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Effect of soil herbicides on weeds yield and quality of sesame sesamum indicum


, : Effect of soil herbicides on weeds yield and quality of sesame sesamum indicum. Zeitschrift fuer Acker- und Pflanzenbau 152(3): 173-185

Three field experiments were carried out during 1978, 1979 and 1980 in Giza, Egypt, to study the effect of herbicides on weed communities and yield of sesame. Nitralin, Trifluralin, Chloramben, Fluorodifen, Metolachlor, Galex and Linuron were used. Nitralin and Trifluralin were incorporated into the soil pre-sowing, while the other herbicides were applied pre-emergence. Two checks were included, one was left without weed removal, while the plots of the other control were hand-hoed. Linuron, Chloramben, Galex and Fluorodifen were selective herbicides in sesame for controlling the annual broad-leaved weeds. Trifluralin, Nitralin, Metolachlor and Galex showed superiority in controlling annual grasses. The most harmful treatments for sesame plants were arranged in a descending order: Nitralin at 2.70 and 1.80 kg, Trifluralin at 1.60 kg, Chloramben at 0.87 kg and Fluorodifen at 3.24 kg/ha. Galex and Linuron at 1.80 kg as well as Chloramben at 0.87 kg/ha provided significant increases in seed yield/ha by 80, 60 and 57%, respectively, as compared with the unweeded check. Application of Metolachlor at 1.20 kg, Chloramben at 0.58 kg, Fluorodifen at 3.24 kg and Trifluralin at 1.60 kg produced increase in seed yield by 45, 38, 44 and 45%, respectively, compared to the unweeded check. Nitralin application at 2.70 kg caused a significant reduction in seed yield compared to the unweeded check. Increase in sesame seed yield/ha due to hand-hoeing was about 30% compared to the unweeded check. Seed oil content of sesame was not affected by the weed control treatments. Higher protein content was achieved with Nitralin at 1.80 and 2.70 kg and Galex at 1.80 kg/ha.

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