Abstract
Abstract Mated 3‐day‐old female boll weevils, Anthonomus grandis grandis Boheman, reared from field‐infested cotton ( Gossypium hirsutum L.) squares were topically treated with an estimated LD 50 of malathion (2 μg) to assess its effects on fecundity, oviposition, and body fat condition. Two different food sources, cotton squares and artificial diet, were assessed in malathion‐treated and nontreated (control) weevils. The LD 50 caused ∼50% mortality in the square‐fed malathion treatment, but the artificial diet‐fed malathion‐treated weevils were less susceptible. LD 50 survivors fed on the squares produced ≥ 9 times more chorionated eggs in the ovaries and oviposited ≥ 19‐fold more than survivors fed artificial diet, regardless of the malathion treatment. Boll weevils that survived a 2 μg LD 50 malathion and also fed squares were ∼4.5‐fold leaner than diet‐fed weevils. Our findings demonstrate that non‐resistant boll weevils surviving a sublethal dose of malathion will reproduce without any delay or significant loss in fecundity, and the food source for which boll weevils are maintained when conducting these assays will directly affect the results. The significance of these findings and how they are related to the final stages of eradicating the boll weevil from the US are discussed.
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Claims 5
Claim · model-written summary
Boll weevils surviving a sublethal malathion dose reproduced without delay or significant loss in fecundity compared with nontreated weevils.
- Taxon
- Gossypium hirsutum
Gossypium hirsutume0 - Treatment
- malathione1
- Interactor
- boll weevil
Anthonomus grandist0pest - Outcome
- fecunditye6
- Direction
- no_changeinferrede6
- Comparator
- nontreated (control) weevilse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sublethal effects of malathion on boll weevil”
e0“cotton ( Gossypium hirsutum L.) squares”
e1“topically treated with an estimated LD 50 of malathion”
e6“will reproduce without any delay or significant loss in fecundity”
e7“nontreated (control) weevils”
Claim · model-written summary
Boll weevils that survived the LD50 and fed on cotton squares produced at least nine times more chorionated eggs than those fed artificial diet.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- fed on the squarese2
- Interactor
- boll weevilAnthonomus grandist0pest
- Outcome
- chorionated eggs in the ovariese2
- Direction
- moree2
- Value
- ≥ 9 timese2
- Comparator
- artificial diete3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sublethal effects of malathion on boll weevil”
e0“cotton ( Gossypium hirsutum L.) squares”
e2“LD 50 survivors fed on the squares produced ≥ 9 times more chorionated eggs in the ovaries”
e3“oviposited ≥ 19‐fold more than survivors fed artificial diet”
Claim · model-written summary
Boll weevil survivors fed on cotton squares oviposited at least 19-fold more than those fed artificial diet.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- fed on the squarese2
- Interactor
- boll weevilAnthonomus grandist0pest
- Outcome
- ovipositede3
- Direction
- moree3
- Value
- ≥ 19‐folde3
- Comparator
- artificial diete3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sublethal effects of malathion on boll weevil”
e0“cotton ( Gossypium hirsutum L.) squares”
e2“LD 50 survivors fed on the squares produced ≥ 9 times more chorionated eggs in the ovaries”
e3“oviposited ≥ 19‐fold more than survivors fed artificial diet”
Claim · model-written summary
Boll weevils that survived malathion and fed on squares were about 4.5-fold leaner than diet-fed weevils.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- fed squarese4
- Interactor
- boll weevilAnthonomus grandist0pest
- Outcome
- leanere4
- Direction
- lowerinferrede4
- Value
- ∼4.5‐folde4
- Comparator
- diet‐fed weevilse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sublethal effects of malathion on boll weevil”
e0“cotton ( Gossypium hirsutum L.) squares”
e4“also fed squares were ∼4.5‐fold leaner than diet‐fed weevils”
Claim · model-written summary
The food source on which boll weevils are maintained is expected to directly affect assay results.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- food sourcee5
- Interactor
- boll weevilAnthonomus grandist0pest
- Outcome
- resultse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sublethal effects of malathion on boll weevil”
e0“cotton ( Gossypium hirsutum L.) squares”
e5“the food source for which boll weevils are maintained when conducting these assays will directly affect the results”
The same questions in other papers
malathion · Anthonomus grandis · Gossypium hirsutum (cotton)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
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.