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Oregon Growers Checking For Heat Damage To Grapes, Berries

Extended periods of high heat can damage wine grapes, blueberries and raspberries.

Extended periods of high heat can damage wine grapes, blueberries and raspberries.

U.S. Department of Agriculture

Oregon berry and grape growers are watching for damage caused by unusually hot weather that settled into Western Oregon and the Portland area.

Excessive heat can blister or sunburn wine grapes, which are still developing and won’t be harvested until September. Late season raspberries may develop white drupelets due to sun scald.

Blueberry harvest of mid- to late-season varieties is underway, and crop consultant Tom Peerbolt said mature berries may shrivel in the heat, while green berries may not reach full size.

“The plant can’t pump enough water, so it shuts down and interferes with sizing,” he said. “Fortunately a lot of the commercial folks have installed cooling systems, and they pay for themselves in an event like this.”

Read more at the Capital Press.

oregon farmers berries heat damage summer

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