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.
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 language | English |
|---|---|
| Pages (from-to) | 297-301 |
| Journal | Comparative Biochemistry and Physiology. Part C: Comparative |
| Volume | 85 |
| Issue number | 2 |
| DOIs | |
| Publication status | Print publication - 1986 |
| Externally published | Yes |