Abstract
BACKGROUND: Neonicotinoid seed treatments suppress populations of pest insects efficiently and can enhance crop growth, but they may have negative effects on beneficial arthropods. We evaluated the effects of either imidacloprid or thiamethoxam on the abundances of a sucking pest, the cotton leafhopper (Amrasca devastans), and its arthropod predators under field conditions. We also evaluated the impact of seed treatment on transgenic cotton plant growth, with pests and natural enemies present or absent. RESULTS: Imidacloprid and thiamethoxam reduced pest abundance, with greater effects when dosages were higher. Treatment at recommended doses delayed the pest in reaching the economic damage threshold by around 10-15 days (thiamethoxam) and 20 days (imidacloprid). Recommended doses also enhanced plant growth under all tested conditions; growth is affected directly as well as via pest suppression. Neonicotinoid applications reduced abundance of beneficial arthropods, with lower populations after higher doses, but negative effects of imidacloprid were not apparent unless the manufacturer-recommended dose was exceeded. CONCLUSION: Imidacloprid applied at the recommended dose of 5 g kg(-1) seed is effective against A. devastans and appears to be safer than thiamethoxam for natural enemies, and also enhances plant growth directly. We caution, however, that possible sublethal negative effects on individual beneficial arthropods were not evaluated. © 2015 Society of Chemical Industry.
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Claims 11
Claim · model-written summary
Imidacloprid reduced cotton leafhopper abundance in cotton.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- Imidaclopride1
- Interactor
- Amrasca devastanse0pest
- Outcome
- pest abundancee1
- Direction
- reducede1
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e0“the abundances of a sucking pest, the cotton leafhopper (Amrasca devastans), and its arthropod predators under field conditions”
e1“Imidacloprid and thiamethoxam reduced pest abundance, with greater effects when dosages were higher”
Claim · model-written summary
Thiamethoxam reduced cotton leafhopper abundance in cotton.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- thiamethoxame1
- Interactor
- Amrasca devastanse0pest
- Outcome
- pest abundancee1
- Direction
- reducede1
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e0“the abundances of a sucking pest, the cotton leafhopper (Amrasca devastans), and its arthropod predators under field conditions”
e1“Imidacloprid and thiamethoxam reduced pest abundance, with greater effects when dosages were higher”
Claim · model-written summary
Pest abundance reduction by the neonicotinoids was greater at higher dosages.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- dosages were highere1
- Interactor
- Amrasca devastanse0pest
- Outcome
- pest abundancee1
- Direction
- greater effectse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e0“the abundances of a sucking pest, the cotton leafhopper (Amrasca devastans), and its arthropod predators under field conditions”
e1“Imidacloprid and thiamethoxam reduced pest abundance, with greater effects when dosages were higher”
Claim · model-written summary
Thiamethoxam at recommended doses delayed the cotton leafhopper reaching the economic damage threshold by 10-15 days.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- recommended dosese2
- Interactor
- Amrasca devastanse0pest
- Compound
- thiamethoxame2
- Outcome
- the pest in reaching the economic damage thresholde2
- Direction
- delayede2
- Value
- 10-15 dayse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e0“the abundances of a sucking pest, the cotton leafhopper (Amrasca devastans), and its arthropod predators under field conditions”
e2“Treatment at recommended doses delayed the pest in reaching the economic damage threshold by around 10-15 days (thiamethoxam) and 20 days (imidacloprid)”
Claim · model-written summary
Imidacloprid at recommended doses delayed the cotton leafhopper reaching the economic damage threshold by 20 days.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- recommended dosese2
- Interactor
- Amrasca devastanse0pest
- Compound
- imidaclopride2
- Outcome
- the pest in reaching the economic damage thresholde2
- Direction
- delayede2
- Value
- 20 dayse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e0“the abundances of a sucking pest, the cotton leafhopper (Amrasca devastans), and its arthropod predators under field conditions”
e2“Treatment at recommended doses delayed the pest in reaching the economic damage threshold by around 10-15 days (thiamethoxam) and 20 days (imidacloprid)”
Claim · model-written summary
Recommended doses enhanced cotton plant growth under all tested conditions.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Recommended dosese3
- Outcome
- plant growthe3
- Direction
- enhancede3
- Qualifier
- under all tested conditionse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e3“Recommended doses also enhanced plant growth under all tested conditions; growth is affected directly as well as via pest suppression”
Claim · model-written summary
Enhanced cotton growth under the seed treatment is affected directly as well as via pest suppression (authors interpretation).
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- plant growthe3
- Qualifier
- via pest suppressione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e3“Recommended doses also enhanced plant growth under all tested conditions; growth is affected directly as well as via pest suppression”
Claim · model-written summary
Neonicotinoid applications reduced abundance of beneficial arthropods, with lower populations after higher doses.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Neonicotinoid applicationse4
- Interactor
- beneficial arthropodse4biocontrol_agent
- Outcome
- abundance of beneficial arthropodse4
- Direction
- reducede4
- Qualifier
- lower populations after higher dosese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e4“Neonicotinoid applications reduced abundance of beneficial arthropods, with lower populations after higher doses”
Claim · model-written summary
Negative effects of imidacloprid on beneficial arthropods were not apparent unless the manufacturer-recommended dose was exceeded.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- imidaclopride5
- Interactor
- beneficial arthropodse4biocontrol_agent
- Outcome
- negative effects of imidaclopride5
- Comparator
- manufacturer-recommended dosee5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e4“Neonicotinoid applications reduced abundance of beneficial arthropods, with lower populations after higher doses”
e5“negative effects of imidacloprid were not apparent unless the manufacturer-recommended dose was exceeded”
Claim · model-written summary
Imidacloprid applied at the recommended dose of 5 g kg(-1) seed is recommended as effective against A. devastans.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- applied at the recommended dose of 5 g kg(-1) seede6
- Interactor
- A. devastanse6pest
- Compound
- Imidaclopride6
- Outcome
- effective against A. devastanse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e6“Imidacloprid applied at the recommended dose of 5 g kg(-1) seed is effective against A. devastans and appears to be safer than thiamethoxam for natural enemies”
Claim · model-written summary
Imidacloprid appears safer than thiamethoxam for natural enemies.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Imidaclopride6
- Interactor
- natural enemiese6biocontrol_agent
- Outcome
- natural enemiese6
- Direction
- safere6
- Comparator
- thiamethoxame6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“neonicotinoid seed treatment of cotton”
e6“Imidacloprid applied at the recommended dose of 5 g kg(-1) seed is effective against A. devastans and appears to be safer than thiamethoxam for natural enemies”
The same questions in other papers
imidacloprid · molecular: metabolites · Gossypium hirsutum (cotton)Positive and negative results
1 in the opposite direction
- positive
thiamethoxam · pest · Gossypium hirsutum (cotton)Positive and negative results
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- negative
- positive
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10 papers more in this group
See all 14 papers →imidacloprid · pest · Gossypium hirsutum (cotton)Positive and negative results
26 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- negative
28 papers more in this group
See all 32 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.