Variability of Lycopersicon hirsutum f. typicum and possible compounds involved in its resistance to Tuta absoluta
Version of Record online: 24 DEC 2001
Agricultural and Forest Entomology
Volume 1, Issue 4, pages 249–254, November 1999
How to Cite
Ecole, C. C., Picanço, M., Jham, G. N. and Guedes, R. N. C. (1999), Variability of Lycopersicon hirsutum f. typicum and possible compounds involved in its resistance to Tuta absoluta. Agricultural and Forest Entomology, 1: 249–254. doi: 10.1046/j.1461-9563.1999.00036.x
- Issue online: 24 DEC 2001
- Version of Record online: 24 DEC 2001
- tomato leafminer;
- tomato resistance
1 The resistance of Lycopersicon hirsutum f. typicum and L. esculentum to the leafminer Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) was investigated in two experiments. The first experiment assessed the resistance of L. hirsutum f. typicum (accession LA 1777) to T. absoluta, the second assessed the variability of the resistance among plants of this accession.
2 It was found that L. hirsutum f. typicum was resistant to the leafminer, which showed longer larval phase, higher larval mortality, smaller numbers of large mines and greater numbers of small mines/leaf than on L. esculentum. Seven plants of the accession LA 1777 showed lower number of small mines/leaf, but their results of larval mortality and length of larval and pupal phase were similar. Twenty-two peaks were observed in total ion chromatograms of L. hirsutum f. typicum hexane extracts of leaves subjected to a gas chromatographic-mass spectrometric analysis (CG-MS). However, the matches obtained between the peak spectra and the MS database were too low to justify even preliminary identification of the compounds.