Cephalosporium stripe (fungus str ipe) is a vascular wi l ttype disease of wheat and barley, which also affects other cereals and grasses. l t is caused by the soifborne fungus Cephalosporium gramineum. ln autumn, the fungus produces millions of bacteria-sized spores (conidia), which are washed into the soil around the plant. These spores are the structures that will eventually infect the plant...

Ornithine carbamoyltransferase (EC 2.1.3.3) activity was detected in apple (Pyrus malus L.) leaf tissue from early June to November. Total activity remained relatively constant at 4.1 mumoles citrulline produced per hour per 10 cm(2) until mid-October when it sharply doubled. Following the first frost of the autumn, the enzyme lost about 80% of its former activity. The enzyme from apple leaf ex...

Projected changes in the relative abundance and timing of autumn-winter migration are assessed for seven dabbling duck species across the Mississippi and Atlantic Flyways for the mid- and late 21st century. Species-specific observed relationships are established between cumulative weather severity in autumn-winter and duck population rate of change. Dynamically downscaled projections of weather...

Previous evidence indicates that changes in well-defined phases of dormancy in underground adventitious buds of leafy spurge in late summer and autumn are regulated by complex sensing and signaling pathways involving aboveground sugar signals. However, little information exists concerning seasonal photosynthesis and carbohydrate partitioning of leafy spurge, although such information would help...

Maize silage has been used as a forage reserve strategy for critical periods or continuous use in animal feed. However, new genotypes and their potential must be identified. Thus, this study aimed to evaluate the of maize grain one off-season midwest region Brazil, under limited water frost, select them dual purpose (silage grain) using GT Biplot tool. The experiment was performed at Embrapa We...