the grape erineum mite (gem), colomerus vitis (pagenstecher) (acari: eriophyidae) is considered to be one of the most important pests, that sometimes causes irreversible damages to grapevine cultivars in western parts of iran. studies were carried out in order to find natural enemies associated with gem, during 2011-2013. results indicated that natural enemies included two species of predatory ...

A new mite species belonging to the Eriophyidae (Acari: Eriophyoidea) from Kunming, Yunnan Province, southwestern China, is described and illustrated. Calepitrimerus kunmingensis sp. nov. causes erineum on its host plant, Schefflera odorata (Blanco) Merr. & Rolfe (Araliaceae), commonly known as the umbrella tree.

Generalist predatory mites belonging to the Phytoseiidae play a major role in keeping phytophagous mites below economic threshold levels in European apple orchards and vineyards. Apart from their primary prey, these phytoseiids can exploit a range of other foods, among which pollen and plant pathogenic fungi are very important. The ability of generalist predatory mites to feed on alternative fo...

Persian walnut (Juglans regia L., Juglandaceae), one of the essential nut crops, is affected by different diseases, including mite attacks which result in gall and erineum formation. As proportion leaf area covered galls or typically relatively low, impact on tree photosynthetic productivity often considered minor, no pest control management usually suggested. However, effect erineum-forming mi...

Structures on the surfaces of leaves, such as dense layers of non-glandular trichomes, strongly affect phylloplane mite activities. On the other hand the feeding of eriophyoid mites on leaf surfaces can cause hyperplasia of leaf trichomes (erinea formation). In many cases the hyperplasia is accompanied by the accumulation of pigments within trichome cells, causing an impressive red-brown colour...

Ethyl formate (EF) in combination with CO2 was tested for control of arthropods commonly infesting California table grapes. In addition, table grape tolerance to EF exposure was evaluated. LC99 estimates were developed for target pests by using a range of EF concentrations (0.04-4.7% EF). Response to treatments varied greatly between species, as well as life stages within species. Western flowe...