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Arboriculture & Urban Forestry

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Arboriculture & Urban Forestry (AUF) May 1977, 3 (5) 97; DOI: https://doi.org/10.48044/joa.1977.3.5.97
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Gardiner, L.M. 1976. Tests of an introduced parasite against the native elm bark beetle. Bi-monthly Research Notes, Canadian Forestry Service 32(2): 11.

At the northerly limit of its range in North America, Dutch elm disease is spread almost solely by the native elm bark beetle, Hylurgopinus rufipes. Indigenous parasites do not seem to be effective in controlling populations of this beetle. A European braconid, Dendrosoter protuberans has been introduced in the United States in recent years and is reported to be established in Wayne County, Michigan and possibly in Missouri. This is the most common parasite of the smaller European elm bark beetle, Scolytus multistriatus in Europe and was introduced in an attempt to control this beetle in the United States. It seemed worthwhile to test D. protuberans against H. rufipes in central Ontario where the beetle parasite niche seems to be inefficiently filled.

Weatherston, J. 1976. A new insect trap for use with Lepidopteran sex heromones. Bi-monthly Research Notes, Canadian Forestry Service 32(2): 9-10.

The use of sex-pheromone baited traps in the monitoring of management of populations of lepidopteran agricultural or forest pests, is affected by several factors including availability of the synthetic pheromone, type of pheromone dispenser, release rate, and trap design. Improvements in trap design that led to the patenting of the Astrotrop were increased access to the trap by flying insects while still maintaining a large trapping surface, increased service life by making the trap reversible because the majority of moths are trapped on the lower half of type 3 traps. These improvements were accomplished by making the trap from flexible sheets of plastic laminated paper.

  • © 1977, International Society of Arboriculture. All rights reserved.
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Arboriculture & Urban Forestry (AUF)
Vol. 3, Issue 5
May 1977
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Arboriculture & Urban Forestry (AUF) May 1977, 3 (5) 97; DOI: 10.48044/joa.1977.3.5.97
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