Screening of chemicals for control of verticillium wilt of Cotinus coggygria and the effect of adjuvant
To screen out more suitable systemic chemicals for the prevention and control of verticillium wilt of Cotinus coggygria and explore the synergistic effect of Rouzhitong,a highly efficient fat-soluble penetrant,on the chemical control of verticillium wilt,six kinds of systemic fungicides were selected for indoor antifungal and virulence tests,the control experiments of verticillium wilt of C.coggygria potted seedlings were carried out by adding the adjuvant Rouzhitong to chemicals.The results showed that all six systemic fungicides had a good antifungal effect on Verticillium dahliae,pathogen of verticillium wilt of C.coggygria,median lethal concentration of hymexazol 30%AS,xinjunan acetate 1.2%AS and thiophanate-methyl 70%WP were 0.030,0.043,0.309 g/mL,respectively.The relative control effect of hymexazol 30%AS 100 times dilution mixed with equivalent volume of Rouzhitong 16%EC 200 times dilution on verticillium wilt of C.coggygria potted seedlings reached 75.96%,while the relative control effect of fungicides without adding adjuvant was no more than 28.92%.The synergistic effect of adjuvant on the chemical control of verticillium wilt of C.coggygria was evident.
verticillium wilt of Cotinus coggygriasystemic chemicalRouzhitongcontrol effect
国家科技期刊平台
NSTL
万方数据
维普
