Abstract
Understanding the compensatory responses of crops to pest damage is important in developing pest thresholds. Compensation for pest damage in crops can occur at the plant level, where the architecture, growth dynamics and allocation patterns of damaged plants are altered, allowing them to recover or, at the crop level, where differential damage between plants may alter plant-to-plant interactions. We investigated growth and yield of cotton (Gossypium hirsutum L.) following non-uniform manual defoliation of seedlings. This partially replicates real pest damage and is valuable in understanding crop-level responses to damage because it can be inflicted precisely. Damage distributions included damaging 0, 25, 50, 75 or 100% of the plants. Damage intensity for the damaged plants was varied by removing 100 or 75% of each true leaf when plants had two, four and six true leaves. At the crop level, yield loss increased as the proportion of plants damaged and intensity of damage per damaged plant increased. Neighbour interactions occurred; undamaged plants with damaged neighbours grew larger and yielded better than undamaged plants with undamaged neighbours, while the converse applied for damaged plants with undamaged neighbours. Neighbour interactions were influenced by the intensity of damage and were stronger when 100% of the leaf area was removed than when 75% was removed. At the crop level, when compared with yield estimates based on yield of plants from uniformly damaged or undamaged plots, these interactions resulted in higher yield than expected (+8%). This suggests that damage distribution may have to be considered in studies where artificial or real pest damage is inflicted uniformly on plants.
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Claims 8
Claim · model-written summary
Crop yield loss increased with the proportion of damaged plants.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- proportion of plants damagede0
- Outcome
- yield losse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield loss increased as the proportion of plants damaged and intensity of damage per damaged plant increased”
e1“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Crop yield loss increased with defoliation intensity.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- intensity of damage per damaged plante0
- Outcome
- yield losse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield loss increased as the proportion of plants damaged and intensity of damage per damaged plant increased”
e1“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Undamaged plants grew larger beside damaged neighbors than beside undamaged neighbors.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- damaged neighbourse0
- Outcome
- grew largere0
- Direction
- largere0
- Comparator
- undamaged plants with undamaged neighbourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“undamaged plants with damaged neighbours grew larger and yielded better than undamaged plants with undamaged neighbours”
e1“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Undamaged plants yielded better beside damaged neighbors than beside undamaged neighbors.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- damaged neighbourse0
- Outcome
- yielded bettere0
- Direction
- bettere0
- Comparator
- undamaged plants with undamaged neighbourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“undamaged plants with damaged neighbours grew larger and yielded better than undamaged plants with undamaged neighbours”
e1“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Damaged plants grew less beside undamaged neighbors.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- damaged plants with undamaged neighbourse0
- Outcome
- the conversee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the converse applied for damaged plants with undamaged neighbours”
e1“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Neighbor interactions were stronger at complete than 75% leaf removal.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- 100% of the leaf area was removede0
- Outcome
- Neighbour interactionse0
- Direction
- strongere0
- Comparator
- 75% was removede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neighbour interactions were influenced by the intensity of damage and were stronger when 100% of the leaf area was removed than when 75% was removed”
e1“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Neighbor interactions yielded 8% more crop yield than expected from uniform plots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these interactions resulted in higher yield than expected (+8%)”
e1“yield estimates based on yield of plants from uniformly damaged or undamaged plots”
e2“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Damage distribution may need consideration in studies with uniform artificial or real pest damage.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- damage distribution may have to be considerede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“damage distribution may have to be considered in studies where artificial or real pest damage is inflicted uniformly on plants”
e1“cotton (Gossypium hirsutum L.)”
The same questions in other papers
competition · yield · Gossypium hirsutum (cotton)Results differ
1 paper in the same direction as this paper · 14 in the opposite direction
- negative
- negative
- negative
12 papers more in this group
See all 16 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.