Bulb mite Rhizoglyphus echinopus (Fumouze & Robin), Acari: Acaridae control on the gladiulus corm with disinfection of corms and by the predatory mite, Hypoaspis aculeifer.

Gladiolus is one of ornamental plants and one of the major cut flowers in Iran. Rhizoglyphus echinopus (Fumouze & Robin), (Astigmata: Acaridae) is one of the important pest of Gladiolus corms in Mahallat and Khomin. Disinfestations and mite predator release are 2 methods of control against this pest. So this project preformed in 24 treatments and 3replication in randomized complete block design. Disinfestations treatments (corms were soaked in poison solution for 25 minute) include: 1, 2 &3- abamectin (0.4, 0.8 , 1.2 ml/lit); 4, 5 & 6- ethion ( 1, 1.5, 2ml/lit); 7, 8 & 9- fenazaquin (0.5, 1, 1.5 ml/lit); 10, 11 &12- hot water (45 ° C for 25, 50 and 75 min.); 13, 14 & 15- release treatments of predator mite Hypoaspis (Gaeolaelaps) aculeifer (Canestrini),(Mesostigmata: Laelapidae) 10, 20 and 30 predator for every 100 Gladiolus bulb(infested with bulb mites); 16, 17 & 18- release of 100, 250 and 500 predator mites in square meters fifteen days after planting; 19, 20 &21- tap water control (30 ° C for 25, 50 and 75 min.);22- hot water (45 ° C for 25min) and release 10 predator for every 100 Gladiolus bulb; 23- hot water (45 ° C for 25min) and release of 100 predator mites in 1m2 ; 24- hot water (45 ° C for 25min) and release 10 predator for every 100 Gladiolus bulb with and release of 100predator mites in 1m2 15 day after planting. 150 Corms were considered and infestation of corms was estimated. Each plot separated with plastic and was sterilized its soil and 20 Gladiolus were cultivated in each plot. Result showed treatments were significant with control (α= 0.5). The highest of infestation Severity had in treatments 19, 20 and 21(control), the lowest of corms infestation percent and the lowest of infestation Severity had in 24, 23 and 22 treatments, the highest of number of corm produce had in 24 treatment, the highest inflorescence length had in 13 and 24 treatments, The height of Gladiolus stem length average had in 24, 23 and 13 treatments. The diameter of stem in treatments 23 and 12 are in the best group. Flowers in treatments 7, 14, 17 and 23 had the highest life expectancy. The best germination rate was in treatments 24.23 22, 14.15, 13 and 10. But number of bud is located in a group and their differences had non significant. Regarding features of Gladiolus, recommended biological (13) and integrated (24) treatments. Key word: Gladiolus, R. echinopus , H. aculeifer, disinfestations.