Florian I. Lauer

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The past 25 years, 1686 potato accessions, representing 100 species in the genus Solanum L., subgenus Potatoe, section Petota, were evaluated for field resistance to one or more of the following insect pests: green peach aphid, Myzus persicae (Sulzer); potato aphid, Macrosiphum euphorbiae (Thomas); Colorado potato beetle, Leptinotarsa decemlineata (Say);(More)
Nine potato clones/cultivars selected for varying degrees of Verticillium wilt (VW) resistance based on degree of vascular colonization, were intercrossed and outcrossed to 13 uncharacterized clones. Based on growth characteristics of 3,535 seedling transplants and an assay quantifyingV. dahliae in potato vascular tissue, 404 clones were selected for(More)
The use of leaf-bud cuttings as a tool for rapid clonal increase was studied in 6 cultivars. Small tubers were obtained directly from leaf-bud cuttings maintained for 7 weeks in sand-filled pots or benches. The tubers ranged in size up to 1 1/4 inches (3cm) in diameter. The number of leaf-bud cuttings ranged from 37 to 288, depending on size of mother(More)
Five cultivars were studied for 3 years to estimate the genotype × environment interactions. Plant height was studied at four locations. The tuber characters, yield, type, number, and specific gravity were studied at three locations. There were no significant clone × location or clone × year interactions. The clone × year × location interaction was(More)
Selection of potato clones for field resistance to late blight was made satisfactoly in the field by inoculating 3-hill units with zoospores ofPhytophthora infestans. More precise comparisons were made in replicated 15-hill plots by measuring the spread of the disease from a single inoculated plant in the center of each plot. Certain selections made in the(More)
Our objective was to test whether the NPK levels in commonly used Murashige and Skoog (MS) media are optimal for microtuberiztion for the two cultivars tested. Two N (N1 = 841 and N2 = 1418 mg L−1); three P (P1 = 39, P2 = 76.9 and P3 = 115 mg L−1; and two K (K1 = 784 and K2 = 1518 mg L−1) media concentrations were evaluated for microtuberization. Higher(More)
Tuber yield of plants from three sizes of in vitro produced microtubers were compared to yields of plants from three sizes of greenhouse produced minitubers of Nicola and Russet Burbank. Microtubers were: small-size, 0.2–1.5 g; mid-size, 1.5–3.0 g; and large-size, >3.0 g. Minitubers were: small-size, 15–20 g; mid-size, 20–40 g; and large-size, >40 g. Both(More)
  • Therese M. Work, Pete Weingartner, +15 authors Joseph Guenthner
  • 2008
Total assets of the Association (excluding back issues of the APJ) were higher at the fiscal year ending June 30, 1989 by $9,033. The total interest earnings from checking and savings amounted to $7,211. Total assets of $99,971 are distributed accordingly in the following funds: General $91,321, Speakers $7,200 and Memorial $1,450. Included in the $99,971(More)
Honorary Life Membership President President-Elect Vice-President Past-President Secretary Treasurer Director Director Director Director Director Joseph J. Pavek Steven Slack Ronald E. Voss Donald A. Young David Curwen Therese Work Alvin Mosley Joseph B. Sieczka Robert Hanneman, Jr. David G. Holm Gene Shaver Section Chairs Ex Officio Breeding/Genetics Steve(More)