Demonstration of a proallatotoxin-sensitive period in 4th-instar nymphs of Rhodnius prolixus.
1. Topical application of the proallatotoxin ethoxyprecocene II (60 micrograms/nymph) to 4th-instar nymphs of Rhodnius prolixus at various times before and after a blood meal induced precocious metamorphosis. 2. The highest percentage of adultoids was obtained when proallatotoxin was applied prior to feeding or up to day 3 after the blood meal. 3. The proallatotoxin-sensitive period ended 4 days after feeding just before the maximum peak of ecdysteroid concentration in the hemolymph. 4. The significance of these findings is discussed in terms of the juvenile hormone-sensitive period and the hormonal program which controls molting in this insect.
Azambuja
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Departamento de Biologia Geral, Universidade Federal Fluminense, Niteroi Brasil.
Garcia
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D000287:Administration, Topical; D000818:Animals; D001578:Benzopyrans / Q000008:administration & dosage / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D026461:Ecdysteroids; D006458:Hemolymph / Q000378:metabolism; D007447:Invertebrate Hormones / Q000097:blood; D008675:Metamorphosis, Biological / Q000187:drug effects*; D012239:Rhodnius / Q000254:growth & development*; D014225:Triatominae / Q000254:growth & development*
D001578:Benzopyrans; D026461:Ecdysteroids; D007447:Invertebrate Hormones; C032810:ethoxyprecocene