Abstract
Summary. In order to determine the phytotoxicity of dalapon—sodium to October‐sown sugar beet in southern Israel, a substantially weed‐free field was sprayed on three dates with 1·1, 2·2, 4·5 and 9·0 kg/ha a.e. Samples of beet were taken on five dates between February and July. The 9–0 kg/ha rate of dalapon caused a significant reduction in the weight of both roots and the other beet components. At 4·5 kg/ha phytotoxic effects were less marked. It is concluded that dalapon at rates lower than 4·5 kg/ha, applied between mid‐November and mid‐January, should be a safe treatment for October‐sown sugar beet where grasses rather than broad‐leaved weeds predominate.Effet du dalapon sur la croissame ei lé développement de la betterave sucrière semée en automne
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