The hot temperatures of the early portion of this week provided another challenge for Mid-Columbia cherry growers with harvest in full swing.  Oregon State University extension agent Lynn Long says temperatures up around 100 degrees make it more difficult to get the quality of fruit growers want.  Long points out orchardists take steps to pick the firmest cherries possible, including doing most of the picking in the early morning when the fruit is at its highest quality.  Bing cherries are being picked this week in the Mill Creek and Mosier areas, and starting this weekend in the Hood River Valley.