Modulation of fungicide dose applied at flag leaf stage to control foliar diseases on winter barley in Belgium
1994
Meeus, P. (Centre de Recherches Agronomiques, Gembloux (Belgium). Station de Phytopharmacie) | Bodson, B.
Trials carried out on winter barley crops (Hordeum vulgare L. polystichum L.) show the importance of fungicide protection at stage 31 (1st node) and especially stage 39 (flag leaf). An analysis of climatical conditions enables to confirm risks of cryptogamic developments and to justify necessary interventions. An optimalisation of fungicide protection at stage 39 can be obtained by increasing the dose of fungicide applied. The use of an increased dose at stage 39 depends on the state of the crop and on interventions carried out at stage 31 as well as rainfall between stages 31 md 39. By increasing the dose at stage 39, the yield level reached is close to that obtained following a double application at normal dose at stages 31 and 39. This improves cost-efficiency of fungicide protection md decreases the number of interventions.
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