Abstract
Ovipositional responses of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) to hexane extracts of leaves of two maize (Zea mays L.) cultivars, one resistant (Kisan) and one susceptible (Basilocal), were studied in two-choice bioassays. Gravid females laid a significantly higher percentage of eggs on substrates smeared with extract of Basilocal leaves (HEBL) (69%) than on those smeared with extracts of Kisan leaves (HEKL) (31%). Several chemicals were isolated from HEKL, three of which were characterized as dotriacontanol, heptadecanol, and nonadecanol. These chemicals were either absent or were present in very small amounts in HEBL, but in HEKL they were detected in much larger amounts. Each isolated chemical was tested for its effect on C. partellus oviposition in two-choice bioassays. Maximum ovipositional deterrence (90%) was observed for the compound MR-22a, followed in decreasing order by nonadecanol, MR-7, and heptadecanol. The identity of the remaining compounds is being investigated. The results indicate that the relative resistance of Kisan maize compared to Basilocal is partly due to the presence of certain ovipositional deterrents in its leaves.
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Claims 5
Claim · model-written summary
Chilo partellus females laid a significantly higher percentage of eggs on substrates smeared with extract of the susceptible Basilocal maize leaves than on extract of the resistant Kisan leaves (69% vs 31%).
- Material
- Basilocale1
- Treatment
- extract of Basilocal leavese1
- Interactor
- Chilo partellus
_Figure_27c.jpg?width=60)
Chilo partelluse0pest - Outcome
- percentage of eggse1
- Direction
- highere1
- Value
- 69%e1
- Comparator
- extracts of Kisan leavese1
- Setting
- two-choice bioassayse0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_Figure_27c.jpg?width=500)
Verbatim
e0“Ovipositional responses of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) to hexane extracts of leaves of two maize (Zea mays L.) cultivars, one resistant (Kisan) and one susceptible (Basilocal), were studied in two-choice bioassays”
e1“Gravid females laid a significantly higher percentage of eggs on substrates smeared with extract of Basilocal leaves (HEBL) (69%) than on those smeared with extracts of Kisan leaves (HEKL) (31%)”
Claim · model-written summary
Dotriacontanol, heptadecanol and nonadecanol were absent or in very small amounts in Basilocal leaf extract but in much larger amounts in Kisan leaf extract.
- Material
- Kisane0
- Compound
- dotriacontanol, heptadecanol, and nonadecanole3
- Outcome
- amountse2
- Direction
- much largere2
- Comparator
- HEBLe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ovipositional responses of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) to hexane extracts of leaves of two maize (Zea mays L.) cultivars, one resistant (Kisan) and one susceptible (Basilocal), were studied in two-choice bioassays”
e2“These chemicals were either absent or were present in very small amounts in HEBL, but in HEKL they were detected in much larger amounts”
e3“Several chemicals were isolated from HEKL, three of which were characterized as dotriacontanol, heptadecanol, and nonadecanol”
Claim · model-written summary
Compound MR-22a gave the maximum ovipositional deterrence (90%) of Chilo partellus.
- Treatment
- compound MR-22ae4
- Interactor
- Chilo partellusChilo partelluse0pest
- Compound
- MR-22ae4
- Outcome
- ovipositional deterrencee4
- Direction
- Maximume4
- Value
- 90%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ovipositional responses of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) to hexane extracts of leaves of two maize (Zea mays L.) cultivars, one resistant (Kisan) and one susceptible (Basilocal), were studied in two-choice bioassays”
e4“Maximum ovipositional deterrence (90%) was observed for the compound MR-22a, followed in decreasing order by nonadecanol, MR-7, and heptadecanol”
Claim · model-written summary
Ovipositional deterrence followed in decreasing order by nonadecanol, MR-7 and heptadecanol, after compound MR-22a.
- Treatment
- nonadecanol, MR-7, and heptadecanole4
- Interactor
- Chilo partellusChilo partelluse0pest
- Outcome
- ovipositional deterrencee4
- Direction
- in decreasing ordere4
- Comparator
- compound MR-22ae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ovipositional responses of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) to hexane extracts of leaves of two maize (Zea mays L.) cultivars, one resistant (Kisan) and one susceptible (Basilocal), were studied in two-choice bioassays”
e4“Maximum ovipositional deterrence (90%) was observed for the compound MR-22a, followed in decreasing order by nonadecanol, MR-7, and heptadecanol”
Claim · model-written summary
The relative resistance of Kisan maize compared with Basilocal is partly due to ovipositional deterrents in its leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ovipositional responses of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) to hexane extracts of leaves of two maize (Zea mays L.) cultivars, one resistant (Kisan) and one susceptible (Basilocal), were studied in two-choice bioassays”
e5“The results indicate that the relative resistance of Kisan maize compared to Basilocal is partly due to the presence of certain ovipositional deterrents in its leaves”
The same questions in other papers
botanical · Chilo partellus · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
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See all 12 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.