Canadian Forest Service Publications

A sampling technique for estimating numerical trends in larval populations of insect defoliators on conifers. II. Modification and operational use of the technique for extensive sampling of spruce budworm populations in Quebec. 1973. Martineau, R.; Benoit, P. Phytoprotection 54(1): 23-31.

Year: 1973

Issued by: Laurentian Forestry Centre

Catalog ID: 15644

Language: English

Availability: PDF (request by e-mail)

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Abstract

An improved model of an apparatus and a technique for determining larval population levels on branches were developed and used operationally during spruce budworm spray programs in Qu├ębec during 1971. The new apparatus was found to be easily portable, compact and inexpensive. The technique provided considerable savings in time, cost and manpower requirements when compared with the visual branch examination method used in other years.