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Title: AZAFENIDIN: A NEW BROAD-SPRECTRUM HERBICIDE FOR SUGARCANE

Author
item Richard Jr, Edward
item CASTNER, E - DUPONT AGRIC PRODUCTS
item TURNER, R - DUPONT AGRIC PRODUCTS

Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: 6/19/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Azafenidin has been evaluated under the code name of DPX-R6447 in Louisiana, for the preemergence control of both cool- and warm-season seedling weeds in sugarcane. To date, DPX-R6447 applied at planting at rates of 0.56 to 1.12 kg ai/ha has provided good to excellent control of a number of cool-season weeds including: ryegrass, Carolina geranium, purslane, henbit, and sowthistle. March applications of DPX-R6447 at similar rates has controlled many warm-season seedling weeds including: johnsongrass, junglerice, itchgrass, and a number of morningglory species. Acceptable (greater than 60%) levels of purple and yellow nutsedge control have also been observed with at-planting and March applications of DPX- R6447, particularly at the higher rates. Sugarcane injury 4 weeks after at-planting applications of DPX-R6447 was minimal (less than 10%). When DPX-R6447 was applied postemergence to the crop in the spring some crop injury in the form of a reddening of the treated leaves was observed withi 7 days of treatment. The injury was generally rate-dependent and transient in nature and was not evident as a reduction in harvestable sugarcane stalk counts, heights,or weights or as a reduction in gross cane and sugar yields when compared to standard applications of metribuzin at 2.0 kg ai/ha, terbacil at 1.6 kg ai/ha, mixtures of pendimethalin with atrazine each at 3.0 kg ai/ha.