However , queen hornets that have been infected by S. vespae have become sterilized due to their undeveloped ovaries .
However , queen hornets that have been infected by S. vespae start visiting decaying logs much earlier in the year , during early to mid-summer .
However , queen hornets that have been infected by S. vespae have become sterilized due to their undeveloped ovaries and start visiting decaying logs much earlier in the year , during early to mid-summer .