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| Publication Type:
| Report |
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| Author(s): | Fishel, F. M.;
Coats, G. E. |
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| Author Affiliation: | Department of Plant Pathology and Weed Science, Mississippi State University, Mississippi State, MS |
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| Title: | Crabgrass control in turf with prodiamine and MON-15100 |
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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. 140. |
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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: | "Field experiments were conducted to determine efficacy of prodiamine and MON-15100 for crabgrass control and tolerance of bermudagrass at the Plant Science Research Center, Starkville. Except at the higher rate applied twice annually, density of 'Tifgreen' bermudagrass was not reduced significantly during a period of 4 years in which prodiamine was applied at 2.2 or 4. kg/ha/application in the spring, or in the spring and repeated in the fall of each year. However, this rate (total of 8.8 kg/ha annually) had caused less than 25% stand reduction at the termination of the experiment after 4 years. Crabgrass (mixed smooth and southern) control with 0.8 kg/ha prodiamine each year for 4 years equaled that obtained with 3.4 kg/ha pendimethalin, oryzalin, or 1.7 + 1.7 kg/ha benefin plus oryzalin. Fertilizer formulations [19-4-6, 18-4-10, or 16-6-8 ammoniated and 19-4-9 (source # 1), or 19-4-9 (source # 2) blended with a screen analysis (pass-through/retained) of 20/30, 8/20, 20/30, 8/20, and 8/20; respectively], provided equally effective crabgrass control at 0.8 and 1.1 kg/ha prodiamine compared to the equivalent rate applied as a spray (WD formulation) with the same amount of fertilizer applied separately. In experiments where prodiamine was applied at 7, 5, or 3 months before overseeding, stand establishment and density of perennial and Italian ryegrass, roughstalk bluegrass, and red fescue was not adversely affected by 2.2 kg/ha was applied 3 months prior to overseeding, but not if applied 5 or 7 months prior to overseeding. Density of common bermudagrass was not reduced by single or sequential applications of <=2.2 kg/ha. In 1988, MON-15172 (0.5% G) maintained 70% or better control of crabgrass for 6 months after treatment in 'Tifdwarf' bermudagrass when applied at 0.4 kg/ha or higher rates but not at 0.3 kg/ha. In 1987 and 1988, MON-15126 (EC) applied at 0.6 kg/ha (lower rates not evaluated) provided control equivalent to 3.4 kg/ha pendimethalin, oryzalin, or benefin plus oryzalin. Visual differences in turfgrass canopy of common, 'Tifdwarf', or 'Tifway' bermudagrasses were not observed during 1987 or 1988 at 1.1 kg/ha. In an experiment in which 0.6 and 1.1 kg/ha MON-15172 was applied in March and plugs removed from treated plots at 2, 4, and 8 weeks after treatment, rooting of common bermudagrass was significantly reduced as compared to 1.7 and 3.4 kg/ha pendimethalin or oxadiazon and 0.6 and 1.1 kg/ha prodiamine. When 10-cm diameter plugs taken 2.5-cm deep were placed on sand in the greenhouse and allowed to grow for 4 weeks, fresh weight of roots growing n the sand was reduced 16 and 23, 8 and 41, 23 and 24, and 63 and 94% for the low and high rates of prodiamine, pendimethalin, oxadiazon, and MON-15171." |
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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):
Fishel, F. M., and G. E. Coats. 1989. Crabgrass control in turf with prodiamine and MON-15100. South. Weed Sci. Soc. Proc. 42:p. 140. |
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