Do light intensity, temperature and photoperiod affect the entrapment of mites on glandular hairs of cultivated tomatoes?
✍ Scribed by P. Nihoul
- Book ID
- 104625334
- Publisher
- Springer Netherlands
- Year
- 1993
- Tongue
- English
- Weight
- 668 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0168-8162
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✦ Synopsis
Nihoul, P. 1993. Do light intensity, temperature and photoperiod effect the entrapment of mites on ghmdular hairs of cultivated tomatoes? Expl. Appl. Aca,ol. 17:709-718
The effects of plant growth conditions (.light intensity, temperature and photoperiod) on the proportion of spider mites (Tetranychus urticae) and predatory mites (Phytoseiulus persimilis) entrapped by type VI trichomes were investigated in the cultivated tomato l, ycopersicon esculentum. Trichomes released sticky substances showing rapid hardening when the trichome head was ruptured by contact with mites. Adult individuals of both species of mites were immobilized by exudates in a higher percentage on leaf stalks from plants grown in the light (160/xeinsteins cm -~-s -I) than on leaf stalks from plants grown in the shade f50/zeinsteins cmz s-t ). I.eaf stalks from plants grown in the light showed bigger u'ichome heads. More predatory mites were also entrapped on the leaf stalks from plants grown at 18:C (65% RH) as compared to the ones grown at 24°C (60% RH), whereas lrichome heads were bigger under the former conditions. Contrat 3' to leaf st',dks, Leaflet areas, through differences in trichome density and size, showed no differences in predator and spider mite entrapment. Trichome head size was probably related to mite entrapment. It is also hypothesised that temperature increa~ might influence predator entrapment through effects on trichome quality.