publication . Thesis . 1986

Japanese beetle Popillia japonica Newman: foliar feeding on wine grapes in Virginia

Boucher, T. Jude;
Open Access English
  • Published: 01 Jan 1986
  • Publisher: Virginia Polytechnic Institute and State University
  • Country: United States
Abstract
The natural infestation level for 1985 of the Japanese beetle, Popillia japonica Newman, in the Shenandoah Valley of Virginia failed to reduce berry quality, yield or shoot growth in a commercial vineyard. Intensive postveraison foliage feeding by Japanese beetle resulted 1n fruit with lower soluble solids and higher total titratable acidity at harvest, but did not affect pH, sugar per berry, berry weight, yield, leaves per vine or shoot length. Intensive previraison feeding also resulted in fruit with higher total titratable acidity. All other parameters were unaffected. In a separate experiment with 0, 10, 20, and 33% leaf removal, no relationship was shown be...
Subjects
Medical Subject Headings: food and beveragesfungi
free text keywords: LD5655.V855 1986.B682, Japanese beetle, Grapes -- Diseases and pests -- Virginia, Grapes -- Physiology
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Thesis . 1986
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