Insects Destructive to Bitter brush Flowers and Seeds In Southwestern Idaho1
Authors: FERGUSON, ROBERT B.; FURNISS, MALCOLM M.; BASILE, JOSEPH V.
Source: Journal of Economic Entomology, Volume 56, Number 4, August 1963 , pp. 459-462(4)
Publisher: Entomological Society of America
Abstract:Studies were conducted to identify and evaluate the insects associated with Flowers and seeds of bitter brush. A 1.5 % lindane emulsion spray was applied to reduce insect infestation on bitter brush shrubs but proved to be phytotoxic. A 2% DDT emulsion spray was substituted but also caused some injury.
Six hundred flowers were selected for weekly observation on 10 sprayed shrubs and the same number on 10 unsprayed shrubs. Normal-appearing seeds resulted from 21 to 25 % of the flower buds on sprayed and unsprayed shrubs, respectively. Production of fewer normal seeds on sprayed shrubs indicates that the phytotoxic effect of DDT added to or exceeded the effects of insects.
Causes of damage to flowers and seeds were determined by weekly examinations and dissections until June 26, when seed drop began. During the bud and flower stages, a thrips, Frankliniella occidentalis (Pergande), caused most identifiable damage. After seeds had formed and were still attached to the shrubs, a gall midge, possibly Phytophaga sp., led other insects in amount of seed destroyed, followed by the gelechiid, Filalima sp. near sperryi Clarke. Additional, less conspicuous damage possibly may result from punctures made by sucking insects, among which the pentatomid bug, Chlorochroa sayi Stal, was identified as a common seed feeder.
Document Type: Research Article
Publication date: August 1, 1963
- 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