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《Heilongjiang Agricultural Sciences》 2017-10
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Effect of Spray Date of Fungicide on Control of Early Blight and Yield of Potato

TAI Lian-mei;GUO Yong-xia;ZHANG Zong-min;JIN Yong-ling;JIN Xue-hui;JIN Guang-hui;College of Agronomy,Heilongjiang Bayi Agricultural University;Keshan Farm;  
In order to realize saving and improving efficiency of chemical pesticides for potato early blight,the field experiments were carried out to study fungicide spray date and times on the control of potato early blight and its effect on potato yield.The results showed that early blight could be adequately controlled with two or three spays of the mixtures of mancozeb and Azoxystrobin if the initial application was a week before disease onset or was initial stage of disease onset,and four spays of fungicide were not significantly different in controlling the disease than were two or three times applications properly timed,and that there was low control effect of early blight with late fungicide application.Yelds,which were three spays properly timed,were higher than other treatments and increase income were also higher.
【Fund】: 黑龙江省农垦总局资助项目(HNK135ZD-02-16 HNK135-02-08-04)
【CateGory Index】: S435.32
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