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Laboratory evaluation of two Insect Growth Regulators (IGRs) on Microcerotermes diversus (Silvestri) (Isoptera: Termitidae) in Southwest Iran

Behzad Habibpour, M. S. Mossadegh, Grace C. Henderson, Saeid Moharramipour

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Abstract

In economic terms, Microcerotermes diversus (Silvestri) is the most serious termite species damaging structures in southwest Iran. One safe control strategy that may reduce the subterranean termite damage in buildings is the use of Insect Growth Regulators (IGRs) in a suitable bait matrix. The effects of two juvenile hormone analogues, Admiral (pyriproxyfen) and farox, on M. diversus were evaluated over a range of concentrations (10-5000 ppm). Admiral and farox induced nymph-presoldier intercastes and incomplete ecdysis in nymphs of M. diversus under two-choice and no-choice feeding tests. These assays determined concentrations of Admiral and farox that would be useful in a bait formulation. Differentiation of nymphs into intercastes may cause disruption of the caste balance in M. diversus, leading to the collapse of the colony.

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What this paper is about

In economic terms, Microcerotermes diversus (Silvestri) is the most serious termite species damaging structures in southwest Iran. One safe control strategy that may reduce the subterranean termite damage in buildings is the use of Insect Growth Regulators (IGRs) in a suitable bait matrix. The effects of two juvenile hormone analogues, Admiral (pyriproxyfen) and farox, on M. diversus were evaluated over a range of concentrations (10-5000 ppm). Admiral and farox induced nymph-presoldier intercastes and incomplete ecdysis in nymphs of M. diversus under two-choice and no-choice feeding tests. These assays determined concentrations of Admiral and farox that would be useful in a bait formulation. Differentiation of nymphs into intercastes may cause disruption of the caste balance in M. diversus, leading to the collapse of the colony.

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Available abstract

In economic terms, Microcerotermes diversus (Silvestri) is the most serious termite species damaging structures in southwest Iran. One safe control strategy that may reduce the subterranean termite damage in buildings is the use of Insect Growth Regulators (IGRs) in a suitable bait matrix. The effects of two juvenile hormone analogues, Admiral (pyriproxyfen) and farox, on M. diversus were evaluated over a range of concentrations (10-5000 ppm). Admiral and farox induced nymph-presoldier intercastes and incomplete ecdysis in nymphs of M. diversus under two-choice and no-choice feeding tests. These assays determined concentrations of Admiral and farox that would be useful in a bait formulation. Differentiation of nymphs into intercastes may cause disruption of the caste balance in M. diversus, leading to the collapse of the colony.

Key concepts: Biology, Termitidae, Ecdysis, Juvenile hormone, Nymph, Pyriproxyfen, Insect, Toxicology

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Laboratory evaluation of two Insect Growth Regulators (IGRs) on Microcerotermes diversus (Silvestri) (Isoptera: Termitidae) in Southwest Iran — Research Paper | ScholarLens