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The biology of Cheyletid mite, Cheletomorpha lepidopterorum (Acari: Cheyletidae) on three different immature stages of two acarid mites, the seed wheat mite ,Goheria wahabeii El-Naggar,Taha& Hoda and the storage grain mite, Blomia tropicalis Bronswijk and also the Tetranychid Brown wheat mite, Petrobia latens (Muller) was conducted at 20 C and 60% R.H in the laboratory. Acarid mites used as faclitious food for mass rearing this predator. Ch. lepidopterorum showed a higher fertility 97 egg on immature stages of G. wahabeii as food than on other tested preys. Predator has a high predation capacity when fed on immature stages of P. latens ; B. tropicalis and G.wahabeii ,respectively. Food consumption during predator total immatures averaged (25.2 ; 35.1 and 70 prey) for predator male and (50 ; 71.6 and 103 prey) for predator female when fed on immature stages of aforementioned prey, respectively; while, during life span predators consumed (154.7; 166.1 and 265.5 prey) for male and(200; 242 and 342 prey) for female on the same preys, respectively. Life table parameters showed that the highest intrinsic rate of natural increase (rm) was reached as 0.206 when fed on immature stages of G. wahabeii which considered as the optimal prey for this mite. Lower rm value as 0.177was obtained when fed on immature stages of P. laten. Time for population doubling was determined as( 3.93, 3.34 and 3.42) at different studied prey, respectively. The results indicate the possibility of using some Acaridida species; B. tropicalis and G.wahabeii for the mass-rearing of Cheyletid mite, Ch. lepidopetrorium potentially fostering wider use as biocontrol agents for Astigmatid and Phytophagous mites. Complementary studies for that species, as other factors could influence the suitability of these prey as food sources.

journal of plant protection and pathology /journal of plant protection and pathology

Effect of Different Prey on Biological Aspects , Fecundity and Life Table Parameters of the Predatory Mite ,Cheletomorpha lepidopterorum Shaw (Acari:Actinidida:Cheyletidae)