Abstract
Mottled waterhyacinth weevils, Neochetina eichhorniae Warner, and waterhyacinth mites, Orthogalumna terebrantis Wallwork, were tested for mortality, feeding, oviposition, and emergence at 4 temperature regimes, viz. 5-25@*, 10-30@*, 15-35@*, and 20-40@*C. Highest mortality for both species occurred at the 2 extreme regimes. Lowest weevil mortality, 41.2%, occurred at 15-35@*C and lowest mite mortality, ca. 6-7%, at 10-30 and 15-35@*C. Weevil oviposition and feeding were significantly (P= 500/25 females, at the 3 highest temperature regimes, and development from immatures to adults, 42.3% emergence, was significantly highest at 10-30@*C. These data correspond generally to field observations.
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