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Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Coats, G. E. |
Author Affiliation: | Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762 |
Title: | Influence of fertilizer particle size on pre herbicide efficacy in warm season turfgrasses |
Section: | Papers and Abstracts Presented Other records with the "Papers and Abstracts Presented" Section
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Meeting Info.: | 49th Annual Meeting, Charlotte, NC, January 15-17, 1996 |
Source: | Southern Weed Science Society Proceedings. Vol. 49, 1996, p. 69. |
Publishing Information: | Champaign, IL: Southern Weed Science Society. |
# of Pages: | 1 |
Abstract/Contents: | "A commercial turfgrass grade fertilizer (40-0-0, N-P-K) was screened into seven particle sizes ranging from 23 to 10,600 particles/g, and each impregnated with 3.28% ai oryzalin, 2.76% ai oxadiazon, 0.689% prodiamine, or 0.345% dithiopyr by weight. Treatments of 1120 to 6720 g ai/ha oryzalin or oxadiazon, 224 to 1680 g ai/ha prodiamine, or 14 to 840 g ai/ha dithiopyr were applied to common bermudagrass [Cynodon dactylon (L.) Pers.] on March 13, 1995, prior to emergence of southern crabgrass [Digitaria ciliaris (Retz) Koel.]. The plots were seeded with 50 kg/ha southern crabgrass seed and total nitrogen was adjusted to 2240 g/ha for all treatments by addition of the same particle size and grade fertilizer with no herbicide. After treatment, the plot area was maintained at a mowing height of 3.5 cm. Southern crabgrass control ratings were made at 155 days after treatment. Acceptable control (≥80%) was achieved with ≥ 58 particles/g with oxadiazon, oryzalin, or dithiopyr, or ≥ 165 particles/g with prodiamine with normal use rates (3360 g/ha oryzalin or oxadiazon; 840 g/ha prodiamine or 560 g/ha dithiopyr). Overall, efficacy increased with reduced particle size at less than normal use rates." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Coats, G. E. 1996. Influence of fertilizer particle size on pre herbicide efficacy in warm season turfgrasses. South. Weed Sci. Soc. Proc. 49:p. 69. |
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