Abstract - Effects of herbicide mixtures, surfactants and spray volumes on the control of imperata cylindrica (l). raeuschel


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	Publications of MRB Latest Publications MRB Digest Journal of Rubber Research 3^rd Qtr 2008 Vol 11(3) 2^nd Qtr 2008 Vol 11(2) 1^st Qtr 2008 Vol 11(1) 4^th Qtr 2007 Vol 10(4) 3^rd Qtr 2007 Vol 10(3) 2^nd Qtr 2007 Vol 10(2) 1^st Qtr 2007 Vol 10(1) 1^st Qtr 2006 Vol 9(1) 2^nd Qtr 2006 Vol 9(2) 3^rd Qtr 2006 Vol 9(3) 4^th Qtr 2006 Vol 9(4) Submit paper/article Order Form	Abstract Effects of herbicide mixtures, surfactants and spray volumes on the control of imperata cylindrica (l). raeuschel The effects of selected herbicide mixtures, surfactants and spray volumes on Imperata cylindrica under immature rubber were compared. Mixtures of glyphosate at 1.08 kg ae/ha with either 2,4-D dimethylamine at 0.03, 0.05 or 0.08 kg ae/ha or fluroxypyr at 0.01, 0.02 or 0.03 kg ae/ha resulted in reduced control. Mixtures of glyphosate at 1.08 kg ae/ha with glufosinate ammonium at 0.15 or 0.3 kg ai/ha produced comparable control while reduced control was obtained when mixed with paraquat at 0.2 or 0.4 kg ai/ha. Glyphosate at 0.54 kg ae/ha improved control when mixed with imazapyr at 0.3 kg ae/ha while comparable control was obtained when glyphosate at 1.08 kg ae/ha was mixed with imazapyr at 0.15 or 0.3 kg ae/ha. Glyphosate at 1.08 or 2.16 kg ae/ha exhibited slight enhancement in control when mixed with the cationic surfactants Hyspray 52^®, Ethokem^® or Arsenal 62^®. Addition of the organosilicone surfactant Pulse 250^® at 1.0 or 2.0 l/ha to glyphosate at 1.08 kg ae/ha or imazapyr at 0.5 kg ae/ha improved control. Spray volumes of 85 l/ha with the controlled droplet applicator or 480, 560 and 640 l/ha with the knapsack sprayer using glyphosate at 1.44 ae/ha or imazpyr at 0.5 kg ae/ha showed almost comparable control.
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