A 2-yr field trial (2001 and 2002) and 1-yr semifield trial (2002) were conducted to evaluate the effect of transgenic herbicide (glyphosate) -tolerant canola Brassica napus L. pollen on larval and adult honey bee, Apis mellifera L., workers. In the field trial, colonies of honey bees were moved to transgenic or nontransgenic canola fields (each at least 40 hectares) during bloom and then sampl...

Field microplot, small plot, and greenhouse experiments were conducted to determine the effects of rotation crops on Pratylenchus penetrans, Meloidogyne hapla, and Rhizoctonia fragariae populations. Extraction of P. penetrans from roots and soil in microplots and field plots planted to rotation crops was highest for Garry oat, lowest for Triple S sorgho-sudangrass and Saia oat, and intermediate...

True ileal lysine digestibilities were determined using the homoarginine (HA) method in casein-, barley-, canola meal-, and barley-canola meal-based diets fed to growing pigs. Four Yorkshire barrows (25 to 49 kg BW) equipped with ileal T-cannulas were fed one of the diets according to a 4 x 4 Latin square design. All diets, except for the barley diet, were formulated to be similar in DE:CP rati...

INTRODUCTION The grain industry (mainly maize and wheat) is the largest crop industry in South Africa under rain-fed conditions. Significant changes have taken place since deregulation in agriculture and the termination of subsidies from mid 1990s. The total area under grain has decreased by about 10% to 15% (C. Du Plessis, pers. commun. 2001) due to lower prices (based on import parity and fre...

The comparative effects of different concentrations of saline soil and saline irrigation water were investigated on growth of canola (cv. Ganyou-5). Plants were subjected to control (non-saline), 0.2% (EC 2.5 dS.m-1), 0.4% (EC 4.5 dS.m-1) and 0.6% (EC 6.5 dS.m-1) of sea salt concentrations in soil as well as saline irrigation water. Vegetative growth parameters recorded were plant height, numbe...

Salinity level may affect early development of biofuel feedstock crops. The biofuel feedstock crops canola (Brassica napus L.), sorghum [Sorghum bicolor (L.) Moench], and sunflower (Helianthus annuus L.); and the potential feedstock crop sweet corn (Zea mays L.) were planted in media in pots and treated with aqueous solutions of 0, 0.1, 0.5 and 1.0 M NaCl once at: 1) planting; 2) 7-10 days afte...

Canola (Brassica napus L., Brassicaceae) research in Virginia began in the mid 1980s. A concerted and focused cooperative effort was initiated, with USDA-CSREES-National Canola Research Program funds, in 1993 by Virginia’s two Land Grant Universities: Virginia State University and Virginia Tech. A major goal of this effort, until recently, has been establishment of canola as a domestic source o...

Together with olive and soybean, canola is one of the most important and diffuse oilseed crops. Due to high oleic acid and antioxidant contents, canola oil shows positive effects on cholesterol, glycemic control, blood pressure and cancer. For these reasons, canola oil can be considered an important food-resource: future scientific research is expected to provide further evidence on adoption of...

Boron (B) is essential to growth at low concentrations and limits growth and yield when in excess. Little is known regarding plant response to excess B and salinity occurring simultaneously. In this study, two models of Leibig-Sprengel (LS) and Mitscherlich-Baule (MB), originally proposed to explain plant response to nutrients only, were modified to evaluate canola yield response to combined le...