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Binoy Babu, Gary Knox, Mathews L. Paret, and Francisco M. Ochoa-Corona

-linked immunosorbent assay nor a rapid lateral flow immunoassay is commercially available for testing RRV. A multidisciplinary team of scientists united by the USDA SCRI project entitled Combating rose rosette disease: Short and long term approaches is developing

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Richard L. Hassell, Jonathan R. Schultheis, Wilfred (Bill) R. Jester, Stephen M. Olson, Donald N. Maynard, and Gilbert A. Miller

the watermelon shipments in the United States ( USDA, 2004 ). In some areas of the United States, buyers will purchase only seedless watermelons. Most of the seedless watermelons sold range in size from 12 to 18 lb. During the past 20 years, the

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Adam Bolton and Philipp Simon

cultivated and 63 wild) from the USDA National Plant Germplasm System (NPGS) collection of plant introductions (PIs) in Ames, IA, 16 inbred lines from the USDA carrot breeding program, and 5 widely grown commercial carrot hybrids were included in this

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Dean A. Kopsell, Carl E. Sams, Dennis E. Deyton, Kristin R. Abney, David E. Kopsell, and Larry Robertson

pigment concentrations among different plant accessions available as germplasm from the USDA-ARS Plant Genetic Resources Unit. This study will identify and quantify carotenoid pigments present in the tissues of bunching onions. Data may be useful for

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Penelope Perkins-Veazie

1 E-mail pperkins-usda@lane-ag.org .

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Joseph G. Robins, B. Shaun Bushman, Blair L. Waldron, and Paul G. Johnson

contrast to the extensive evaluation of variation within this species for morphological and genetic diversity ( Johnson et al., 2002 , 2003 ; Johnston et al., 1997 ). The objective of this study was to evaluate a subset of accessions found in the USDA

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Kanin J. Routson, Ann A. Reilley, Adam D. Henk, and Gayle M. Volk

alive in American landscapes and are the subject of this regional southwestern survey. USDA pomologist W.H. Ragan undertook the task of recording the names and characteristics of every apple cultivar grown in the United States during the 19th century. In

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Ute Chambers, Vaughn M. Walton, and Shawn A. Mehlenbacher

filbertworm during one season in Oregon and correlate it to shell thickness at maturity. This study was conducted at the USDA National Clonal Germplasm Repository (NCGR) in Corvallis, OR, which maintains a living collection of more than 700 trees (accessions

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Patrick J. Conner and Ray E. Worley

Fifteen pecan (Carya illinoinensis) genotypes were evaluated over a period of 20 years in a test orchard located near Tifton, Ga. Genotypes tested included seedling selections (`Candy', `Maramec', `Melrose', `Moreland', `Sumner', and `Western Schley'), USDA releases (`Creek', `Kanza', `Kiowa', and `Pawnee'), and USDA selections (USDA 41-19-20, USDA 53-11-139, USDA 53-9-1, USDA 57-7-22, and USDA 64-11-17). Actual yields were measured for each tree in the test throughout the test period and the alternate bearing intensity (I) of each cultivar was calculated. Average annual nut production in years 1 to 10 ranged from 19 lb (8.6 kg) in the precocious cultivar `Candy' to 6 lb (2.7 kg) in the nonprecocious cultivar `Melrose'. Although a wide variation was seen in the average yield of clones in years 11 to 20, differences were not significant. A subsample of nuts was taken for each tree annually and percent kernel, nuts/lb, specific gravity, and nut volume were determined. Significant differences were found between clones for each of these traits. Most clones were not acceptable for commercial use in Georgia due to small nut size, poor kernel quality, or excessive alternate bearing. Recommended clones include: `Pawnee', which produced large nuts of excellent quality with an early harvest date, `Sumner', which produced large nuts of moderate quality with a late harvest date, and `Kiowa', a precocious bearer of large, good-quality nuts.

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Michael Wisniewski, Carole Bassett, and Lawrence V. Gusta

E-mail addresses: mwisniew@afrs.ars.usda.gov ; cbassett@afrs.ars.usda.gov ; gusta@duke.usask.ca .