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Control of Echium plantagineum L. in seed crops of Trifolium repens cv. Estanzuela Zapican in the year of sowing

, : Control of Echium plantagineum L. in seed crops of Trifolium repens cv. Estanzuela Zapican in the year of sowing. Investigaciones Agronomicas, Centro de Investigaciones Agricolas "Alberto Boerger" 5(1): 60-61

In a field trial in 1982 at La Estanzuela, herbicides were applied to T. repens 4 months after sowing and 20 days after grazing by sheep when E. plantagineum was well developed. Slight damage to the crop was caused by 0.5 or 0.7 kg 2,4-D and 0.2 or 0.3 kg acifluorfen/ha. Only 0.5 or 0.7 kg 2,4-D and 0.4 kg 2,4-D + 0.5 kg bentazone/ha gave good control. Seed yields were 309, 195 and 181 kg/ha, resp., with these 3 treatments and 155 kg with hand weeding.

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