Abstract
Oils extracted from sceds of custard-apple (Annona squamosa L.) and the Indian neem tree (Azadirachta indica A. Juss) were found to be highly effective in reducing the survival of a leafhopper N. virescens (Distant) and its transmission of the rice tungro virus (RTV). Mean percentages of insect survival on and RTV transmission to plants sprayed with oils at 5, 10, 20, 30, or 50% concentrations were significantly less than for control plants sprayed with water containing 0.1% Teepol liquid detergent. The higher the oil concentration, the lower was the insect survival and RTV transmission; however, after 3 and 2 days, respectively, differences among oil treatments were not significant. The insect failed to survive and transmit RTV to oil-sprayed plants beyond 3 days of exposure, but on control plants, the insect lived for more than 20 days and transmitted RTV up to 5 days. Thus, custard-apple oil and neem oil possess potential for suppression of RTV transmission by the vector.
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Claims 7
Claim · model-written summary
Custard-apple seed oil reduced leafhopper survival relative to detergent-water controls.
- Taxon
- Rice
Oryza sativat0 - Treatment
- custard-applee0
- Interactor
- N. virescens
_UGA5190052.jpg?width=60)
Nephotettix virescense0pest - Outcome
- survival of a leafhopper N. virescense0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_UGA5190052.jpg?width=500)
Verbatim
e0“Oils extracted from sceds of custard-apple (Annona squamosa L.) and the Indian neem tree (Azadirachta indica A. Juss) were found to be highly effective in reducing the survival of a leafhopper N. virescens (Distant) and its transmission of the rice tungro virus (RTV).”
t0“Rice”
Claim · model-written summary
Neem seed oil reduced leafhopper survival.
- Taxon
- RiceOryza sativat0
- Treatment
- Indian neem treee0
- Interactor
- N. virescensNephotettix virescense0pest
- Outcome
- survival of a leafhopper N. virescense0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oils extracted from sceds of custard-apple (Annona squamosa L.) and the Indian neem tree (Azadirachta indica A. Juss) were found to be highly effective in reducing the survival of a leafhopper N. virescens (Distant) and its transmission of the rice tungro virus (RTV).”
t0“Rice”
Claim · model-written summary
Custard-apple oil reduced rice tungro virus transmission.
- Taxon
- RiceOryza sativat0
- Treatment
- custard-applee0
- Interactor
- rice tungro viruse0pathogen
- Second interactor
- N. virescensNephotettix virescense0pest
- Outcome
- transmission of the rice tungro virus (RTV)e0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oils extracted from sceds of custard-apple (Annona squamosa L.) and the Indian neem tree (Azadirachta indica A. Juss) were found to be highly effective in reducing the survival of a leafhopper N. virescens (Distant) and its transmission of the rice tungro virus (RTV).”
t0“Rice”
Claim · model-written summary
Neem oil reduced rice tungro virus transmission.
- Taxon
- RiceOryza sativat0
- Treatment
- Indian neem treee0
- Interactor
- rice tungro viruse0pathogen
- Second interactor
- N. virescensNephotettix virescense0pest
- Outcome
- transmission of the rice tungro virus (RTV)e0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oils extracted from sceds of custard-apple (Annona squamosa L.) and the Indian neem tree (Azadirachta indica A. Juss) were found to be highly effective in reducing the survival of a leafhopper N. virescens (Distant) and its transmission of the rice tungro virus (RTV).”
t0“Rice”
Claim · model-written summary
Insect survival and virus transmission declined as oil concentration rose.
- Taxon
- RiceOryza sativat0
- Treatment
- oil concentratione0
- Interactor
- Nephotettix virescensNephotettix virescenst0peste0
- Outcome
- insect survival and RTV transmissione0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher the oil concentration, the lower was the insect survival and RTV transmission”
t0“Nephotettix virescens (Homoptera: Cicadellidae) and on Rice”
Claim · model-written summary
After 3 and 2 days, respectively, differences among oil treatments were not significant.
- Taxon
- RiceOryza sativat0
- Outcome
- differences among oil treatmentse0
- Value
- 3 and 2 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 3 and 2 days, respectively, differences among oil treatments were not significant.”
t0“Rice”
Claim · model-written summary
The insect neither survived nor transmitted RTV beyond 3 days on oil-sprayed plants.
- Taxon
- RiceOryza sativat0
- Treatment
- oil-sprayed plantse0
- Interactor
- Nephotettix virescensNephotettix virescenst0peste0
- Outcome
- failed to survive and transmit RTVe0
- Value
- 3 dayse0
- Comparator
- control plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The insect failed to survive and transmit RTV to oil-sprayed plants beyond 3 days of exposure, but on control plants, the insect lived for more than 20 days and transmitted RTV up to 5 days.”
t0“Nephotettix virescens (Homoptera: Cicadellidae) and on Rice”
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See all 10 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.