Abstract
Use of in-row cover crops for weed management in first-year vineyards was investigated in two studies. In the first study, rye ( Secale cereal L. 'Wheeler') was fall-planted, overwintered, then managed by three methods before vine planting. Rye was either herbicide-desiccated with glyphosate and left on the surface as a mulch, mowed, or incorporated into the soil (cultivated). Weed density and growth of grapevines ( Vitis spp.) were evaluated. Herbicide desiccation was superior to the other methods for weed suppression, with weed densities 3 to 8 times lower than for mowed or cultivated plots. Vine growth was similar among treatments, but the trend was for more shoot growth with lower weed density. In a second study, four cover crops, rye, wheat ( Triticum aestivum L. 'Cardinal'), oats ( Avena sativa L. 'Ogle'), and hairy vetch ( Vicia villosa Roth), were compared. Wheat and rye were fall- and spring-planted, and oats and vetch were spring-planted, then desiccated with herbicides (glyphosate or sethoxydim) after vine planting and compared to weed-free and weedy control plots for weed suppression and grapevine growth. Cover crops provided 27% to 95% reduction in weed biomass compared to weedy control plots. Total vine dry mass was highest in weed-free control plots, was reduced 54% to 77% in the cover crop plots, and was reduced 81% in the weedy control. Fall-planted wheat and rye and spring-planted rye plots produced the highest vine dry mass among cover crop treatments. Spring-planted rye provided the best combination of weed suppression and vine growth. Chemical names used: N -(phosphonomethyl) glycine (glyphosate isopropylamine salt); 2-[l-(ethoxyimino)butyl]5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one (sethoxydim).
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Claims 9
Claim · model-written summary
Herbicide desiccation of rye suppressed weeds better than mowing or cultivation, with weed densities 3 to 8 times lower.
- Treatment
- Herbicide desiccatione0
- Outcome
- weed densitiese0
- Direction
- lowere0
- Value
- 3 to 8 timese0
- Comparator
- mowed or cultivated plotse0
VitisNot reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbicide desiccation was superior to the other methods for weed suppression, with weed densities 3 to 8 times lower than for mowed or cultivated plots.”
t0“growth of grapevines ( Vitis spp.)”
Claim · model-written summary
Vine growth was similar among first-study treatments.
Verbatim
e0“Vine growth was similar among treatments, but the trend was for more shoot growth with lower weed density.”
Claim · model-written summary
Shoot growth tended to rise as weed density fell.
Verbatim
e0“Vine growth was similar among treatments, but the trend was for more shoot growth with lower weed density.”
Claim · model-written summary
Cover crops reduced weed biomass by 27% to 95% versus weedy controls.
- Treatment
- Cover cropse0
- Outcome
- weed biomasse0
- Direction
- reductione0
- Value
- 27% to 95%e0
- Comparator
- weedy control plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops provided 27% to 95% reduction in weed biomass compared to weedy control plots.”
t0“growth of grapevines ( Vitis spp.)”
Claim · model-written summary
Total vine dry mass was highest in weed-free controls.
Verbatim
e0“Total vine dry mass was highest in weed-free control plots, was reduced 54% to 77% in the cover crop plots, and was reduced 81% in the weedy control.”
Claim · model-written summary
Cover crop plots reduced vine dry mass by 54% to 77% relative to weed-free controls.
Verbatim
e0“Total vine dry mass was highest in weed-free control plots, was reduced 54% to 77% in the cover crop plots, and was reduced 81% in the weedy control.”
Claim · model-written summary
Weedy controls reduced vine dry mass by 81% relative to weed-free controls.
Verbatim
e0“Total vine dry mass was highest in weed-free control plots, was reduced 54% to 77% in the cover crop plots, and was reduced 81% in the weedy control.”
Claim · model-written summary
Fall-planted wheat and rye and spring-planted rye gave the highest vine dry mass among cover crop treatments.
Verbatim
e0“Fall-planted wheat and rye and spring-planted rye plots produced the highest vine dry mass among cover crop treatments.”
Claim · model-written summary
Spring-planted rye gave the best combination of weed suppression and vine growth.
Verbatim
e0“Spring-planted rye provided the best combination of weed suppression and vine growth.”
The same questions in other papers
herbicide · weed · VitisPositive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
5 papers more in this group
See all 9 papers →cover crop · weed · VitisResults agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.