Abstract
Summary. Two experiments on chemical weed control in marrowstem kale are reported. In the first of these three herbicides applied before sowing were compared; in the second experiment four herbicides were studied, one applied before sowing and the others applied after emergence. Of all the herbicides examined, EPTC, applied before sowing and incorporated into the seedbed, was the most satisfactory in terms of both weed control and yield of kale. Neither endothal + propham nor dinoseb + TCA proved satisfactory as pre‐sowing treatments. The three herbicides applied post‐emergence (all methylmercapto triazines) were ineffective for the control of Polygonum spp. and Poa annua, although fairly effective against Stellaria media and Chenopodium album. They caused considerable damage to the crop and reduced yields by at least 25%.Le désherbage du chou moellier par l'EPTC et quelques autres herbicides
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