Abstract:

Pot experiments were conducted to evaluate the control effect of 24 herbicides against Alternanthera philoxeroICes (Mart.) Griseb. The results showed that fresh weight control of 17 herbicides was more than 80.0% at recommended dose, and laboratory toxicity of the 17 herbicides was tested. The toxicity of fluroxypyr was the highest, while that of glyphosate was the lowest, with the IC90 20.07 g a.i./ha and 560.79 g a.i./ha, respectively. The order of laboratory toxicity was fluroxypyr > flumioxazin > tribenuron-methyl > oxyfluorfen > metribuzin > dicamba > fomesafen >2,4-D butylate > mesotrione > paraquat > acifluorfen > oxadiazon > lactofen > isoproturon >MCPA-sodium > fluoroglycofen-ethyl > glyphosate. Based on comprehensive consideration of characteristics and recommended dose of the 17 herbicides, fluroxypyr, flumioxazin, tribenuron-methyl, oxyfluorfen, metribuzin, dicamba, fomesafen, 2,4-D butylate, mesotrione, paraquat, acifluorfen, isoproturon, MCPA-sodium and glyphosate could be used to control Alternanthera philoxeroICes (Mart.) Griseb. Herbicides except tribenuron-methyl could control Alternanthera philoxeroICes (Mart.) Griseb thoroughly at recommended dose, tribenuron-methyl should be applied at a little higher dose than its recommended dose.