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Leptine Glycoalkaloids and Resistance to the Colorado Potato Beetle (Coleoptera: Chrysomelidae) in Solanum chacoense
Leptine Glycoalkaloids and Resistance to the Colorado Potato Beetle (Coleoptera: Chrysomelidae) in Solanum chacoense
- Source :
- Environmental Entomology. 15:1057-1062
- Publication Year :
- 1986
- Publisher :
- Oxford University Press (OUP), 1986.
-
Abstract
- The role of leptine glycoalkaloids in resistance to Leptinotarsa decemlineata (Say) was studied with Solanum chacoense Bitt. clones that had been selected for extremes of leptine level. Three high-leptine (120–306 mg/100 g fresh weight) clones, one from each of three accessions, were compared with three low-leptine (0–51 mg/100 g) sib-clones for number of adults and feeding damage in the field, adult feeding rate on leaf disks, and larval development on detached foliage. Number of adults per plant on the six clones ranged from 1.5 for the clone with the highest leptine level (306 mg/100 g) to 37.5 for a clone lacking even a trace of these rare glycoalkaloids. There were also wide and significant differences among the six clones for adult feeding damage, adult feeding on leaf disks, larval development rate on detached foliage, and survival to adult eclosion. Differences between the high- and low-leptine clone from each accession were significant for all five resistance parameters, and these differences appeared to be directly related to the concentration of foliar leptines.
Details
- ISSN :
- 19382936 and 0046225X
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Environmental Entomology
- Accession number :
- edsair.doi...........9aaea4e95d60d37a1b3bce5826df7f6d
- Full Text :
- https://doi.org/10.1093/ee/15.5.1057