Varroa mites arrived in 1987 but even after 26 years it seems to be still ranked as Number One on the list of bee problems. Therefore much research is concentrated on that pest. During those 26 years it became apparent that Varroa hosted and seemed to transmit viruses detrimental to honey bee health. So virus research entered top ranking in health studies in honey bees. CCD is a relative newcomer in bee problems and helped boost research on the new pesticides.
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