Abstract
Blood-seeking Chrysops atlanticus Pech. females begin to respond to a host shortly after sunrise and will remain at a high level of responsiveness until shortly before sunset. Based upon hourly counts, the largest numbers visit the human host shortly after sunrise and shortly before sunset. When counts begin in the afternoon, however, a peak also occurs at 1300 h. The data suggest that destructive sampling methods may bias the results of studies of saltmarsh deer fly biting cycles and lead to misinterpretations of apparent cyclic patterns. One hour past sunrise appears to be the most favorable time for applying insecticidal sprays.
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