Azadirachtin, ecdysteroids and ecdysis in Locusta migratoria

AJ Mordue, KA Evans, M Charlet

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

1. The injection of azadirachtin into eight-day-old 5th instar nymphs of Locusta migratoria elicits different morphological effects dependent upon the timing of the injection relative to the major haemolymph ecdysteroid peak.
2. Ecdysteroid levels can be drastically reduced, delayed and extended or not significantly affected by azadirachtin treatment dependent upon the timing of injection.
3. Air swallowing to inflate the gut during the moult is significantly impaired in azadirachtin-treated insects resulting in both a reduced rate of inflation and a reduction in total air volume.
4. The significance of azadirachtin treatment to the attainment of a “critical body mass”, the release of eclosion hormone and successful ecdysis is discussed.
Original languageEnglish
Pages (from-to)297-301
JournalComparative Biochemistry and Physiology. Part C: Comparative
Volume85
Issue number2
DOIs
Publication statusPrint publication - 1986
Externally publishedYes

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Locusta migratoria
Ecdysteroids
Molting
Aerophagy
Nymph
Injections
Hemolymph
Economic Inflation
Insects
Air
azadirachtin
Therapeutics

Cite this

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title = "Azadirachtin, ecdysteroids and ecdysis in Locusta migratoria",
abstract = "1. The injection of azadirachtin into eight-day-old 5th instar nymphs of Locusta migratoria elicits different morphological effects dependent upon the timing of the injection relative to the major haemolymph ecdysteroid peak.2. Ecdysteroid levels can be drastically reduced, delayed and extended or not significantly affected by azadirachtin treatment dependent upon the timing of injection.3. Air swallowing to inflate the gut during the moult is significantly impaired in azadirachtin-treated insects resulting in both a reduced rate of inflation and a reduction in total air volume.4. The significance of azadirachtin treatment to the attainment of a “critical body mass”, the release of eclosion hormone and successful ecdysis is discussed.",
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Azadirachtin, ecdysteroids and ecdysis in Locusta migratoria. / Mordue, AJ; Evans, KA; Charlet, M.

In: Comparative Biochemistry and Physiology. Part C: Comparative, Vol. 85, No. 2, 1986, p. 297-301.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Azadirachtin, ecdysteroids and ecdysis in Locusta migratoria

AU - Mordue, AJ

AU - Evans, KA

AU - Charlet, M

PY - 1986

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N2 - 1. The injection of azadirachtin into eight-day-old 5th instar nymphs of Locusta migratoria elicits different morphological effects dependent upon the timing of the injection relative to the major haemolymph ecdysteroid peak.2. Ecdysteroid levels can be drastically reduced, delayed and extended or not significantly affected by azadirachtin treatment dependent upon the timing of injection.3. Air swallowing to inflate the gut during the moult is significantly impaired in azadirachtin-treated insects resulting in both a reduced rate of inflation and a reduction in total air volume.4. The significance of azadirachtin treatment to the attainment of a “critical body mass”, the release of eclosion hormone and successful ecdysis is discussed.

AB - 1. The injection of azadirachtin into eight-day-old 5th instar nymphs of Locusta migratoria elicits different morphological effects dependent upon the timing of the injection relative to the major haemolymph ecdysteroid peak.2. Ecdysteroid levels can be drastically reduced, delayed and extended or not significantly affected by azadirachtin treatment dependent upon the timing of injection.3. Air swallowing to inflate the gut during the moult is significantly impaired in azadirachtin-treated insects resulting in both a reduced rate of inflation and a reduction in total air volume.4. The significance of azadirachtin treatment to the attainment of a “critical body mass”, the release of eclosion hormone and successful ecdysis is discussed.

U2 - 10.1016/0742-8413(86)90197-0

DO - 10.1016/0742-8413(86)90197-0

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JO - Comparative biochemistry and physiology. C: Comparative pharmacology

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