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United States Department of Agriculture

Agricultural Research Service

Title: 'knucklehull-Vnr' a Blackeye Cowpea Mosaic Virus and Root-Knot Nematode Resistant, Crowder-Type Southernpea

Authors
item FERY, RICHARD
item THIES, JUDY
item Gillaspie, Athey

Submitted to: HortScience
Publication Type: Abstract Only
Publication Acceptance Date: July 14, 2003
Publication Date: August 1, 2003
Citation: Fery, R.L., Thies, J.A., Gillaspie Jr, A.G. 2003. 'KnuckleHull-VNR' a blackeye cowpea mosaic virus and root-knot nematode resistant, crowder-type southernpea [abstract]. Hortscience. 38(5):782.

Technical Abstract: The USDA has released a new knuckle-purple-hull, crowder-type southernpea cultivar named KnuckleHull-VNR. The new cultivar was developed as a replacement for Knuckle Purple Hull, a cultivar widely grown by fresh-market growers and home gardeners throughout the southeastern United States for many years despite susceptibility to Blackeye cowpea mosaic virus and root-knot nematodes. The major attributes of KnuckleHull-VNR are its excellent resistances to Blackeye cowpea mosaic virus and root-knot nematodes. KnuckleHull-VNR produces dry pods at Charleston, S.C., in 68 to 74 days. A typical pod is slightly curved, 20 cm long, and contains 14 peas. Fresh peas have a semi-crowder to crowder shape and a light green color. Dry KnuckleHull-VNR peas have a brown-colored, smooth seed coat, and are smaller in size than Knuckle Purple Hull peas (weight per 100 dry peas: KnuckleHull-VNR, 15.2 g; and Knuckle Purple Hull, 19.7 g). The results of replicated trials indicate that the yield potential of KnuckleHull-VNR is similar to that of Knuckle Purple Hull. KnuckleHull-VNR is recommended for use by fresh market growers and home gardeners who are concerned about yield losses to their Knuckle Purple Hull plantings caused by Blackeye cowpea mosaic virus and root-knot nematodes.

Last Modified: 9/10/2014