Search claims · PlantClaims

Associationobservedreview summarynegativebasis n/a

Claim · model-written summary

Increased weed density in new seedings of alfalfa can decrease alfalfa stand.

Taxon: alfalfaMedicago sativae0
Interactor: weede0weed
Outcome: alfalfa stande0
Direction: decreasee0

Verbatim

e0
“Increased weed density in new seedings of alfalfa can decrease alfalfa stand”
✓ located verbatim in the source · abstract, characters 152–228

Title

G95-1254 Weed Control in Alfalfa

Rob Wilson; G. A. Wicks; Alex Martin Lincoln (University of Nebraska) 1995

Other claims from this paper (4)

Associationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Increasing nutsedge density was associated with a significant linear decrease in seed cotton yield

Taxon: cottonGossypium hirsutumt0
Treatment: Increasing nutsedge densitye0
Interactor: nutsedgee0weed
Outcome: seed cotton yielde0
Direction: decreasee0

Verbatim

t0
“yellow nutsedge (Cyperus esculentus) density on cotton (Gossypium hirsutum)”
✓ located verbatim in the source · title, characters 29–104

e0
“Increasing nutsedge density caused a significant linear decrease in seed cotton yield”
✓ located verbatim in the source · abstract, characters 230–315

Title

Effects of soil moisture and yellow nutsedge (Cyperus esculentus) density on cotton (Gossypium hirsutum)

Jody E. Moffett; William B. McCloskey Weed Science 1998. doi:10.1017/s0043174500090470

Other claims from this paper (9)

Associationobservedoriginal resultnegativesimulated

Claim · model-written summary

A mean density of 24 L4 can cause about 50% production decrease.

Interactor: Leptinotarsa decemlineata SayLeptinotarsa decemlineatae1pest
Outcome: production decreasee0
Direction: decreasee0
Value: 50 %e0

Not reportedTaxon

Verbatim

e0
“a consequent mean density of 24 L4 it can be expected, that this is a level able to cause about a 50 % production decrease”
✓ located verbatim in the source · abstract, characters 430–552

e1
“Colorado beetle ( Leptinotarsa decemlineata Say)”
✓ located verbatim in the source · abstract, characters 39–87

Title

Population dynamic and economic threshold of Leptinotarsa decemlineata (Say) (Col., Chrysomelidae) in Central Italy¹

C. Pucci; M. Dominici; A. Forcina Journal of Applied Entomology 1991. doi:10.1111/j.1439-0418.1991.tb00328.x

Other claims from this paper (3)

Method / resource Pest damage at developmental stages was measured as day-individuals.
Association One egg mass per plant predicts a mean density of 24 L4.
Recommendation The authors suggest a threshold of 25 egg masses on 50 plants per hectare in late May.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The greatest leafy spurge stem density decrease, 72%, followed release of 500 A. nigriscutis beetles per plot.

Taxon: Euphorbia esulaEuphorbia esulae0
Treatment: 500 beetles/plote2
Interactor: A. nigriscutisAphthona nigriscutise1biocontrol_agent
Outcome: stem densitye2
Direction: decreasee2
Value: 72%e2

Not reportedComparator

Verbatim

e0
“Leafy spurge (Euphorbia esula L.)”
✓ located verbatim in the source · abstract, characters 0–33

e1
“A. nigriscutis was released in a dense stand of leafy spurge along a railroad corridor on June 28, 1993”
✓ located verbatim in the source · abstract, characters 296–399

e2
“The greatest stem density decrease was 72% when 500 beetles/plot were released”
✓ located verbatim in the source · abstract, characters 764–842

Title

Aphthona spp. movement and leafy spurge control along railroad right-of-ways

Jeff A. Nelson; Katheryn M. Christianson; Rodney G. Lym 1999

Other claims from this paper (11)

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Main tiller yields of induced plants did not decrease with increasing infection density.

Taxon: BarleyHordeum vulgaret0
Treatment: inducertreatede0
Outcome: yields of main tillerse0
Direction: not decreasede0

Verbatim

e0
“Despite an increasing infection density. yields of main tillers of inducertreated plants were not decreased.”
✓ located verbatim in the source · abstract, characters 495–603

t0
“Barley”
✓ located verbatim in the source · title, characters 78–84

Title

Effects of Induced Resistance on Disease Severity/Yield Relations in Mildewed Barley

H. Kehlenbeck; F. Schönbeck Journal of Phytopathology 1995. doi:10.1111/j.1439-0434.1995.tb00663.x

Other claims from this paper (7)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

No crop or cultivar decreased soil inoculum density.

Taxon: crop speciese0
Outcome: No decrease of inoculum densitye0
Direction: No decreasee0

Verbatim

e0
“No decrease of inoculum density occurred under any crop species or cultivar grown”
✓ located verbatim in the source · abstract, characters 1415–1496

Title

Effects of crop species, crop cultivars and isolates of Verticillium dahliae on the population of microsclerotia in the soil, and consequences for crop yield

L. MOL; J. M. VAN HALTEREN; K. SCHOLTE; et al. Plant Pathology 1996. doi:10.1046/j.1365-3059.1996.d01-125.x

Other claims from this paper (15)

Intervention effect In 1991 potato Element yield was lower with the potato isolate.
Intervention effect In 1991 potato Astarte yield was lower with the faba bean isolate.
Intervention effect In 1991 faba bean yield was lower with the faba bean isolate.
Intervention effect In 1991 sugar beet yield was lower with the faba bean isolate.
Intervention effect Isolate and infestation level did not affect dry matter yield in 1992.
Association Potato Element haulm yield in 1993 was affected by isolate, inoculum density and prior crop.
Association Prior potato Element, Astarte and Mirka crops gave the lowest 1993 yields.
Association At low initial infestation, inoculum density increased significantly after potato Element, Ostara and Astarte.
Association At low initial infestation, inoculum density increased significantly after faba bean.
Association At high infestation the crop effect on inoculum density depended on fungal isolate.
Association Potato cultivars seemed more susceptible to the potato isolate than the faba bean isolate.
Association Faba bean seemed more susceptible to the faba bean isolate than the potato isolate.
Intervention effect Removing flax culms diminished inoculum increase for the high potato isolate treatment.
Association Microsclerotia concentration in potato haulm debris rose with soil inoculum density.
Association Potato haulm dry matter yield fell as soil inoculum density increased.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Higher first-year clopyralid rates did not decrease sowthistle density in year four.

Taxon: perennial sowthistlee0
Treatment: Increasing the rate of clopyralide0
Outcome: perennial sowthistle densitye0
Direction: no_changeinferrede0
Qualifier: in the fourth yeare0

Not reportedComparator

Verbatim

e0
“Increasing the rate of clopyralid in the first year resulted in decreases in perennial sowthistle density in the second and third years following application but not in the fourth year.”
✓ located verbatim in the source · abstract, characters 1074–1259

Title

Perennial sowthistle control with sequential herbicide treatments applied under minimum and zero tillage systems

A. L. Darwent; K. N. Harker; G. W. Clayton Canadian Journal of Plant Science 1998. doi:10.4141/p97-093

Other claims from this paper (10)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrogen fertilizer reduced clover density and stolon biomass on low stocked farmlets.

Taxon: white cloverTrifolium repenst0
Treatment: N fertilisere0
Outcome: clover plant density and stolon biomasse0
Direction: decreasee0

Not reportedComparator

Verbatim

t0
“white clover”
✓ located verbatim in the source · title, characters 47–59

e0
“The decrease in clover content under N fertiliser on the low‐stocked farmlets was confirmed by the decrease in clover plant density and stolon biomass.”
✓ located verbatim in the source · abstract, characters 831–982

Title

Effect of high rates of nitrogen fertiliser on white clover growth, morphology, and nitrogen fixation activity in grazed dairy pasture in northern New Zealand

S. L. Harris; D. A. Clark New Zealand Journal of Agricultural Research 1996. doi:10.1080/00288233.1996.9513173

Other claims from this paper (14)

Intervention effect Low stocking farmlets with 200 kg nitrogen had 10.6% clover content compared with 16.8% without nitrogen.
Intervention effect Low stocking farmlets with 400 kg nitrogen had 2.2% clover content compared with 16.8% without nitrogen.
Mechanism Most clover loss occurred in the first six months when slow growth and nitrogen responses disadvantaged clover.
Mechanism Nitrogen had a smaller effect on clover content with high stocking because boosted pasture was better used.
Intervention effect High stocking farmlets with 200 kg nitrogen had little difference in clover content from unfertilized farmlets.
Intervention effect High stocking farmlets with 400 kg nitrogen had lower clover content of 6.8%.
Intervention effect Clover nitrogen fixation was higher without nitrogen fertilizer than with it.
Intervention effect Application of 400 kg nitrogen significantly affected clover plant morphology.
Intervention effect Clover plants at LS200 did not differ from those at LS0.
Intervention effect LS400 clover plants had lower stolon length and dry weight.
Intervention effect LS400 clover plants developed fewer axillary buds and stolons.
Intervention effect LS400 clover had lower total leaf dry weight and leaves per plant.
Observation Leaf number per stolon and individual leaf dry weight did not differ significantly.
Observation Root number and dry weight per plant did not differ significantly among populations.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Resistance appeared as lower streak density and width.

Taxon: maizeZea mayse1
Interactor: maize streak virusMaize streak virust0pathogen
Outcome: streak density and widthe0
Direction: decreasee0

Verbatim

e0
“The phenotype ofresistance is expressed as a decrease in the streak density and width on the leaves”
✓ located verbatim in the source · abstract, characters 177–276

e1
“line of maize”
✓ located verbatim in the source · abstract, characters 135–148

t0
“maize streak virus”
✓ located verbatim in the source · title, characters 24–42

Title

In situ localisation of maize streak virus in a susceptible cultivar and a resistant line

Laurent Bigarré; Martine Granier; Bernard Reynaud; et al. Agritrop (Cirad) 1994

Other claims from this paper (7)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

In the marigold plot nematode density decreased slowly from late August, whereas it did not decrease in control and strawberry plots.

Taxon: strawberryFragaria ×ananassat0
Treatment: marigold plote1
Interactor: Pratylenchus vulnusPratylenchus vulnust0pest
Outcome: nematode densitye1
Direction: decreasede1
Qualifier: slowlye1
Comparator: control and strawberry plotse1

Verbatim

e1
“from late August the nematode density decreased slowly in the marigold plot but not in the control and strawberry plots”
✓ located verbatim in the source · abstract, characters 872–991

t0
“Pratylenchus vulnus (Nematodes) causing root lesion of strawberry”
✓ located verbatim in the source · title, characters 99–164

Title

Effects of an antagonistic plant, African marigold, Tagetes erecta L. on the population density of Pratylenchus vulnus (Nematodes) causing root lesion of strawberry.

Kazuro OHNO; Toshinobu NAKAMURA; Hiroshi IKEDA Kyushu Plant Protection Research 1992. doi:10.4241/kyubyochu.38.146

Other claims from this paper (7)

“decrease in density”

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