Abstract: 【Object】 The influence of triazophos deposition on rice leaves were studied by adding wetting agents and thickener in the dilution of triazophos,as well as simulated rainfall after 0, 1, 2, 4, and 8 h of spraying. 【Method】 By means of pesticide residue analysis method, the deposition of triazophos on rice leaves was detected by GC. 【Result】 The results showed that the combination of the wetting agent and thickener could increase the deposition significantly and resist the erosion of rain. The best combination was 0.025% of adjuvant 6501 and 0.02% of adjuvant PAAS in dilution of triazophos. The deposition of the best combination is 77.4 μg•g-1, and it is seven times higher than that of CK treatment. 【Conclusion】 The addition of an appropriate spray adjuvant may decrease the pesticide dosage in equal field control efficacy and can achieve the goal of reducing control cost and environmental pollution.

Key words: triazophos, deposition, wetting agent, thickener, simulated rainfall