Efficacy of some weed control treatments on dodder, cuscuta epilinum, annual weeds, growth characters and flax, linum usitatissimum L.
2010
Soliman, L.E. | El-Kady, E.A.
Two field experiments were conducted at the Experimental Farm of Sakha Agric. Res. Station, Kafr El-Sheikh, during 2007/2008 and 2008/2009 winter seasons to study the effect of different weed control treatments; i.e., butralin, metosulam, tribenuron-methyl, fluazifop-p-butyl and hand-weeding on controlling dodder (Cuscuta epilinum), broad-leaf and grass weeds and their effect on some growth characters and yield and its components of flax. Results showed that dodder and broad-leaf and grass weeds caused a great decrease in growth characters, yield components and chlorophyll a and b, compared to un-infested and un-treated plants. Hand-weeding was not enough to control dodder and annual weeds. All tested herbicides decreased the infestation with dodder up to 49 days after treatments, but increased all growth characters, straw yield and seed yield of flax in both seasons with different ratios, compared to infested control treatment. The results indicated that butralin herbicide gave the best control of dodder and total annual weeds, followed by metosulam, tribenuron-methyl and fluazifop-p-butyl. Also, data revealed that most herbicidal treatments insignificantly decreased oil content of flax seeds. These results indicated that, under heavy infested soil with dodder and total annual weeds, it was possible to use either butralin at the rate of 2.0 L/faddan (surface application) or metosulam and tribenuron-methyl as post-emergence. These practices gave the highest reduction in dodder injury and increased flax yield and its components.
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