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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=388
Last checked: 08/06/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Bristow, C. L.;
McElroy, J. S.;
Guertal, E. A. |
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| Author Affiliation: | Auburn University, Auburn |
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| Title: | Poa annua response to zinc sulfate at three different pH levels |
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| Section: | Posters: Weed management in turf
Other records with the "Posters: Weed management in turf" Section
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| Meeting Info.: | San Juan, Puerto Rico: January 24-26, 2011 |
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| Source: | 2011 Proceedings, Southern Weed Science Society. Vol. 64, 2011, p. 280. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cultural control; Herbicide resistance; Poa annua control; Soil pH; Zinc
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| Abstract/Contents: | "Poa annua L., annual bluegrass, is a problematic weed in turfgrass due to its clumping growth habit, prolific seedhead production, and unsightly color. With the increase of herbicide-resistant populations, additional control options beyond chemical control could benefit turfgrass managers. Research indicates that lowering soil pH can decrease P. annua germination. Other research in similar grass crops indicates that zinc is toxic to seedlings. The goal of this research was to determine the interactions between zinc and soil pH and their effects on annual bluegrass. Greenhouse studies were conducted at the Plant Science Research Center in Auburn, AL in 2010. Daytime and nighttime temperatures were approximately 20 and 24°C, respectively. Poa annua was grown from seed (50/pot) in pots containing a Marvyn loamy sand soil. The study was a three by five factorial randomized complete block design. There were three soil pH levels (6.8, 7.5, 7.7) and five zinc treatments (0, 34, 67, 101, 134 kg Zn/ha), replicated four times. Soil pH was adjusted using calcium hydroxide (Ca(OH)2). Zinc sulfate heptahydrate (ZnSO4 · 7H2O) was used as the zinc source. Seed and zinc were evenly broadcast over the soil surface. Germination cloth was placed over pots for the first week to maintain even surface moisture for germination. Total number of seedlings in each pot was accessed every 7 days for 28 days. Data were subjected to ANOVA. Means were separated using Fishers protected LSD (P=0.05). All zinc treatments at a soil pH of 6.8 reduced P. annua seedling survival 28 days after treatment (DAT). Zinc applied at 67 kg/ha or less at pH 7.5 or 7.7 did not reduce seedling survival 28 DAT. Zinc applied at 101 and 134 kg/ha at pH 6.8 reduced seedling survival 50-59%. Seed germination decreased with increasing zinc levels at pH 6.8, when compared to the control. Injury symptoms at all pH levels included stunting and chlorosis, which first appeared in the leaf tips and moved towards the base of the plant. Results from this study indicate that P. annua toxicity to zinc decreases as soil pH increases. Data suggests that P. annua can be reduced by applying zinc at a soil pH of 6.8 and possibly lower. Greenhouse and field studies will be continued to further evaluate these findings." |
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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):
Bristow, C. L., J. S. McElroy, and E. A. Guertal. 2011. Poa annua response to zinc sulfate at three different pH levels. South. Weed Sci. Soc. Proc. 64:p. 280. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=388
Last checked: 08/06/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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