ISSN:
1570-7458
Keywords:
Coleoptera
;
Chrysomelidae
;
Leptinotarsa decemlineata
;
Colorado potato beetle
;
Solanaceae
;
Solanum berthaultii
;
plant resistance
;
glandular trichomes
;
host preference
;
behavior
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Choice and no-choice studies were conducted to determine how the glandular trichomes of the wild potato,Solanum berthaultii Hawkes, affect host preference of the Colorado potato beetle,Leptinotarsa decemlineata (Say). Given a feeding choice betweenS. tuberosum andS. berthaultii, larvae and adults preferred the foliage ofS. tuberosum, but adults were more discriminating. When foliage ofS. berthaultii was appressed toS. tuberosum leaflets, fewer adults fed on the appressed leaflets. When given a choice between ‘trichome-intact’ and ‘trichome-removed’S. berthaultii foliage, adults preferred to feed on the latter. The preference for ‘trichome-removed’ foliage and the percent of adults initiating feeding, increased with the degree of trichome removal. These studies provide evidence that the resistance ofS. berthaultii is associated with feeding deterrents localized in the glandular trichomes, thatS. berthaultii possesses more than one mechanism of resistance to the Colorado potato beetle, and that the expression of resistance is dependent on the developmental stage of the insect.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02380555
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