The invention relates to a water suspension
pesticide containing pymetrozine and
fenobucarb and a preparation method thereof. The rate of the pymetrozine to the
fenobucarb is 1:0.5 to 1:8, and the pymetrozine and the
fenobucarb account for 8% to 40% of the proportion by weight in the formula in total. The water suspension
pesticide also comprises 1% to 10% of dispersing agent, 0.5% to 5% of
wetting agent, 0.1% to 1% of thickener and suspension stabilizer, 1% to 5% of freeze proof agent, 0.1% to 1% of
defoamer and the balance of water and is prepared in the following steps of filling the measured pymetrozine, fenobucarb, dispersing agent,
wetting agent, freeze proof agent and water into a reaction kettle;
cutting for 10 to 40 minutes;
grinding for two to four times by adding the measured
defoamer; adding the measured thicker, and
cutting for 10 to 30 minutes. The
pesticide of the invention overcomes the defects of weak pest defeat performance by independently using the pymetrozine and short effect time of the fenobucarb, and has the advantages of low cost, good effects for killing brown
plant-hoppers and striped rice borers, no
powder dust flying and no environment
pollution.