7 pages matching reaction on Gomphrena in this book
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12 plants A-6 indicating Antigo Mach antiserum aphid atypical lesion carborundum certified seed clone Cockerhan concentration of PVX Deerbrook Ormsby Farms detached leaf technique detection of PVX expressed sap Gomphrena and pepper Gomphrena globosa greenhouse host for PVY inches high inconclusive indicator host A-6 Indicator host plants indicator plant interveinal mottle large number leaf roll virus leaves of A-6 lesion counts lesion host lesions on Gomphrena local lesion host mosaic plants mosaic symptoms necrotic obtained from Dr Ontario RFD percent in 1964 percent in 1965 Physalis floridana Plant number pliers potato plants Potato virus produce typi PVA and PVY PVX in potato reaction on Gomphrena Red Pontiac RFD reliable test Rugose Russet Burbank variety serological reaction serological test slight crinkle spatula sprouts and tubers Starks Starks Farms sterile muck soil strain of PVX temperature thesis tuber juice University of Wisconsin virus diseases virus X viruses visual inspection X-free seed stocks