The control effect of Spinetoram+Methoxyfenozide 34％SC on rice-stem borer in paddy fields in Panjin and its safety to rice were studied.The results of field experiment showed that Spinetoram+Methoxyfenozide 34％SC was 24 g/667 m2 and 20 g/667 m2,which was applied for the first time at the peak period of egg hatching,that is,at the initial stage of every generation of rice-stem borer larvae,and applied twice at an interval of 7-10 days.The control effects on the first generation of rice-stem borer were 94.6％and 88.2％,and on the second generation of rice-stem borer were 86.4％and 84.7％,respectively.The control effects of Spinetoram 25％WG and 240 g/L Methoxyfenozide 240 g/L SC on the first generation of rice-stem borer were 97.8％and 78.5％,respectively,when the field dosage was 15 g/667 m2 and 28 g/667 m2 respectively;The control effects on the second generation rice-stem borer were 89.8％and 69.5％,respectively.Rice grew normally in the tested chemical treatment area.To sum up,Spinetoram+Methoxyfenozide 34％SC has ideal control effect on rice-stem borer and is safe for rice.
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