0038] Thiamethoxam Pymetrozine water-dispersible granules, each component and its weight ratio are as follows:
[0039] Element
[0040] Preparation method: Mix thiamethoxam, pymetrozine, additives and fillers evenly, coarsely pulverize in advance, and then perform airflow pulverization or superfine pulverization (the pulverized particle size meets the particle size range controlled by the final product). Add water (in actual production, the amount of water added to meet the moisture requirements controlled by the final product shall prevail) for mixing and granulation. The prepared water-dispersible granules have a water weight percentage of 1.8% and a particle size of 420 μm to 1680 μm.
Embodiment 2
[0042] Thiamethoxam Pymetrozine water-dispersible granules, each component and its weight ratio are as follows:
[0043] Element
[0044] water
[0045] The preparation method is the same as in Example 1, and the prepared water-dispersible granules have a water weight percentage of 1.6% and a particle size of 420 μm to 1680 μm.
Embodiment 3
[0047] Thiamethoxam Pymetrozine water-dispersible granules, each component and its weight ratio are as follows:
[0048] Element
[0049] The preparation method is the same as in Example 1, and the water-dispersible granule prepared has a water weight percentage of 1.8% and a particle size of 420 μm to 1680 μm.
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Abstract
The invention relates to the technical field of pesticide for controlling rice planthoppers, in particular to a water dispersible granule of thiamethoxam and pymetrozine composite pesticide and a preparation method of the water dispersible granule. The water dispersible granule is prepared by the following ingredients in parts by weight: 15 parts of thiamethoxam, 60 parts of pymetrozine, 15 parts of assistant, 10 parts of filling and less than 5 parts of water. The water dispersible granule of the thiamethoxam and pymetrozine composite pesticide is obviously superior to products prepared according to other proportions in wetting time, suspensibility, persistent foamability, thermal stability and the like. Experiments verify that a cotoxicity coefficient reaches 200.2, and the granule falls in an obvious synergistic action scope. Prepared water dispersible granule insecticide has better systematic and contact actions, damages a normal nervous system of an insect, kills the insect relatively quickly, is longer in lasting period, and has a good effect of controlling the rice planthoppers. The granule is safe to flowers, and free from hazards, and basically has no influence on beneficial organisms such as natural enemies.
Description
technical field [0001] The invention relates to the technical field of pesticides for preventing and controlling rice planthoppers, in particular to a water-dispersible granule of a composite pesticide of thiamethoxam and pymetrozine and a preparation method thereof. Background technique [0002] Thiamethoxam, Chinese common name Actai, chemical name 3-(2-chloro-1,3-thiazol-5-ylmethyl)-5-methyl-1,3,5-oxadiazine-4 -Basic fork (nitro) amine is an insecticide with high efficiency and low toxicity, which can effectively control Lepidoptera, Coleoptera, and Thysanoptera pests, such as various aphids, leafhoppers, whiteflies, planthoppers, etc. Prevention and control are not easy to produce drug resistance, and belong to environmentally friendly insecticides. [0003] Pymetrozine, whose chemical name is (E)-4,5-dihydro-6-methyl-4-(3-pyridinemethyleneamino)-1,2,4-triazine-3(2H)- Ketones can effectively control aphids, planthoppers, whiteflies, leafhoppers and other pests, such as...
Claims
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