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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Fagerness, Matthew;
Penner, Donald |
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| Author Affiliation: | Graduate Assistant and Professor, Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824 |
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| Title: | Factors which may interact with spray carrier volume to affect trinexapac-ethyl efficacy |
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| Article Series: | Industrial, forestry, turf, and aquatics |
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| Meeting Info.: | December 10-12, 1996; St. Louis, MO |
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| Source: | Proceedings of the North Central Weed Science Society. Vol. 51, 1996, p. 104-105. |
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| Publishing Information: | Champaign, IL: North Central Weed Science Society |
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| # of Pages: | 2 |
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| Abstract/Contents: | "Trinexapac-ethyl is a foliar-applied turfgrass growth regulator preferably absorbed by the base of turfgrass plants. The range of recommended spray carrier volumes for trinexapac-ethyl is from 187 to 1627 L/ha. Based on the preferred absorption site it was hypothesized that factors interacting with spray carrier volume could influence trinexapac-ethyl efficacy. A field study was conducted in the fall of 1996 to determine if spray volume, 187, 561, and 1683 L/ha, interacted with cutting height, 5, 7.5, and 10 cm, to affect trinexapac ethyl efficacy on Blacksburg Kentucky bluegrass. Trinexapac-ethyl was applied at 0.29 kg/ha. Dry weights of clippings harvested from all plots were evaluated a 7, 14, 21, and 28 DAT. At 21 DAT, trinexapac-ethyl activity was not affected by spray volume at the 7.5 cm cutting height. At either the 5 or 10 cm cutting height, trinexapac-ethyl activity increased with increasing spray volume. A greenhouse study was done to determine if the adjuvants, ammonium sulfate or Sylgard 309, interacted with spray carrier volume to affect the efficacy of trinexapac-ethyl on Mondial perennial ryegrass. Treatments included trinexapac-ethyl at 0.19 kg/ha with ammonium sulfate (0.5% v/v), Sylgard 309 (0.5% v/v), or both. Spray carrier volumes studied were 187, 561, 935, 1309, and 1683 L/ha. Fresh weights of clippings harvested from all treatments were evaluated at 7, 14, 21, and 28 DAT. At 14 DAT, ammonium sulfate at 187 L/ha spray carrier volume increased and at 1683 L/ha decreased the activity of trinexapac-ethyl as compared to treatments containing only trinexapac-ethyl. A similar pattern was not seen with Sylgard 309. Efficacy observed suggested the interaction of site of absorption movement of trinexapac-ethyl in the turf profile as a function of cutting height, spray carrier volume, and adjuvant effect." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fagerness, M., and D. Penner. 1996. Factors which may interact with spray carrier volume to affect trinexapac-ethyl efficacy. Proc. North Cent. Weed Sci. Soc. 51:p. 104-105. |
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MSU catalog number: SB 610 .N6 |
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