Current ruminant feeding systems depend on knowledge of the composition of feeds and the rate and extent of degradation of feed organic matter (OM) and crude protein (CP) in the rumen. The effect of storage and preparation of samples on in vitro gas production and fermentation characteristics of two common forage species, namely alfalfa and ryegrass werestudied. Samples were prepared as fresh (...

Laboratory studies were conducted to compare the relative fitness of clodinafop-propargyl herbicide resistant Lolium rigidum accessions with their clodinafop-propargyl susceptible counterparts in 2014. Factors evaluated were Lolium populations at constant salinity stress (0, 5, 10, 15, 20 and 25 dS cm2) and water stress (0, -3, -6, -9, -12 and -15 bar). The maximum germination in salinity stres...

The residues of metolachlor [2chloro-2'-ethyl-N-(2-methoxy-l-methylethyl)6'-methylacetanilide] applied to a soybean field were determined separately as to water-soluble and water-insoluble ingredients and were found to fluctuate with precipitation. The half life of all metolachlor was calculated as 40 to 60 days in 1990 and 4 to 5 days in 1991. The half life of the water-soluble ingredients, ho...

Transgenic plants expressing various species of the detoxifying enzyme, cytochrome P450 monooxigenase from mammals, were bred by Agrobacterium-mediated transformation. The transgenic plants metabolized exogenous chemicals, including herbicides which they were able to tolerate. Because the enzymes had broad substrate specificity, the transgenic plants showed crosstolerance to several herbicides,...

Soybean growers have adopted herbicide tolerant varieties at a rapid rate. While some potential cost savings may have driven adoption, the primary reason growers are switching to new programs is the simplicity and flexibility of a weed control program that relies on one herbicide to control a broad spectrum of weeds without crop injury or crop rotation restrictions. Roundup Ready weed control p...

Italian ryegrass (Lolium multiflorum L.), a cross-pollinated grass, is gradually becoming predominant weed in wheat fields China and evolving resistance to many groups of herbicides. The aim this study determine the levels single L. population from field Henan Province China, three modes action (MoAs) herbicides further characterize potential mechanisms. This evolved multiple herbicide resistan...

This study used a static, partial budgeting approach to estimate the potential net benefits of the adoption of herbicide-tolerant transgenic rice in California. Scenarios were developed based on average cost figures across the state using actual pesticide use data and assuming a rice-only rotation, as well as a three-year field study of efficacy of herbicide regimes in the presence of herbicide...