(Statesmanjournal) - Threats of migratory birds, destructive mold and fall weather make it a tough time to be a wine grape in the Willamette Valley. Area growers are on pins and needles as they deal with another delayed harvest — the result of heavy spring rains and a cool growing season. Similar weather patterns in 2010 contributed to a 22-percent decrease in Oregon wine grape production, according to the National Agricultural Statistics Service. With an even later vintage this year, Oregon growers are feeling the pressure.