Abstract
Plant growth and yield responses to carbon dioxide (CO2) enrichment are well established. Much less is known of the response of arthropod pests to CO2 enrichment. Reproductive response of twospotted spider mites (Tetranychus urticae Koch) on white clover (Trifolium repens L.) to a range of CO2 concentrations was measured. The CO2 treatments were applied for 24 h d−1 at ≈395, 484, 570, 657, and 748 &mgr;LL−1 on the 14 d before and 26–27 d after infestation with mites. Eggs, larvae, nymphs, and adult mites were removed from leaves and counted 27–29 d after infestation. Leaf area and weight were measured, and leaves were analyzed to measure structural and nonstructural carbohydrates, N, amino acids and digestibility. Carbon dioxide enrichment caused linear increases in plant growth and foliar nonstructural carbohydrates, but caused linear decreases in foliar N. Carbon dioxide enrichment significantly increased the rate of mite reproduction on both clover clones. Correlations between mite population increase were significantly positive for foliar nonstructural carbohydrates and significantly negative for foliar N. Concentrations of ambient CO2 expected in the 21st century may increase the risk of mite population damage on some plant species.
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Claims 7
Claim · model-written summary
Carbon dioxide enrichment increased plant growth linearly.
- Taxon
- white clover
Trifolium repense1 - Treatment
- Carbon dioxide enrichmente0
- Outcome
- plant growthe0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide enrichment caused linear increases in plant growth”
e1“twospotted spider mites (Tetranychus urticae Koch) on white clover (Trifolium repens L.)”
Claim · model-written summary
Carbon dioxide enrichment increased foliar nonstructural carbohydrates linearly.
- Taxon
- white cloverTrifolium repense1
- Treatment
- Carbon dioxide enrichmente0
- Outcome
- foliar nonstructural carbohydratese0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide enrichment caused linear increases in plant growth and foliar nonstructural carbohydrates”
e1“twospotted spider mites (Tetranychus urticae Koch) on white clover (Trifolium repens L.)”
Claim · model-written summary
Carbon dioxide enrichment decreased foliar N linearly.
- Taxon
- white cloverTrifolium repense1
- Treatment
- Carbon dioxide enrichmente0
- Outcome
- foliar Ne0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide enrichment caused linear increases in plant growth and foliar nonstructural carbohydrates, but caused linear decreases in foliar N”
e1“twospotted spider mites (Tetranychus urticae Koch) on white clover (Trifolium repens L.)”
Claim · model-written summary
Carbon dioxide enrichment significantly increased mite reproduction on both clover clones.
- Taxon
- white cloverTrifolium repense1
- Treatment
- Carbon dioxide enrichmente0
- Interactor
- twospotted spider mitese1pest
- Outcome
- mite reproductione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide enrichment significantly increased the rate of mite reproduction on both clover clones”
e1“twospotted spider mites (Tetranychus urticae Koch) on white clover (Trifolium repens L.)”
Claim · model-written summary
Mite population increase correlated positively with foliar nonstructural carbohydrates.
- Taxon
- white cloverTrifolium repense1
- Interactor
- twospotted spider mitese1pest
- Compound
- foliar nonstructural carbohydratese0
- Outcome
- mite population increasee0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlations between mite population increase were significantly positive for foliar nonstructural carbohydrates”
e1“twospotted spider mites (Tetranychus urticae Koch) on white clover (Trifolium repens L.)”
Claim · model-written summary
Mite population increase correlated negatively with foliar N.
- Taxon
- white cloverTrifolium repense1
- Interactor
- twospotted spider mitese1pest
- Compound
- foliar Ne0
- Outcome
- mite population increasee0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlations between mite population increase were significantly positive for foliar nonstructural carbohydrates and significantly negative for foliar N”
e1“twospotted spider mites (Tetranychus urticae Koch) on white clover (Trifolium repens L.)”
Claim · model-written summary
Future ambient CO2 may increase mite damage risk on some plants.
Verbatim
e0“Concentrations of ambient CO2 expected in the 21st century may increase the risk of mite population damage on some plant species”
The same questions in other papers
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- negative
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- positive
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10 papers more in this group
See all 14 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.