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| Web URL(s): | http://www.jstor.org/stable/4043009
Last checked: 04/28/2014
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http://www.jstor.org/stable/pdfplus/4043009.pdf
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| Publication Type:
| Refereed |
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| Author(s): | Watschke, T. L.;
Long, F. W.;
Duich, J. M. |
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| Author Affiliation: | Watschke: Assoc. Prof.; Long: Res. Aide; Duich: Prof., Pennsylvania State Univ., University Park, PA |
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| Title: | Control of Poa annua by suppression of seedheads with growth regulators |
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| Source: | Weed Science. Vol. 27, No. 2, March 1979, p. 224-231. |
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| Publishing Information: | Champaign, IL: Weed Science Society of America |
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| # of Pages: | 8 |
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| Related Web URL: | http://www.jstor.org/stable/info/4043009#abstract
Last checked: 05/06/2014
Notes: Abstract only |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Poa pratensis; Maleic hydrazide; Endothall; Seedhead inhibition; Poa annua; Growth regulators; Poa annua control
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| Abstract/Contents: | "Field and greenhouse studies were conducted to determine the degree to which annual bluegrass (Poa annua L.) could be controlled by inhibiting seedheads. The materials used were: MH (1,2-dihydro-3,6-pyridazinedione); chlorflurenol (methyl 2-chloro-9-hydroxyfluorene-9-carboxylate), plus methyl 9-hydroxyfluorene-9-carboxylate, and methyl 2,7-dichloro-9-hydroxyfluorene-9-carboxylate; and endothall [7-oxabicyclo (2.2.1) heptane-2,3-dicarboxylic acid]. The effects of these materials on pollen quality and the viability of seed produced by treated plants were also determined. For all chemicals used, multiple applications at low rates resulted in better seedhead inhibition than single treatments at higher rates and their effects lasted longer. However, treatments that inhibited seedheads by an amount predicted to reduce annual bluegrass (more than 75%) often caused objectionable foliar discoloration. Endothall, particularly the granular formulation, caused excessive injury at all rates. All growth regulators reduced the number of seed produced, which affected the number of seeds that germinated from soil that was taken from treated plots. The number of seed found in the soil was sufficient to allow the stand to be self-perpetuating. All treatments reduced the percentage of fertile pollen, however, this reduction was not significant because the germination of seed harvested from treated plants was not reduced significantly. Even though these treatments reduced seedheads significantly, the population of annual bluegrass the following year was not reduced." |
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| Language: | English |
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| References: | 8 |
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| See Also: | Other items relating to: POA |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Watschke, T. L., F. W. Long, and J. M. Duich. 1979. Control of Poa annua by suppression of seedheads with growth regulators. Weed Sci. 27(2):p. 224-231. |
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| Web URL(s):
http://www.jstor.org/stable/4043009
Last checked: 04/28/2014
Access conditions: Item is within a limited-access website
http://www.jstor.org/stable/pdfplus/4043009.pdf
Last checked: 05/02/2014
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: SB 610 .W38 |
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