Author
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Richard Jr, Edward |
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Submitted to: Proceedings of Southern Weed Science Society
Publication Type: Abstract Only Publication Acceptance Date: 1/27/1998 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Sugarcane injury following azafenidin PRE at planting at 0.56, 0.84, and 1.12 kg ai/ha was no greater than the injury observed with a standard application of metribuzin at 2.24 kg ai/ha. Azafenidin POST to sugarcane in the spring of 1995 and 1996 resulted in a reddening of the treated leaves within 7 days that was transient in nature and did not appear to be rate dependent. For applications made in the spring of 1997 when rainfall was more frequent, sugarcane injury was generally higher 4 WAT ranging from 14 to 18% for all rates and soil types. Sugar yields following single at-planting or spring applications or at-planting followed by spring sequential applications of azafenidin were similar to the corresponding metribuzin treatments in weed-free experiments conducted during the 1994/1995 and 1995/1996 growing seasons and following at-planting only applications of azafenidin in the 1996/1997 growing season. In a separate experiment in 1997, seedling johnsongrass control following spring applications of azafenidin at 0.84 kg/ha was equivalent to the control observed with metribuzin and higher than the control obtained with a standard application of pendimethalin plus diuron. As a result of the johnsongrass control, sugar yields were 1,980 kg/ha higher than the non-treated check (8,880 kg/ha) when metribuzin was applied. Sugar yields following spring-only applications of azafenidin at 0.84 and 1.12 kg/ha were intermediate, 10,310 to 9,700 kg/ha, respectively, but not different from the non-treated check. |
