Breidling E., 1984: Ecdysteroids in the american dog tick dermacentor variabilis acari ixodidae during different periods of tick development. Journal Of Medical Entomology: 514-523 Ecdysteroids occur in all life stages of the American dog tick, D. variabilis. 20-Hydroxyecdysone (20-Oh ecdysone) and 2 other radioimmunoassay (Ria) positive fractions were found in engorged nymphs and adult ticks. […]
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