In addition to the investigation on the number,activity and damage of different stages and instars of the beetle,the control effects of 5 biological agents including 1.8％Avermectin,1.2％nicotine-matrine EC,3％hypertonic fenoxycarb,25％methylurea No.3 SC and 50000 IU MG-1 Bacillus thuringiensis were com-pared,the results showed that there were three generations in one year in Minqin,and the control should be carried out in the peak oviposition period of overwintering adults in mid-to-late may or in the second larva period in mid-to-late July.Considering the economic cost and control effect,the above 5 traditional Chinese medicines can be used alternately in practice.The use of 1.2％matrine 2000-fold solution and 3％Fenoxycarb 3000-fold solution is recommended when the hazard degree is high,at lower risk,use 1.8％Avermectin 1,000-fold solution,50 000 IU mg-1 bacillus thuringiensis 1,000-fold solution,or 25％Miyurea 31,000-fold solution.
desert grasslanddiorhabda rybakowibiological control
NETL
NSTL
万方数据
