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The objective of the study was evaluate the effects of gamma radiation on the stages of the life cycle of mites: Tetranychus urticae, Tetranychus desertorum, Oligonychus ilicis with the quarantine treatment as an alternative method of control. To realization of the research the mites were placed in plastic trays measuring 40 x 27 cm surrounded by hydrophobic cotton moistened with water and entomological glue (Stick ®). Each species was separately placed in cages of wood coated with organdy fabric type (1.5 x 1.5 x 1.5 m) , and maintained in a greenhouse under alternate host plants Jack Bean (Canavalia ensiformis L) and in leaves of coffee (Coffea arabica L) only for O. ilicis. Each species of mite was identified in a stereoscope microscopic and transferred with a fine-tipped brush on separate petri dishes and individualized with 1 female mite per plate (a total of 32 plates) containing leaves of jack bean (C. ensiformis L) and leaves of coffee (C. Arabica L). The irradiation the mites females were taken an irradiator of Cobalt60 source, Gammacell – 220 type using a dose rate of 0.486 kGy / hour, with doses of 0 (Control) 100, 200, 300 and 400 Gy, with a total of 5 treatments and 32 replications by each mite. The evaluate were made the every 24 hours, for a period of 22 days after irradiation, counting the number of: eggs, nymphs and adult mortality of mites. For statistical analysis, were used generalized linear models with quasi-binomial distribution and Gaussian type for data analysis of proportions of mortality and duration in days of the stages of eggs and nymphs of the three species of mites were used in the study. The verification of the quality of adjustment of the data was done through the use of half-Normal Graphic of probabilities with envelope simulation. When significant differences among treatments, multiple comparisons (Tukey test, P <0.05) were conducted by glht function multicomp package with adjustment of P values All analyzes were performed using the statistical software "R", version 2.15.1. The results showed a decrease of the viability of the eggs and of the

Uso da radiação gama do Cobalto-60 em ácaros de importância agrícola visando o tratamento quarentenário