Effect of the Insect Growth Regulators Diflubenzuron and Methoprene on Scale Insects

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Abstract:

Larval stages of 2 diaspids, Chrysomphalus aonidum (L.) and Aonidiella aurantii (Maskell), and 2 coccids, Saissetia oleae (Olivier) and Ceroplastes floridensis Comstock, were sprayed with the insect growth regulators diflubenzuron and methoprene. No effect of diflubenzuron on the development of the insects tested was noticed. Methoprene at a concentration of 0.015% inhibited emergence of male C. aonidum when applied to 1st or 2nd instars, and at 0.1% prevented emergence of male A. aurantii when treated as 2nd instars. Development of female C. aonidum treated as 1st instars was inhibited after application of 0.05% methoprene. Females of the 2 armored scales were not affected when subjected to methoprene as 2nd instars. The development of S. oleae and C. floridensis, which are uniparental in Israel, was severely affected by methoprene treatment at a concentration of 0.015 and 0.03%, respectively.

Document Type: Research Article

Publication date: February 1, 1981

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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