Chestnut blight

Erin Scheller - 23793699 Professor Steven Lindow & Cat Adams ESPM C192 16 November 2015 The Use of Fungal Viruses in the Control of Chestnut Blight: Addressing the Problem Chestnut Blight, caused by the fungus Cryphonectria parasitica, is responsible for the widespread death of Chestnut trees in North America occurring in the early twentieth century (1). Because of the detriment that this severe pathogen brought to American Chestnuts, researchers and environmentalists have sought ways to relieve the problem, most notably through the study of the role of the mycovirus CHV-1, or Cryphonectria hypovirus, as a biological control agent, as previously discussed (7). Cryphonectria hypovirus naturally evolved with both Asian and European Chestnut…

Mitchell Saunders Mrs. Whitmire AP Environmental Science 4th Period 11 October 2014 The Woolly Adelgid: A Forest Nuisance The woolly adelgid, or hemlock woolly adelgid (Adelgis tsugae), is a species of small insect native to Japan that infests eastern hemlock (Tsuga canadensis) and Carolina hemlock (Tsuga caroliniana) trees in the Eastern United States. The insect was first discovered in the United States in Richmond, Virginia around 1954. The infected trees were part of a park located on the…

around 15 to 45. The cones of the C. libani are produced individually at the very end of the trees short shoots. The male cones are greyish/green or red colour and cylindrical shape, which are about 3 to 5 centimetres long. The female cones are rounded and measure 5 to 12 cm in length and 3 to 6 cm in width. The cones turn from green to brownish shade when they are mature. Photograph 5: American chestnut, Castanea dentate (Marsh.) Borkh. (Castanea dentate, 2017) Castanea dentata is a fast…

must be treated to kill wood-boring insects (Alsop), but for the ash trees it may already be too late. The Emerald Ash Borer is seemingly unstoppable, and is now considered the most destructive forest pest in North America’s history (Emerald). In southeastern Michigan alone, over 60 million ash trees have already been killed, with ash mortality rates reaching as high as 99 percent (McCullough). Exacerbating the problem is the fact that some communities planted large numbers of ash trees in the…