Undecanone, glandular trichomes

In a related study, Kauffman and Kennedy (65) demonstrated that the toxicity of PI 134417 and BC2 foliage to sonorensis larvae during cocoon spinning was eliminated when the glandular trichomes were removed. They further demonstrated the acute toxicity of 2-tridecanone and 2-undecanone to sonorensis larvae on treated filter paper disks (2-tridecanone LC50 = 13.0, 95% fiducial limits =... 

The negative tritrophic level effects associated with PI 134417 foliage are likely to be extreme relative to those associated with other plant defenses, because of the high acute toxicity of 2-tridecanone and 2 undecanone and their presence at biologically active concentrations in the tips of glandular trichomes on the leaf surfaces. Despite this, the tritrophic level interactions associated with PI 134417 provide some appreciation for the diversity and complexity of ecological effects of even relatively simple plant defenses. 

Farrar, R. R, Jr. and G. G Kennedy. 1987b. 2-Undecanone, a constituent of the glandular trichomes of Lycopersicon hirsutum f. glabratum effects on Heliothis zea and Manduca sexta growth and survival. Entomol, Exp. Appl. 43 17-23. 

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