El-Sayed,, S., Khalil, M., EI-Barrawy, M. (2002). EFFECTS OF SOME HERBICIDE TREATMENTS ON ONION (Allium cepa L.).. Journal of Plant Production, 27(11), 7373-7384. doi: 10.21608/jpp.2002.257037
S. F. El-Sayed,; M. K. Khalil; M. A. EI-Barrawy. "EFFECTS OF SOME HERBICIDE TREATMENTS ON ONION (Allium cepa L.).". Journal of Plant Production, 27, 11, 2002, 7373-7384. doi: 10.21608/jpp.2002.257037
El-Sayed,, S., Khalil, M., EI-Barrawy, M. (2002). 'EFFECTS OF SOME HERBICIDE TREATMENTS ON ONION (Allium cepa L.).', Journal of Plant Production, 27(11), pp. 7373-7384. doi: 10.21608/jpp.2002.257037
El-Sayed,, S., Khalil, M., EI-Barrawy, M. EFFECTS OF SOME HERBICIDE TREATMENTS ON ONION (Allium cepa L.).. Journal of Plant Production, 2002; 27(11): 7373-7384. doi: 10.21608/jpp.2002.257037
EFFECTS OF SOME HERBICIDE TREATMENTS ON ONION (Allium cepa L.).
Three field experiments were conducted during 94/1995, 95/1996 and 97/1998 seasons to study the effect of some herbicide treatments on growth characteristics, yield and chemical constituents on onion (Allium cepa L.) plant. Plant height and number of leaves/plant were significanlly decreased when a single application of oxyfluorfen or methabenzthiazuron or fluazifop-butyl was applied at 21 days after sowing (OAS.). The highest significant dry weighUplant and total bulb yield were obtained when onion plants were treated either oxyfluorfen or methabenzthiazuron plus fluazifop-butyl were applied twice at 21and 63 D.A.S. Chlorophytls (a and total) concentrations showed the lowest values when a single application of fluazltop-butyl (125 or 250 g a.iJfeddan=fed.) was applied at 21 or 42 DAS. All herbicides combination treatments increased total nitrogen concentration in onion leaves, while phosphorus and potassium concentration were not affected. Single application of fluazifop-butyl at 125 or 250 9 a.i.lfed. Significantly decreased hydrolysable carbohydrates concentration in onion leaves. Oxyfluorfen alone or in combination wilh nuazifop-butyl increased the hydrolysable carbohydrates concenlration in onion leaves. All weed treatments did not alter the studied chemical constituents of the harvested onion bulbs. Thus, the best chemical weed control treatment in direct-seed onion is to apply oxyfluorfen (90 + 180 g a.i.lfed.) or methabenzthiazuron (350 + 700 9 a.i./fed.) with fluazifop-butyl (125 + 250 9 a.i./fed.) in two applications at21 and 63 D.A.S.
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