Control of Maple Leaf Cutler, Paraclemensia acerifoliella, by Aerial Spraying1

Connola, D. P.

doi:10.1093/jee/53.5.957a

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1983

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“…The insect is widely distributed in Vermont; aerial surveys revealed that about 24,000 ha were heavily infested in 1978. Damage by this defoliator lowers tree vigor and reduces the sugar content of the sap (Connola 1960). Population estimates for economic thresholds and damage correlations require leaf samples during the active feeding stages.…”

Section: Resumementioning

confidence: 99%

POPULATION DISTRIBUTION OF THE MAPLE LEAFCUTTER, PARACLEMENSIA ACERIFOLIELLA (LEPIDOPTERA: INCURVARIIDAE), IN SUGAR MAPLE TREES

et al. 1983

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Leaf samples were taken from crowns of sugar maple trees at selected vertical and horizontal positions and at each cardinal point. No significant differences in numbers of mines, cuts, or cases of Paraclemensia acerifoliella (Fitch) were observed among the cardinal points of the crown. Most of the mines were found on leaves located near the base of the crown and close to the tree bole. Significantly more mines/leaf were found on samples 0.6 and 1.2 m from the bole than at 2.4 m and outward to the edge of the foliage. The highest number of cases/leaf was found 1.2 m from the bole. One and two months after the leaf-mining stage both case-bearing larvae and leaf damage were more prevalent from the bole outward to a distance of 3 m.

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Section: Resumementioning

confidence: 99%