Control Efficiency Analysis of Plant Source Pesticides on Castanopsis fissarehd Leaf Eating Pest

A representative standard plot of Castanopsis fissarehd forest in Shaxian County was selected in 2014, and applied different plant source pesticides on Castanopsis fissarehd forest to test the control efficiency of leaf eating pest. Of them, application method of 1.2% nicotine, 5% eucalyptol solution, 1% soluble matrine was applying smoke spraying technology, and different dosage of 11% matrine powder was applying dusting technology to prevention of Cnidocampa flavescens, Phalera assimilis, Thosea sinensis, Latoia consocia, Porthesia similis moth larvae. The results showed that: administration for 3 d, control efficiency of 4 kinds of chemical could reach more than 90%, of which 2 kinds of matrine type with 1∶9 was the control optimal concentration. For 5% eucalyptol solution, control efficiency of the concentration of 1∶50 was the best. The dosage of 11% matrine powder production with 225kg/hm2 was the optimal amount for forest. Therefore, the all tested 4 reagents could be as Castanopsis fissarehd pollutionfree control agent.