Control of Atrazine-Resistant Palmer Amaranth (Amaranthus palmeri) in Double-Crop Grain Sorghum. (14th March 2019)
- Record Type:
- Journal Article
- Title:
- Control of Atrazine-Resistant Palmer Amaranth (Amaranthus palmeri) in Double-Crop Grain Sorghum. (14th March 2019)
- Main Title:
- Control of Atrazine-Resistant Palmer Amaranth (Amaranthus palmeri) in Double-Crop Grain Sorghum
- Authors:
- Hay, Marshall M.
Albers, Jeffrey J.
Dille, J. Anita
Peterson, Dallas E. - Abstract:
- Abstract: Double-crop grain sorghum after winter wheat harvest is a common cropping system in the southern plains region. Palmer amaranth is a troublesome weed in double-crop grain sorghum in Kansas. Populations resistant to various herbicides (e.g., atrazine, glyphosate, metsulfuron, pyrasulfotole) have made Palmer amaranth management even more difficult for producers. To evaluate control of atrazine-resistant and atrazine-susceptible Palmer amaranth in double-crop grain sorghum, we assessed 14 herbicide programs, of which 8 were PRE only and 6 were PRE followed by (fb) POST applications. Visible ratings of Palmer amaranth control were taken at 3 and 8 wk after planting (WAP) grain sorghum. PRE treatments containing very-long-chain fatty acid (VLCFA)–inhibiting herbicides provided 91% control of atrazine-resistant Palmer amaranth 3 WAP, and reduced weed density 8 WAP compared to atrazine-only PRE treatments. PRE fb POST treatments, especially those that included VLCFA-inhibiting herbicides, provided greater control (71% to 93%) of both atrazine-resistant and atrazine-susceptible Palmer amaranth, respectively, at 8 WAP compared to PRE treatments alone (59% to 79%). These results demonstrated the utility of VLCFA-inhibiting herbicides applied PRE and in a layered PRE fb POST approach in controlling atrazine-resistant Palmer amaranth, as well as the importance of an effective POST application following residual PRE herbicides for controlling both atrazine-resistant andAbstract: Double-crop grain sorghum after winter wheat harvest is a common cropping system in the southern plains region. Palmer amaranth is a troublesome weed in double-crop grain sorghum in Kansas. Populations resistant to various herbicides (e.g., atrazine, glyphosate, metsulfuron, pyrasulfotole) have made Palmer amaranth management even more difficult for producers. To evaluate control of atrazine-resistant and atrazine-susceptible Palmer amaranth in double-crop grain sorghum, we assessed 14 herbicide programs, of which 8 were PRE only and 6 were PRE followed by (fb) POST applications. Visible ratings of Palmer amaranth control were taken at 3 and 8 wk after planting (WAP) grain sorghum. PRE treatments containing very-long-chain fatty acid (VLCFA)–inhibiting herbicides provided 91% control of atrazine-resistant Palmer amaranth 3 WAP, and reduced weed density 8 WAP compared to atrazine-only PRE treatments. PRE fb POST treatments, especially those that included VLCFA-inhibiting herbicides, provided greater control (71% to 93%) of both atrazine-resistant and atrazine-susceptible Palmer amaranth, respectively, at 8 WAP compared to PRE treatments alone (59% to 79%). These results demonstrated the utility of VLCFA-inhibiting herbicides applied PRE and in a layered PRE fb POST approach in controlling atrazine-resistant Palmer amaranth, as well as the importance of an effective POST application following residual PRE herbicides for controlling both atrazine-resistant and atrazine-susceptible Palmer amaranth in double-crop grain sorghum. … (more)
- Is Part Of:
- Weed technology. Volume 33:Number 1(2019)
- Journal:
- Weed technology
- Issue:
- Volume 33:Number 1(2019)
- Issue Display:
- Volume 33, Issue 1 (2019)
- Year:
- 2019
- Volume:
- 33
- Issue:
- 1
- Issue Sort Value:
- 2019-0033-0001-0000
- Page Start:
- 115
- Page End:
- 122
- Publication Date:
- 2019-03-14
- Subjects:
- David Johnson, Pioneer/DuPont
Atrazine, -- glyphosate, -- metsulfuron, -- pyrasulfotole, -- Palmer amaranth, Amaranthus palmeri S. Wats., -- grain sorghum, Sorghum bicolor L., -- winter wheat, Triticum aestivum L.
Herbicide resistance, -- layered residual, -- PRE fb POST, -- soil-applied residual, -- very-long-chain fatty acid–inhibiting herbicides
Weeds -- Periodicals
Weeds -- Control -- Periodicals
632.5 - Journal URLs:
- https://www.cambridge.org/core/journals/weed-technology ↗
- DOI:
- 10.1017/wet.2018.102 ↗
- Languages:
- English
- ISSNs:
- 0890-037X
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library STI - ELD Digital store
- Ingest File:
- 9624.xml