Effect of Cone Feeding by Leptoglossus Occidentalis on Ponderosa Pine Seed Development

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The type of damage caused by the feeding of Leptoglossus occidentalis on ponderosa pine varies with the stage of development of the seed. When seeds are damaged before the seed coat hardens, the seeds collapse or develop only partly. Once the seed coat begins to harden, the seed coat will mature, but the female gametophyte becomes disorganized and shriveled. In laboratory studies, as much as 55 percent of the seeds were defective due to feeding by this insect.

Keywords: Hemiptera; Pinus ponderosa; seed insects

Document Type: Journal Article

Affiliations: Research Entomologist, Pacific Southwest Forest and Range Exp. Sta. Forest Serv., U. S. Dept Agr., Berkeley, California

Publication date: March 1, 1969

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