muscles due to external wing base feeding during winter (SCHNEIDER , 1941), 5)altered or restive behavior due to irritability produced by mite movement andfeeding (PRELL , 1927 ; MORGENTHALER , 1944), 6) mite toxin causing flightmuscle paralysis (KILLICK , 1923), 7) altered metabolism (SKROBAL , 1965), 8)interference of flight muscles due to stiffened trachea (PRELL , 1927), 9)shortened longevity (BAILEY, 1958 ; BAILEY and LEE, 1959 ; GIORDANI , 1965).In extreme situations, populations in the prothoracic tracheae exceed 100 mitesper bee (MORISON , 1931 ; EISCHEN , unpublished).
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