Abstract Purpose of Review Human-caused global change is fundamentally altering natural forest ecosystems. More trees are exhibiting a wide range symptoms indicative poor vigour, particularly stressed species at the edge their native ranges and stands growing on marginal sites. This review will focus complex tree diseases (declines) caused by pathogens key environmental drivers that contribute ...

Downy mildews and root and foliar rots caused by Phytophthora are among the most destructive plant pathogens and therefore have attracted considerable attention during the past two decades. Although it has been realized that a close phylogenetic relationship exists, so far sharp distinction has been made between the obligate biotrophic downy mildews and the hemibiotrophic Phytophthora. In the s...

Long growing seasons, relatively shallow root system, coarse textured soils, and variability of the subtropical environmental conditions southeastern U.S. create challenges for nitrogen (N) fertilizer management short-day onions. The objectives this study were: (i) to evaluate impact N rates on yield bulb quality three onion cultivars grown under U.S., (ii) assess rate onions consumers’ prefere...