Abstract
Abstract Field experiments were conducted in North Carolina during 2001 and 2002 to evaluate the impact of cultivar and plant population on the incidence of symptoms of tomato spotted wilt virus, which is transmitted primarily by tobacco thrips [Frankliniellafusca (Hinds) (Thysanoptera: Thripidae)]. Treatments included the Virginia market-type cultivars Gregory, NC-V 11, and Perry seeded at in-row plant populations of 7, 13, and 17 plants/m. In these experiments, there was a consistent trend for increased foliar injury from thrips as plant population decreased. Less thrips feeding injury was noted for Gregory and Perry than for NC-V 11. Incidence of visual symptoms of spotted wilt (SW) was recorded from mid-June through mid-September. A plant condition rating was recorded late in the season. Consistent with the results for thrips-induced injury, the percentage of plants infected with SW and the plant condition rating increased as plant population decreased. Gregory had the lowest SW incidence, while NC-V 11 was intermediate between Gregory and the most susceptible Perry. Establishing higher plant densities and planting Gregory rather than NC-V 11 or Perry reduced SW incidence and plant condition rating. Gregory had consistently the highest %ELK (extra large kernels) and %FP (fancy pods) across treatments and locations whereas no definitive trend in market grade characteristics were noted among treatments. In some cases, Perry had a higher incidence of SW, but still had higher pod yields than NC-V 11 with a lower incidence of SW. However, in most cases pod yield correlated with plant condition ratings, and as thrips injury increased, pod yield decreased.
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Claims 10
Claim · model-written summary
Thrips foliar injury increased as peanut plant population decreased.
- Taxon
- Peanut
Arachis hypogaeat0 - Material
- plant populatione0
- Outcome
- foliar injury from thripse0
- Direction
- increasede0
ThripsOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a consistent trend for increased foliar injury from thrips as plant population decreased.”
t0“Peanut”
Claim · model-written summary
Gregory and Perry had less thrips feeding injury than NC-V 11.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Gregory and Perrye0
- Outcome
- thrips feeding injurye0
- Direction
- Lesse0
- Comparator
- NC-V 11e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Less thrips feeding injury was noted for Gregory and Perry than for NC-V 11.”
t0“Peanut”
Claim · model-written summary
Spotted wilt infection percentage increased as plant population decreased.
- Taxon
- PeanutArachis hypogaeat0
- Material
- plant populatione0
- Outcome
- percentage of plants infected with SWe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the percentage of plants infected with SW and the plant condition rating increased as plant population decreased.”
t0“Peanut”
Claim · model-written summary
Plant condition rating increased as plant population decreased.
- Taxon
- PeanutArachis hypogaeat0
- Material
- plant populatione0
- Outcome
- plant condition ratinge0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the percentage of plants infected with SW and the plant condition rating increased as plant population decreased.”
t0“Peanut”
Claim · model-written summary
Gregory had the lowest spotted wilt incidence, NC-V 11 was intermediate, and Perry was most susceptible.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Gregorye0
- Outcome
- SW incidencee0
- Direction
- loweste0
- Comparator
- NC-V 11e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gregory had the lowest SW incidence, while NC-V 11 was intermediate between Gregory and the most susceptible Perry.”
t0“Peanut”
Claim · model-written summary
Greater peanut planting density reduced spotted wilt incidence and plant condition rating.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- higher plant densitiese0
- Outcome
- SW incidence and plant condition ratinge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Establishing higher plant densities and planting Gregory rather than NC-V 11 or Perry reduced SW incidence and plant condition rating.”
t0“Peanut”
Claim · model-written summary
Gregory consistently had the highest percentage extra-large kernels and fancy pods.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Gregorye0
- Outcome
- %ELK (extra large kernels) and %FP (fancy pods)e0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gregory had consistently the highest %ELK (extra large kernels) and %FP (fancy pods) across treatments and locations”
t0“Peanut”
Claim · model-written summary
Perry sometimes had higher spotted wilt incidence but higher pod yield than NC-V 11.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In some cases, Perry had a higher incidence of SW, but still had higher pod yields than NC-V 11 with a lower incidence of SW.”
t0“Peanut”
Claim · model-written summary
Pod yield generally correlated with plant condition ratings.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- pod yielde0
- Comparator
- plant condition ratingse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in most cases pod yield correlated with plant condition ratings”
t0“Peanut”
Claim · model-written summary
Pod yield decreased as thrips injury increased.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- pod yielde0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as thrips injury increased, pod yield decreased.”
t0“Peanut”
The same questions in other papers
density · disease · Arachis hypogaea (peanut)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
5 papers more in this group
See all 9 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.