الفهرس 
Effect of mite infestation on the leaf tissuesOnly 14 pages are availabe for public view
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Abstract
Four Solanum species of eggplant and potato were evaluated for resistance to Tetranychus urticae Koch and its effect on the leaf chemical components. The egg-plant species were S. mammosum L. PI 245968 (a wild species) and S. melongena ( a cultivated species), while potato species were S. berthaultii Haweeks PI 265857(a wild species) and S. tuberosum L. (a cultivaetd species). Evaluation of resistance was based on the mite population in the greenhouse. The wild species of eggplant and potato were more highly resistance than cultivated ones. The eggplant, S. melongena, was more highly susceptible than the potato S. tuberosum.
Mite infestation reduced the chlorophyll and phosphorus content in infested plant leaves of cultivated eggplant and potato. Also there were a reduction in the leaf area and plant length of eggplant S. melongena. Mite feeding affected the leaf tissue structure and destroyed chloroplasts at the feeding sites.
The leaf surfaces of eggplant and potato wild species were covered with glandular trichomes, while the cultivated eggplant had non-glandular trichomes. Crude leaf surface washes of eggplant and potato (wild species) caused repellency, reduced fecundity and were toxic to females T. urticae. Crude washes of potato S. tuberosum had similar but less activity.
A series of experiments were conducted to study the biochemistry and activity of trichome exudates from the cultivated and wild species of eggplant and potato.