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In this paper, pendimethalin, oxyfluorfen and acetochlor in garlic plants, soil and grain residues on dynamics and these three pesticides on Garlic final residue were determined and research. Using a mixed solution of acetone and distilled water extraction, chloroform liquid-liquid distribution, neutral alumina and activated carbon column cleanup, HP-5 capillary column Agilent 6890N gas chromatograph (Agilent GC 6890N), μ-ECD detector respectively dimethyl E pendimethalin, oxyfluorfen and acetochlor in garlic plants, soil and grain residues dynamic, final residue were analyzed by HPLC. Agilent 6890NGC-μ-ECD analysis on the plane measured minimum detectable mass fraction of acetochlor 4 × 10-3 mg / kg, pendimethalin 3 × 10-3 mg / kg, oxyfluorfen 2 × 10-3 mg / kg. Instrument in the set conditions, acetochlor, pendimethalin and oxyfluorfen minimum sample volume peak height of instrument noise three times, the minimum detectable amount was 3.0 × 10-12 g , 2.0 × 10-12 g and 1.5 × 10-12 g. Acetochlor in soil, plants and garlic in average recoveries were 83.9% -118.1% ,87.6-117.6% ,78.5-94 .2% coefficient of variation were 5.4-14.3% 1.6 - 9.0% 3.3 - 5.6% , oxyfluorfen in soil, plants and garlic in average recoveries were 93.4% -109.3% ,75.7-117.2% ,80.2-94 .6% coefficient of variation were 2.5-5.4%, 2.7 to 13.2%, 2.9 -4.5% pendimethalin in soil, plants and garlic in average recoveries were 78.9% -106.8% ,80.7-118.9% ,76.4-86 .4% coefficient of variation were 2.8-5.9%, 4.7 - 15.8 % 2.3 - 3.1%. Garlic spray amyl · oxygen · acetochlor high dose 195 g ai/hm2, 2-year trial results showed that: 2009 acetochlor in the soil digestion curve equation C = 1.0378e-0.0707t, correlation coefficient, r = 0.9141, half-0.78d (Jilin); C = 1.1006e-0.0658t, correlation coefficient r = 0.8513, half-2.32d (Shandong); 2009 pendimethalin in the soil digestion curve equation C = 0.6328e -0.046t, the correlation coefficient r = 0.786, half-4.95d (Jilin); C = 0.7014e-0.0481t, correlation coefficient r = 0.8321, half-0.77d (Shandong); 2009 oxyfluorfen in soil digestion curve equation C = 0.2626e-0.0338t, correlation coefficient r = 0.7945, half-2.42d (Jilin); C = 0.3e-0.0424t, correlation coefficient r = 0.8441, half-0.82d (Shandong); 2009 acetochlor Fresh garlic plants in the digestion curve equation C = 0.0736e-0.0138t, correlation coefficient 0.7991, the half-life t1 / 2 = 24.5d (Jilin); C = 0.0807e-0.0331t, correlation coefficient r = 0.8654, the half-life t1 / 2 = 8.21d (Shandong); 2009 pendimethalin fresh garlic plants in the digestion curve equation C = 0.1163e-0.1054t, correlation coefficient r = 0.4756, the half-life t1 / 2 = 1.4d (Jilin); C = 0.1832e-0.1486t, correlation coefficient r = 0.7982, the half-life t1 / 2 = 0.77d (Shandong); 2009 oxyfluorfen fresh garlic plants in the digestion curve equation C = 0.0113e-0.0959t, correlation coefficient r = 0.8785, the half-life t1 / 2 = 7.5d (Jilin); C = 0.0212e-0.2091t, correlation coefficient r = 0.9556, the half-life t1 / 2 = 2.53d (Shandong); 2010 acetochlor in the soil digestion curve equation C = 1.1584e-0.0774t, correlation coefficient r = 0.9517, half-0.03d (Jilin); C = 1.6463e-0.0794t, correlation coefficient r = 0.9667, half-1.17d (Shandong); 2010 two A E pendimethalin in the soil digestion curve equation C = 0.5845e-0.0464t, correlation coefficient r = 0.8605, half-4.78d (Jilin); C = 0.8743e-0.0683t, correlation coefficient r = 0.9559, half-1.41d (Shandong); 2010 oxyfluorfen in soil digestion curve equation C = 0.2671e-0.0358t, correlation coefficient r = 0.8442, half-5.91d (Jilin); C = 0.337e-0.0401t, the correlation coefficient r = 0.863, half-2.09d (Shandong); 2010 acetochlor fresh garlic plants in the digestion curve equation C = 0.0747e-0.0241t, correlation coefficient r = 0.8672, the half-life t1 / 2 = 10.5d (Jilin) ; C = 0.0837e-0.0199t, correlation coefficient r = 0.8896, the half-life t1 / 2 = 12.32d (Shandong); 2010 pendimethalin fresh garlic plants in the digestion curve equation C = 0.1368e-0.1419t The correlation coefficient r = 0.8299, the half-life t1 / 2 = 0.6d (Jilin); C = 0.2073e-0.1723t, correlation coefficient r = 0.8485, the half-life t1 / 2 = 0.02d (Shandong); 2010 oxyfluorfen Fresh garlic plants in the digestion curve equation C = 0.0167e-0.1554t, correlation coefficient r = 0.936, the half-life t1 / 2 = 2.99d (Jilin); C = 0.0293e-0.2769t, correlation coefficient r = 0.9951, the half-life t1 / 2 = 2.3d (Shandong). The results showed that E · oxygen · EC acetochlor in soil, fresh garlic digestion plants faster digestion process in line with a kinetic equation. Order to evaluate the rate of digestion, E · oxygen · acetochlor EC in garlic and soil are easy digestion pesticides. Measured oxygen · E · acetochlor EC garlic plants and soil in the final residue. 2-year results showed that: 45% of E \u0026 O · acetochlor EC application 1, application rate of 195g ai/hm2, 130 g ai/hm2, garlic harvest grain and soil were lower than the lowest final residue detectable concentration of garlic on the final residue was no significant dose-related increase in residual volume was not significant, no cumulative. Based on the above findings, referring to E · oxygen · acetochlor EC in garlic plants and soil residual degradation dynamics, the proposed 45% oxygen · E · EC on Garlic acetochlor application rate not higher than 130g ai/hm2, MRL values ??were acetochlor 0.05mg/kg, pendimethalin 0.1mg/kg, oxyfluorfen 0.05mg/kg.
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