Insect Damage to Conelets., Second-Year Cones.,and Seeds of Ponderosa Pine in Southeastern Nebraska

$28.00 plus tax (Refund Policy)

Buy Article:


Rhyacionia spp. and Retinia metallica (Busck) annually caused conelet losses (i(i ± SD)of 8.2 ± 3.0% and 5.4 ± 4.9%, respectively. Abortion and disappearance of conelets caused by Leptoglossus occidentalis Heidemann or physiological dysfunction averaged 65.7 ± 8.2% and were reduced by 13% when conelets were protected with screen cages. Survival of conelets averaged 19.5 ± 9.4%. Of those remaining, 76.8 ± 14.3% appeared healthy after the second growing season. Dioryctria spp. annually damaged an average of 14.2 ± 7.2% of the second-year cones. Mean annual seed potentials ranged from 77.4 to 127.1 seeds per cone, but mean annual seed yields ranged from only 0.4 to 8.1 filled seeds per cone. Caging cones to exclude L. occidentalis increased seed yield and efficiency and decreased damaged and empty seed. Feeding by L. occidentalis damaged an estimated 41% of initial ovules in cones harvested in 1985. Thus, insects can significantly reduce cone production and seed yield of ponderosa pine in southeastern Nebraska.

Document Type: Research Article

Publication date: December 1, 1988

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.
  • Editorial Board
  • Submit a Paper
  • Subscribe to this Title
  • Information for Advertisers
  • Visit this journal's homepage
  • ingentaconnect is not responsible for the content or availability of external websites
Related content



Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more