Influence of leaf trichomes on predatory mite (Typhlodromus pyri) abundance in grape varieties.

摘要: Non-glandular leaf trichomes positively influence the abundance of many phytoseiid mites. We characterized grape (domatia, hairs, and bristles) on Typhlodromus pyri Scheuten over two years in a common garden planting varieties 2 sampling commercial vineyard. In general, lack was associated with much lower predator numbers case Dechaunac, cultivar almost no trichomes, very few T. were found. Phytoseiid best predicted by model where domatia hair had an additive effect (r2 = 0.815). Over at vineyard there present all 5 cultivars except Dechaunac. At same time, European red mite prey Dechaunac alone. These results suggest that lacking likely will not attain sufficient densities to provide biological control mite, despite presence food source. The relationship between is observed scale single vines appears also be manifest Because persistence predatory mites or nearby habitats important for effective control, through their persistence, may critical successful some systems.