Looking for updates and to follow the progress of the research? Lead researcher Dr. Rob Johns (Natural Resources Canada) and his team will provide project status updates on testing, results, analysis and updates on spruce budworm populations throughout the course of the project.
As trees become old or ‘overmature’, many become more susceptible to insects and diseases.
One of the major hypotheses generated during the early work of spruce budworm during the 1950’s was that outbreaks rose as trees matured and became a better food source for feeding spruce budworm larvae (aka the ‘Silvicultural’ hypothesis). Such increases in tree nutritional quality were speculated to allow populations to rise more quickly, thereby outstripping the ability of predators to exert control. The characteristic 35 year cycles of spruce budworm outbreak were thought to reflect the approximate 30-35 years required for maturation in balsam fir and spruce.
April and May of 2014 have been busy months as we prepare for the upcoming spruce budworm studies in northern New Brunswick, about 60 km north of Edmundston (aka Hornes Gultch). This is the first region in New Brunswick where provincial surveys have detected more than a few overwintering spruce budworm larvae. The apparent rise of spruce budworm in this region is perhaps an indication of where the New Brunswick outbreaks might begin.
Although it was clear that spruce budworm had risen somewhat in the area, we were still uncertain how large and widespread the population was. To carry out some...
Spruce budworm is once again on the rise in eastern Canada.
Spruce and fir forests in Quebec have already been subjected to nearly 3.2 million hectares of moderate to severe defoliation by spruce budworm as of 2006. So far, densities remain low in the province of New Brunswick; however, a small outbreak has developed only 50 km or so north of the New Brunswick border and is expected to continue spreading.
With spruce budworm rising, the million-dollar questions are:
How can we best manage spruce budworm outbreaks? What are the best strategies and tactics to control spruce budworm that minimize potential environmental impact?