Survey of pedackas mites and spider assodated with pests was Infesting Tomato 031113 (variety geto-86) in Fayoum Gewernorate, Egypt dud® 20313 and 2009 seasors to determine the most common suedes, which Nay an inexetant role in controlling these pests. The collected Ilrevoreclacca6 mites were 7yrophagnus put/meal:ix Nasty Amrk4e), ittyphagstarscaerus labs and raf$2607,10 Wee (Fan* Tarsonenidae), Termoydrus ur6cae (Family Tetranychklae), OrthabOes ceiforalcus (Family Tydeklaa), ICkerneraa samosas (Farr* Amenzeidae) and 4pto stictr (Fan* Oppildae). The study showed that the commonest predadaus prostigmatid and Inesostignadd mites were different suedes. Three of then belonging to Sohreder Prosbernsta a/wombs utioAus (Family Tydektee), Agistemus exert°, (Fantify Stgrnaeidae) and &pods, sevmdacs (Parlay Eteepocidee) and three species, ihytosekArs persisaa; to scutaiS and Anblyseas cyrawdadyfon Lacier (Subcedes Mesostigmata). In this Al*, the abundance of these mites and Spiders was differed act^-ceding to environmental conditions and the time el pesticide appecabzn. The sNders in this study were Cheirecartfikan iSil101M and C peasgabim (Family : Mittagklae), Argicpe bilssdala std alpeophora obicula (Fatally: Araneklae), Mamas aibird(Fartay : PhkdromIdae) and Hagar few (Family : tycosidae).The effect of the tomato russet mite, Aadap, bcopend on the tklogkal aspects of the commonest predapsus mite Prcesnalus dogging (McGregor) at 25 oC and relathe humlIty 75 % Alt was irwestigated. The We cyde of predator donated 14.0 and 18.62 days for male and female respectively. The adult predatory mite Ned abeut 13.35 in case of male indinduah and Ingest to recorded 16.55 days in case of adtA females under the same conditien. Also, the average number al Carole deposited eggs moan 24.25 eggs. the edit predator, male and female fed on 29.4 and 36.24 rnovakk stages, rtspeddvely Owing the 1k cycle, as well as prey consumption signikandy irkreasel dieing adult stages, whereas , male and female consumed 29.4 and 36.24 movaNe stages of the prey, resPectheh.