Abstract
The objective of this study was to identify a sweetpotato canopy type ideally suited to suppress weed growth. With this knowledge, breeders could select sweetpotatoes that require less weed control. Diverse canopy types, ranging from upright, short-internode bunch types to long-internode trailing types, were compared in a split-plot design (hand-weeded and weed treatments). We also included lines with deeply lobed leaves (palmate) and more entire-leaf types. Our results show no significant differences between lines for total ground surface area covered after 6 weeks of growth, no differences in weed dry weight at harvest and few differences in canopy dry weight at harvest. Total ground surface area covered correlated positively with total yield, and weed dry weight correlated negatively to total yield. We were unable to identify individual lines that yield better when pressured with weeds compared to the hand-weeded control, but we were able to identify lines that yield poorly when pressured with weeds compared to the hand-weeded control. These results demonstrate the difficulty in categorically identifying a superior canopy.
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Claims 7
Claim · model-written summary
Lines did not differ significantly in ground area covered at six weeks.
- Taxon
- sweetpotatoes
_Flower.jpg?width=60)
Ipomoea batatast0 - Outcome
- total ground surface area coverede0
- Direction
- no significant differencese0
- Comparator
- between linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“no significant differences between lines for total ground surface area covered after 6 weeks of growth”
t0“SWEETPOTATOES”
Claim · model-written summary
Lines did not differ in weed dry weight at harvest.
Verbatim
e0“no differences in weed dry weight at harvest”
t0“SWEETPOTATOES”
Claim · model-written summary
Lines had few differences in canopy dry weight at harvest.
Verbatim
e0“few differences in canopy dry weight at harvest”
t0“SWEETPOTATOES”
Claim · model-written summary
Ground cover correlated positively with total yield.
- Taxon
- SWEETPOTATOESt0
- Outcome
- total yielde0
- Direction
- positivelye0
- Qualifier
- Total ground surface area coverede0
Not reportedMaterialOrgan / stageComparatorSetting
Verbatim
e0“Total ground surface area covered correlated positively with total yield”
t0“SWEETPOTATOES”
Claim · model-written summary
Weed dry weight correlated negatively with total yield.
Verbatim
e0“weed dry weight correlated negatively to total yield”
t0“SWEETPOTATOES”
Claim · model-written summary
No line yielded better under weed pressure than hand weeded control.
Verbatim
e0“unable to identify individual lines that yield better when pressured with weeds compared to the hand-weeded control”
t0“SWEETPOTATOES”
Claim · model-written summary
Some lines yielded poorly under weed pressure relative to hand weeding.
Verbatim
e0“identify lines that yield poorly when pressured with weeds compared to the hand-weeded control”
t0“SWEETPOTATOES”