Abstract
Diseases are the main factor to decrease white lupin seed yield. Epiphytotic development of Fusarium occurs at lupin bud formation and flowering stagesunder soil drought conditions. Grey and white mold infect pods at high rain level in the second half of vegetation. The fungi disease anthracnose is the most harmful for lupin crops. Actual fungicides are necessary to protect white lupin crops; they have to be as well protective as to have cure action against disease’s complex without negative action for plants. The fungicide Vento (cresoxim-methyl 125 g/l + tebuconasol 140 g/l + epoxiconasol 116 g/l) at dose 1.0 l/ha has high effectiveness against anthracnose agent under laboratory and field conditions. The effectiveness of this dose against the disease was 94.1% under field conditions. At favorable conditions for disease development two treatments with the fungicide Vento decreases disease spreading and harmfulness for white lupin crops. At high level this fungicide protects white lupin plants against Fusarium and its pods against white and grey moldwhich significantly decreases seed yield losses. Thanks to the fungicide Vento saved yield made 1.95 t/ha during the experimental years. Costs’ payback for the fungicide’s use was 4.43 rubles per each invested one.
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