Spreading Dogbane (Apocynum androsaemifolium) Development in Wild Blueberry Fields
| Autor: | A. Randall Olson, Nathan S. Boyd, Lin Wu, G. Christopher Cutler |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
0106 biological sciences
biology Perennial plant Apocynum androsaemifolium 04 agricultural and veterinary sciences Plant Science Growing degree-day Dogbane biology.organism_classification Weed control Flowering time 01 natural sciences 010602 entomology Horticulture Botany 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Weed Agronomy and Crop Science |
| Zdroj: | Weed Science. 61:422-427 |
| ISSN: | 1550-2759 0043-1745 |
| DOI: | 10.1614/ws-d-12-00156.1 |
| Popis: | Spreading dogbane is a common perennial weed in wild blueberry fields. It is highly competitive and spreads rapidly once established. Herbicides can provide effective control of spreading dogbane, but application timing is important. The emergence pattern, ramet height, and flowering time of spreading dogbane were observed in 2008 and 2009, and thermal-based emergence, growth, and development models were developed and used to estimate optimum herbicide application timing. Spreading dogbane emergence and height were described with a three-parameter, sigmoid, nonlinear regression model, whereas flowering was described with a four-parameter, Weibull, nonlinear regression model. Spreading dogbane ramets initiated emergence soon after the biofix date of April 1. Peak emergence tended to occur at 420 growing degree days (GDD). Spreading dogbane reached its peak height by about 558 GDD. The maximum number of flowers per plant was reached at approximately 750 GDD. This study suggested that POST herbicides should be applied between 486 and 535 GDD to maximize efficacy. This time frame occurs after peak emergence and during early floral bud development. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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