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| Publication Type:
| Report |
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| Author(s): | Johnson, B. J.;
Carrow, R. N.;
Murphy, T. R. |
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| Author Affiliation: | Murphy: Agronomy Department; Johnson and Carrow: Agronomy Department, The University of Georgia, Griffin, GA |
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| Title: | Effect of iron chelate on herbicide injury to bermudagrass |
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| Section: | Weed control in turf, pasture, and rangeland
Other records with the "Weed control in turf, pasture, and rangeland" Section
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| Meeting Info.: | Nashville, Tennessee: January 16-18, 1989 |
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| Source: | Proceedings: Southern Weed Science Society. Vol. 42, 1989, p. 146. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Managers of intensively used Turfgrass areas are often reluctant to use MSMA and imazaquin during the summer months due to complaints by clientele of temporary bermudagrass injury. An experiment was conducted at the Georgia Station to determine the potential of iron chelate (Fe) to reduce injury from these herbicides to 'Tifway' bermudagrass (Cynodon transvaalensis Burtt-Davy) X [Cynodon dactylon (L.) Pers.]. MSMA at 2.2 and 6.6 kg/ha, imazaquin at 0.4 and 1.2 kg/ha, and MSMA + imazaquin at 2.2 + 0.4 and 6.6 + 1.2 kg/ha was applied alone or tank-mixed with Fe at 0.3 and 1.3 kg/ha to Tifway bermudagrass on August 16, 1988. The FE source was Lawn-Plex - RGB Laboratories (Kansas City, MO), 8% sulfur and 8% iron chelate derived from ammonium thiosulfate and iron phosphate-citrate. Triton AG-98 at 0.25% was included with all treatments. Treatments were arranged in a RCBD with three replications. Bermudagrass quality and injury ratings were recorded at various time intervals for up to 28 days after treatment (DAT). Tifway bermudagrass did not readily respond to foliar applications of Fe. Iron, at both rates, slightly improved (3%) quality only at 14 DAT. No other improvements in quality were observed during the experiment. Both rates of Fe decreased MSMA injury to bermudagrass at 2 and 4 DAT. At 2 DAT, Fe at 1.3 kg/ha reduced injury more (12%) than at 0.3 kg/ha for MSMA at 6.6 kg/ha. Bermudagrass rapidly recovered from initial MSMA injury and by 6 DAT Fe had no effect on injury or quality. Iron did not effectively reduce initial imazaquin injury to bermudagrass. At 0.4 kg/ha of imazaquin, slight reductions (<=8%) in injury occurred at 14 and 21 DAT for Fe at 1.3 kg/ha. At the same rate of imazaquin, Fe at 0.3 kg/ha reduced injury 5% only at 21 DAT. Iron did not reduce bermudagrass injury for imazaquin at 1.3 kg/ha. Iron, at 0.3 was as effective as 1.3 kg/ha in reducing bermudagrass injury to MSMA + imazaquin at 2.2 + 0.4 kg/ha for up to 6 DAT. Both rates of FE decreased injury for up to 14 DAT for MSMA + imazaquin at 6.6 + 1.2 kg/ha. Bermudagrass injury from MSMA + imazaquin at 6.6 + 1.2 kg/ha was less with Fe at 1.3 than at 0.3 kg/ha for up to 6 DAT." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Finding a common ground"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johnson, B. J., R. N. Carrow, and T. R. Murphy. 1989. Effect of iron chelate on herbicide injury to bermudagrass. South. Weed Sci. Soc. Proc. 42:p. 146. |
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