PERFORMANCE OF RICE AT DIFFERENT RATES OF CHEMICAL HERBICIDES

Abed Jaber, Flayeh; Khidir.A.Hameed,; K. Shati, Reasan

	PERFORMANCE OF RICE AT DIFFERENT RATES OF CHEMICAL HERBICIDES
The Iraqi Journal of Agricultural Science
Article 1, Volume 42, Issue 1, 2011, Pages 22-30
Authors
Flayeh Abed Jaber; ; Reasan K. Shati
Abstract
A field trial was carried out during summer season of 2008 and 2009 at Mishkab Research Station Al-Najaf Governorate to investigate the effect of Herbicides (Contail, Stam F-34 , Ronstar and Nominee) on paddy yield of rice and companion weeds. A factorial experiment design was used according to RCBD design with four replications.Nominee caused reduced number of weed, at 30, 60 and 90 days from plant sowing in both seasons (6.3, 14.8, 16.7,4.2, 10.3 and 12.6 plant.m-2)and also reduced the dry weight of weeds by 87% and 89.2% in both seasons respectively compared with weedy treatment , therefore, it gave highest number of tillers .m-2 in both seasons (316.2 and 292.4) respectively which was translated in the higher number of grain per panicle (140.8 and 142.5 grains) in both seasons respectively hence nominee herbicide gave highest grain yield in the first season 801.4 gm.m-2 and 758.4gm.m-2 in second season respectively while the weedy treatment gave lowest paddy yield of rice 225.1 and 253.1 gm.m-2 in both seasons respectively. The nominee increased paddy rice by 71.9% in first season and 66.8% in second season compared with weedy treatment. We can conclude that herbicide gave good weed control of weed's rice , so rice was more competive than weed. Also there were significant difference between herbicide in their effect on growth and yield character.

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