Canada

Canada figures in the book as a place where forest protection and the health of rivers and fisheries came into direct conflict. The Northwest Miramichi watershed became part of a vast government spraying campaign against spruce budworm, and the account follows the consequences beyond the trees the program was designed to save: DDT entered aquatic life, threatening fish and the future of salmon fisheries in New Brunswick. The Canadian case also serves as a warning that a temporary control measure can leave enduring effects, even when officials reduce the dose.

Forest Protection and the Spraying Program

The Northwest Miramichi was included in a Canadian Government program begun the previous year to save forests from spruce budworm, a native insect that attacks several kinds of evergreens. The spraying was framed as a stopgap: the objective was to prevent trees from dying after several successive years of defoliation. But the scale of the intervention meant the watershed itself became part of the control operation, carrying its consequences beyond the targeted insect and forest.

The book sets the Canadian campaign within a wider debate over chemical control. Forests and cultivated fields were being sprayed, and towns and cities were also subject to aerial distribution of lethal chemicals. Against that expanding practice, the Northwest Miramichi episode makes a specific landscape legible: a forest pest-control measure could also threaten the river system on which salmon depended.

DDT, Fish, and the Cost of a Stopgap

The account stresses that the program’s side effects would continue to be felt as spraying continued. In response to concerns about fish destruction, Canadian forestry officials, following a recommendation from the Fisheries Research Board of Canada, reduced the DDT application rate from half a pound to a quarter pound per acre. The comparison with the United States, where the standard one-pound-per-acre rate still prevailed, underscores that the Canadian adjustment was a reduction, not an end to the chemical intervention.

That adjustment did not remove the underlying conflict. The campaign was intended to avert forest damage over successive years, but its continued use carried an acknowledged risk to fish. The book therefore treats the lower concentration not as a resolution but as evidence that officials were attempting to limit damage within a program whose ecological costs remained present.

The Future of the Salmon Fisheries

The consequences extend beyond the immediate effects of spraying. The book warns that the future of New Brunswick’s salmon fisheries might depend on finding a substitute for drenching forests with DDT. In this formulation, the watershed is not merely the setting for a forestry operation: it is a connected environment where the method chosen to protect evergreens may imperil a valuable fishery.

Canada’s case also complicates any assumption that the problem was confined to one region. The book says the eastern Canadian situation was not unique, although the extent of forest spraying there and the wealth of collected facts made it especially revealing. Maine, too, had spruce and balsam forests, forest insects to control, and salmon runs. The comparison turns the Northwest Miramichi from an isolated incident into a warning about the broader consequences of spraying forests that share their waters with fisheries.