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Male production by aphids prenatally treated with precocene: Prevention by short‐term kinoprene treatment
Author(s) -
Hales Dinah F.,
Mittler Thomas E.
Publication year - 1988
Publication title -
archives of insect biochemistry and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.576
H-Index - 66
eISSN - 1520-6327
pISSN - 0739-4462
DOI - 10.1002/arch.940070104
Subject(s) - corpus allatum , biology , instar , juvenile hormone , myzus persicae , offspring , aphid , endocrinology , medicine , larva , hormone , botany , pregnancy , genetics
We previously reported that precocene caused the aphid Myzus persicae to produce male offspring, and further, that daughters (G 1 ) of precocene‐treated females also produced males in several temporal patterns. These patterns characteristically exhibited male production early in the reproductive sequence and/or approximately 10 days later. We suggested that ovulation of male eggs might occur at subthreshold juvenile hormone concentrations immediately after precocene treatment (i.e., during the late embryonic stages of the G 1 aphids) and again in the last larval instar of the G 1 aphids. This paper describes experiments in which G 1 aphids were exposed to the JH analog kinoprene prenatally and in the last instar. It was shown that these treatments delayed, eliminated, or interrupted the expected sequences of males, thus providing evidence for the proposed scheme of male determination. The condition of the corpus allatum in G 1 adults correlated with the pattern of male production; in continuous male producers the corpus allatum had undergone delayed destruction. A schematic model of the endocrine control of male determination is presented.