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| Web URL(s): | https://neppsc.org/wp-content/uploads/2020-NEPPSC-Proceedings-FINAL.pdf#page=73
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file
https://www.newss.org/wp-content/uploads/2020-NEWSS-Proceedings-FINAL.pdf#page=72
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy-fourth Annual Meeting of the Northeastern Weed Science Society reprint |
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| Publication Type:
| Proceedings |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Diehl, K. H.;
Elmore, M. T.;
Murphy, J. A.;
Koppenhöfer, A. M.;
Kostromytska, O. S. |
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| Author Affiliation: | Rutgers University, New Brunswick, NJ |
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| Title: | Annual bluegrass weevil (Listronotus maculicollis) overseeding, and paclobutrazol for annual bluegrass (poa annua) control in golf fairways |
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| Meeting Info.: | Philadelphia, Pennsylvania: January 6-9, 2020 |
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| Source: | Proceedings of the Fifth Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Vol. 5, 2020, p. 43. |
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| Publishing Information: | s.l.: Northeastern Weed Science Society; Northeastern Regional Branch of the American Society of Agronomy, Crop Science Society of America, & Soil Science Society of America; and American Society of Horticultural Science - Northeastern Division |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Annual bluegrass (Poa annua L.) is one of the most problematic weeds of cool-season turfgrass. The annual bluegrass weevil (Listronotus maculicollis; ABW) is a turfgrass pest that showcases ovipositional preference for annual bluegrass over creeping bentgrass (Agrostis stolonifera L.). Turfgrass managers typically use insecticides to control ABW preventatively and avoid turfgrass damage. We hypothesized that withholding ABW insecticides until a damage threshold was met would reduce annual bluegrass cover in creeping bentgrass fairways. The effect of ABW damage was tested alone and in combination with monthly applications of paclobutrazol and creeping bentgrass overseeding. Research was conducted from 2017 to 2018 on a simulated creeping bentgrass fairway infested with annual bluegrass at the Rutgers Horticulture Farm No. 2 in North Brunswick, NJ. Three insecticide programs were evaluated in combination with paclobutrazol and overseeding in a 3 x 2 x 2 complete factorial. Treatments were replicated four times and arranged in a split-split plot design with overseeding as a whole plot factor, insecticide program as the sub-plot factor, and paclobutrazol as the sub-sub plot factor. Paclobutrazol (280 g ha--1) was applied monthly from May through October. The first insecticide program (preventative) was an industry standard designed to control early ABW larval stages and prevent turfgrass injury. In the second program (threshold), no insecticides were applied until visual ratings determined that ABW damage resulted in unacceptable turfgrass quality. Once this damage threshold was met, an insecticide was applied to prevent future turfgrass injury. No insecticides were applied to the third program (noinsecticide) for ABW control. Whole plots were overseeded with '007' creeping bentgrass (49 kg ha-1) on 12 June 2017 and 2018, approximately one week after the damage threshold was met. To evaluate the efficacy of the insecticide programs, cores (6 cm in diameter) were taken from each plot and larvae were extracted in salt solution. Extracted larvae were counted and used to determine the average larval density per plot. Turfgrass quality, annual bluegrass quality and creeping bentgrass quality were evaluated monthly on a 1 (poor) to 9 (excellent) scale where 6 is considered acceptable. Lightbox photos were taken monthly and subjected to digital analysis (Turf Analyzer software). Percent annual bluegrass cover was evaluated visually each month and grid intersect counts were taken in November. Data were subjected to ANOVA in SAS (v9.4) as a split-split plot design using the MIXED procedure (a=0.05) and Fishers Protected LSD (a=0.05) was used to separate means. The main effect of paclobutrazol was significant for annual bluegrass cover from May 2017 through April 2019. The main effect of insecticide program was significant in July 2017 and from September 2018 until the experiment was concluded in April 2019. Interactions between main effects were observed in July and August in 2018, and on the final rating sat in April 2019. At the conclusion of this two-year experiment in April 2019, paclobutrazol treated plots had 0% annual bluegrass cover. In the absence of paclobutrazol, annual bluegrass cover was lower in the no-insecticide program (23%), than the threshold and preventative programs (37-44%) at the conclusion of the experiment. Overseeding did not affect annual bluegrass cover either year." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
Reprint appears in Proceedings of the Seventy-fourth Annual Meeting of the Northeastern Weed Science Society 2020, Vol. 74, p. 43 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Diehl, K. H., M. T. Elmore, J. A. Murphy, A. M. Koppenhöfer, and O. S. Kostromytska. 2020. Annual bluegrass weevil (Listronotus maculicollis) overseeding, and paclobutrazol for annual bluegrass (poa annua) control in golf fairways. p. 43. In Proceedings of the Fifth Annual Meeting of the Northeastern Plant, Pest, and Soils Conference. Philadelphia, Pennsylvania: January 6-9, 2020. s.l.: Northeastern Weed Science Society; Northeastern Regional Branch of the American Society of Agronomy, Crop Science Society of America, & Soil Science Society of America; and American Society of Horticultural Science - Northeastern Division. |
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| Web URL(s):
https://neppsc.org/wp-content/uploads/2020-NEPPSC-Proceedings-FINAL.pdf#page=73
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file
https://www.newss.org/wp-content/uploads/2020-NEWSS-Proceedings-FINAL.pdf#page=72
Last checked: 06/22/2023
Requires: PDF Reader
Notes: Item is within a single large file; Proceedings of the Seventy-fourth Annual Meeting of the Northeastern Weed Science Society reprint |
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