Experiment on the effect of seed potato disinfection by chemical fungicide on potato main disease

doi:10.14088/j.cnki.issn0439-8114.2019.16.015

Abstract

Abstract: By the method of dipping sterilization of pre-sowing seed potato tubers, the effects of 8 chemical fungicides on potato early blight, late blight and scab were researched in the dry farmland and rotation paddy-upland crop field. The results suggested that the control effects of 500 g/L fluazinam suspension agent and 50% dimethomorph wettable powder on potato blight were better than others, which was higher than 80% in dry farmland. Besides that, the control effects of 500 g/L fluazinam suspension agent was relative better than others in the rotation paddy-upland crop field, which was 60.3%; The control effects of 500 g/L fluazinam suspension agent and 75% chlorothalonil water dispersible granule were better than other fungicides on potato scab,which were higher than 80% in dry farmland. Besides that, the effects of 75% chlorothalonil water dispersible granule and 80% mancozeb wettable powder were relative better than other funigicides and the effects were higher than 60%; The effects of dipping sterilization of seed potato tubers with 8 fungicides on potato late blight were not good. The overall effects of every fungicides on 3 main potato diseases were higher in dry farmland than in the rotation paddy-upland crop field.

Key words: potato diseases, chemical fungicides, seed potato treatment, field effect

CLC Number:

S432.4

XU Xue-liang, LIU Zi-rong, YAO Ying-juan, ZENG Shao-min, HUANG Yan-zhang, LIU Xiao-juan, FAN Hui-yun, WANG Fen-shan. Experiment on the effect of seed potato disinfection by chemical fungicide on potato main disease[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(16): 66-70.

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