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- W2318447772 abstract "Feeding and host-selection behavior of Lema trilineata daturaphila Kogan & Goeden were analyzed, with emphasis on the phases of host finding, recognition, acceptance, and suitability. Three sets of bioassays were developed to monitor orientation, biting, and continuous feeding activities. Whole-leaf powders of Datura meteloides de Candolle were fractionated and incorporated into a basic artificial medium. Complete larval development was achieved on an artificial medium containing whole-leaf powder. Bioassays compared larval responses obtained with different plant fractions incorporated into artificial media to those obtained with fresh leaf material. Artificial media containing certain tropane alkaloids and chlorogenic acid were used to test the role of these secondary metabolites found in host plants of L. t. daturaphila. A working hypothesis was formulated to explain host selection by insects associated with the Solanaceae based on a comparison of the host ranges of L. t. daturaphila, the Colorado potato beetle, Leptinotarsa decemlineata (Say), and the tobacco hornworm, Manduca sexta (Johannson), and on their reported tolerances to specific alkaloids of the Solanaceae. It is proposed that host selection is governed by feeding excitants that have a widespread occurrence among plants of this family. However, acceptance of certain plant species is limited by the distribution of particular alkaloids, namely tropane alkaloids that prevail in host plants of L. t. daturaphila, certain steroidal alkaloids occurring in preferred hosts of the Colorado potato beetle, and nicotine which is found in some hosts of the tobacco hornworm." @default.
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- W2318447772 date "1971-11-15" @default.
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- W2318447772 title "Feeding and Host-Selection Behavior of Lema trilineata daturaphila Larvae (Coleoptera: Chrysomelidae)1" @default.
- W2318447772 doi "https://doi.org/10.1093/aesa/64.6.1435" @default.
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