Sawfly (Hymenoptera: Diprionidae) and Artificial Defoliation Affects Above- and Below-Ground Growth of Ponderosa Pine Seedlings

Authors: SANCHEZ-MARTINEZ, GUILLERMO; WAGNER, MICHAEL R.

Source: Journal of Economic Entomology, Volume 87, Number 4, August 1994 , pp. 1038-1045(8)

Publisher: Entomological Society of America

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Abstract:

A study was conducted to determine the effect of artificial and insect defoliation on above- and below-ground growth of ponderosa pine seedlings (Pinus ponderosa Douglas ex Laws.). Two different pine genotypes either had needles artificially removed over time to simulate defoliation by sawflies (Neodiprion gillettei Rohwer) or were allowed to be fed on by sawflies. Results showed that the growth of stems and roots were similar under artificial and insect defoliation. Above- and below-ground growth was reduced in proportion to the amount of foliage removed. The root:shoot ratio was not affected. The two pine genotypes responded differently to defoliation.

Document Type: Research Article

Publication date: August 1, 1994

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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