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activité morpho-genetique

International Journal of Tropical Insect Science (1)

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Biological activities of two juvenoids on nymphs of the American bird grasshopper, Schistocerca americana (Drury)
Félix Ortego, William S. Bowers
Journal:

Insect Science and Its Application / Volume 16 / Issue 3-4 / December 1995

Published online by Cambridge University Press:

19 September 2011, pp. 357-361

Print publication:

December 1995
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The juvenoids fenoxycarb and methoprene were evaluated for morphogenetic activity on last-instar nymphs of the American bird grasshopper, Schistocerca americana (Drury) (Orthoptera: Acrididae). Topical application of fenoxycarb induced supernumerary nymphs, adultoids and adults with curled wings. Methoprene yielded similar morphogenetic effects although at reduced levels of activity. Of particular interest, however, is the discovery that, in addition to its morphogenetic activity, fenoxycarb causes significant mortality in developing fourth-, fifth- and sixth-instar nymphs.