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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Published inMemórias do Instituto Oswaldo Cruz Vol. 85; no. 1; pp. 11 - 15
Main Authors Garcia, E S, Feder, D, Gomes, J E, Rembold, H
Format Journal Article
LanguageEnglish
Portuguese
Published Brazil Instituto Oswaldo Cruz, Ministério da Saúde 1990
Fundação Oswaldo Cruz (FIOCRUZ)
Subjects
Animals
azadirachtin
development
egg production
Female
Hemiptera
Insecticides - pharmacology
Limonins
Oviposition - drug effects
PARASITOLOGY
Reduviidae
Rhodnius - physiology
Rhodnius prolixus
Triterpenes - pharmacology
TROPICAL MEDICINE
azadirachtin
egg production
development
Rhodnius prolixus
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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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0074-0276
1678-8060
1678-8060
0074-0276
DOI:10.1590/S0074-02761990000100002