Journal of Economic Entomology (1999) 92, 890-898

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Nan-Yao Su, Paul M. Ban and Rudolf H. Scheffrahn (1999)
Longevity and efficacy of pyrethroid and organophosphate termiticides in field degradation studies using miniature slabs
Journal of Economic Entomology 92 (4), 890-898
Abstract: Organophosphate (chlorpyrifos, fenitrothion, and isofenphos) and pyrethroid (bifenthrin, cypermethrin, lamda-cyhalothrin, and permethrin) formulations were applied in sand and covered by miniature slabs in a field study in southern Florida. Sub-slab sands were sampled annually for up to 5 yr to evaluate their barrier efficacy against the Formosan subterranean termite, Coptotermes formosanus Shiraki, and the eastern subterranean termite, Reticulitermes flavipes (Kollar). The bioassay results showed that at the rates tested under these miniature slabs, pyrethroids generally provided longer protection than organophosphates, but microencapsulated formulations extended longevity of some organophosphates. According to the half-life regression model, permethrin had the longest half-life (21.9 mo) among the 7 insecticides selected for residue analysis. Because the foundation size of a typical house is much larger than the miniature plots used in this study, our results should be interpreted with caution.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Nan-Yao Su

Research topic(s) for pests/diseases/weeds:
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Coptotermes formosanus U.S.A. (SE)
Reticulitermes flavipes U.S.A. (SE)