Synergism of Diflubenzuron and Teflubenzuron in Larvae of Beet Armyworm (Lepidoptera: Noctuidae)
Authors: LAECKE, VAN K.; DEGHEELE, D.
Source: Journal of Economic Entomology, Volume 84, Number 3, June 1991 , pp. 785-789(5)
Publisher: Entomological Society of America
Abstract:Spodoptera engua (Hubner), a serious lepidopterous pest in greenhouse crops in the Netherlands, is rather insensitive to the chitin synthesis inhibitor dHlubenzuron. The LC", for fourth and fifth instars treated with diflubenzuron were 295 and 16 mg/liter, respectively; for teflubenzuron, LC",'s were 42 and 7 mg/liter, respectively. To optimize the use of benzoylphenyl urea in S. exigua larvae, a combination with four synergists was studied. The best results were obtained with profenofos and S,S,S-tributylphosphorotrithioate (DEF), both of which are hydrolase inhibitors. These synergistsenhanced the toxicity of diflubenzuron in fourth instars nine and six fold, respectively. Diethylmaleate, a glutathion S-transferase inhibitor, decreased the LC", five fold, whereas piperonyl butoxide, an oxidase inhibitor, was responsible for only a three-fold reduction.
Document Type: Research article
Publication date: 1991-06-01
- 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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