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Host plant examining

The host range of the tobacco hornworm (Manduca sexta) is limited to selected members of the family Solanaceae. In an effort to better understand the chemical basis for the host plant selection process, we have undertaken an examination of both hornworm preferred and non-preferred members of the Solanaceae. Our investigations have shown this tc be a complex system involving the subtle interaction between such behavioral modulators as (1) Ovipositional stimulants (2) Feeding stimulants and imprinters (3) Anti-feedants (A) Repel-lants (5) Insecticides. The results of these investigations will be discussed. [Pg.245]

The ultimate purpose of finding, examining, and consuming behaviors is, of course, to increase the probability that the insect (or its offspring) consumes hosts on which fitness, i.e., developmental rate, survivorship and/or fecundity, are maximized (Jaenike, 1978 Mitchell, 1981 Rausher, 1983). These fitness components are influenced by such plant characteristics as nutritional quality, presence or absence of toxins, and exposure to natural enemies, which collectively determine the host plant s suitability. Although documented cases are yet few, it is generally hypothesized that the acceptability of plant cues is positively correlated with suitability. [Pg.146]

The purpose of this study was to examine the Individual and Interactive effects of Infection by a N2 flxlng bacterium or an endomycorrhlzal fungus on the quality and quantity of extractable-llpld fatty acids (ELFA) from soybeans. The intent was to determine If there are organ-specific shifts In host-plant lipid metabolism following Infection by these microsymbionts. [Pg.348]


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See also in sourсe #XX -- [ Pg.133 ]




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Host examination

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