Four blackberry varieties (Columbia Star, Natchez, Obsidian, Triple Crown) are being compared on a rotating cross arm trellis (also called swing arm trellis) in Michigan high tunnels. Obsidian and Columbia Star are the earliest ripening (started in late June) and the latest is Triple Crown (still fruiting in early August). The earliest types ripened before spotted wing drosophila became troublesome, whereas SWD larvae were seen in Natchez and Triple Crown fruit. Looking forward to tallying the yields!
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