When farmers first shift from conventional tillage (CT) to conservation agriculture (CA) practices, the control of weeds may be more difficult, due absence tillage. However, continuous CA, over several years, alter weed seedbank. The nature seedbank changes time, in intensively cropped rice-based rotations that are typical Eastern Gangetic Plain, not well understood. Two on-farm CA experiments ...

We have used a polymerase chain reaction (PCR) procedure to analyse low abundance complementary sense RNAs of Digitaria streak virus (DSV) from infected leaves of Digitaria setigera. This study has confirmed that both spliced and unspliced RNAs are synthesised by the same transcription unit. The position of the intron has been proven from sequencing cDNAs corresponding to the spliced RNA. Altho...

Isolated mesophyll cells and bundle sheath cells of Digitaria sanguinalis were used to study the light-absorbing pigments and electron transport reactions of a plant which possesses the C(4)-dicarboxylic acid cycle of photosynthesis. Absorption spectra and chlorophyll determinations are presented showing that mesophyll cells have a chlorophyll a-b ratio of about 3.0 and bundle sheath cells have...

The objective of this study was to evaluate the effects interseeding crabgrass (CG) with two annual summer legumes on forage nutritional composition, dry matter (DM) yield, and in vitro fiber digestibility. conducted as a randomized complete block design four replicates per treatment. Plots were randomly assigned one six mix treatments. Crabgrass, cowpea (CWP), lablab (LL) planted monoculture o...

Switchgrass (Panicum virgatum L.) is typically slow and difficult to establish. Field experiments evaluated switchgrass establishment and the response of warm-season grass weeds (large crabgrass [Digitaria sanguinalis (L.) Scop.], broadleaf signalgrass [Urochloa platyphylla (Munro ex C. Wright) r.D. Webster], Johnsongrass [Sorghum halepense (L.) pers.], and Texas panicum [Urochloa texana (Buckl...

Because of the increasing number of glyphosate-resistant weeds, alternate herbicide-resistant crops and herbicides with different modes of action are required to protect crop yield. Glufosinate is a broad-spectrum POST herbicide for weed control in glufosinate-resistant crops, including soybean. The objective of this study was to compare herbicide programs with glufosinate applied singly at lat...