. Cooperative economic insect report. Insect pests Control United States Periodicals. 39 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES WINTER MOTH (Operophtera brumata (L.)) Economic Importance: This pest was first known to be present in North America in 1949 when it was found in Nova Scotia, Canada. Apparently it was well established in the area by that time and it has continued to spread within the Province. Severe defoliation has occurred on such major hosts as apple, oak, maple, elm and basswood. A local outbreak at Grand Pre in 1955 caused about 80 percent defoliation of un- treated a
. Cooperative economic insect report. Insect pests Control United States Periodicals. 39 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES WINTER MOTH (Operophtera brumata (L.)) Economic Importance: This pest was first known to be present in North America in 1949 when it was found in Nova Scotia, Canada. Apparently it was well established in the area by that time and it has continued to spread within the Province. Severe defoliation has occurred on such major hosts as apple, oak, maple, elm and basswood. A local outbreak at Grand Pre in 1955 caused about 80 percent defoliation of un- treated apple orchards and various hardwood species. Insecticides were necessary against this insect and the fall cankerworm in many orchards during 1956 to prevent serious defoliation and marring of fruit. Winter moth has been recognized as a major pest of fruit and forest trees for many years in areas of the Old World. An outbreak in central Poland in 1935-36 caused complete defoliation of forest trees. Hazel trees are sometimes severely defoliated in extensive areas of Italy. Serious losses on fruits are recorded in the British Isles, Denmark, Czechoslovakia, Algeria and parts of USSR. Loss from the pest amounted to 90,000 pounds sterling in the Vistula region of Germany between 1916-20. Studies in Holland between 1941-43 showed 0. brumata was the most harmful insect on cherry flowers in that Damage to cherries and hazel twig by Operophtera Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Branch; United States. Plant Pest Control Division; United States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs. Washington, D. C. : U. S. Dept. of Agriculture, Agricultural Resear
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