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Prof. Ahmed Roshdy Mohamed Ahmed :: Publications:

Title:
BFFECT OF SEEDING RATES AND WEED CONTROL ON ASSOCIATED WEEDS OF BROADCAST SEEDED RICE
Authors: Roshdy. A.; Allam. S.A. and Zaher, S. A.
Year: 1993
Keywords: Not Available
Journal: Not Available
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: Local
Paper Link: Not Available
Full paper Ahmed Roshdy Mohamed Ahmed _10.pdf
Supplementary materials Not Available
Abstract:

Two field experiments were carried out at the Dornonstra tion fieldg of ICafer Saad. Domietta Governorate in L909 and 1990 seasons to investigat, the effect of seeding rates (30.40 50.60 and 70 kg/fed) and some weed control treat ments (un—weeded hand-weeded. th1obenyi bentazon and thiobenzyl + bentazon) on weed density in broadcast seeded rice. Dominant w•ods were chinochioa Cru, ji (L Link and Cyperus diffornj,. t. wh.reas Zchinochloa colonum L- was also present in small number, and not repeatable in all replications as well as at different growth stages. Increasing seeding rates significantly reduced number and. fresh and dry weights of weeds. Increasing seeding rat. from 30 to 70 kg/fed- caused a significant reductions in number of total weeds by 05 and 1.5% in the first season and by 57 and 41% in second season, at 90 and 120 days from sowing respectively Zchinochloa crus gauL was controlled significantly by thiobeazyl (2.0 1/fed). however bentazon (1.5 1/fed.) was not effective in controlling this weed at different growth stages. i.e 30.60 90 and IZO days from sowing in the both seasons Whereas ا difformis and E colonum were controlled significantly by both herbicides Moreover, hand—weeding three time. after 30 60 and 90 days from sowing, as well as thiobenzyl were the best treatments whereas bentazon gave poor control of weeds compar•d with the two previous treatments

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