Short- and long-term effects of azadirachtin A on development and egg production of Rhodnius prolixus

Azadirachtin A was given through a blood meal to 4th-instar larvae and to adult females of Rhodnius prolixus. Development (ecdysis) and egg production were inhibited in a dose-dependent manner. Long-term experiments with subsequent four feedings on azadirachtin-free blood were performed with 4th-ins...

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Bibliographic Details
Published in:Memórias do Instituto Oswaldo Cruz 1990, Vol.85 (1), p.11-15
Main Authors: Garcia, E S, Feder, D, Gomes, J E, Rembold, H
Format: Article
Language:English
Subjects:
Animals
azadirachtin
development
egg production
Female
Hemiptera
Insecticides - pharmacology
Limonins
Oviposition - drug effects
PARASITOLOGY
Reduviidae
Rhodnius - physiology
Rhodnius prolixus
Triterpenes - pharmacology
TROPICAL MEDICINE
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Summary:Azadirachtin A was given through a blood meal to 4th-instar larvae and to adult females of Rhodnius prolixus. Development (ecdysis) and egg production were inhibited in a dose-dependent manner. Long-term experiments with subsequent four feedings on azadirachtin-free blood were performed with 4th-instar larvae and with adult females. Only in the low-dose azadirachtin larval groups (0.01 and 0.1 microgram/ml of blood), development was partially restored; after a single 1.0 microgram/ml treatment about 50% of the treated larvae were still alive 120 days later without any adult emergence. Similarly fed females had a dose-dependent lower survival and egg deposition rate. The results are discussed in relation to the mode of azadirachtin A action.
ISSN:0074-0276
1678-8060
0074-0276
1678-8060
DOI:10.1590/S0074-02761990000100002