Preventive Effect of Different Concentrations of Three Kinds of Agents on Notobitus meleagris
To explore the pollution-free prevention method and control of Notobitus meleagris,1% matrine SL (smoke type),1 .2% matrine-nicotine missible oil,and 1 .8% Avermectin missible oil were selected to test the preventive effect on control of the nymph and adult of N.meleagris at Shaxian County,Fujiang province in 2003 . The result showed that,after 3 d of spray matrine and Avermectin missible oil by smoke spray technology,the pre-ventive effect on nymph and adult was more than 80%.In which,the optimum agent dosage for two kinds of ma-trines was 1∶9 ,while 1∶40 was the best dosage for Avermectin missible oil.