Effect of a new insect growth regulator,RO 13-5223, on scale insects |
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| Authors: | B A Peleg |
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| Institution: | 1. The Israel Cohen Institute for Biological Control, Rehovot
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| Abstract: | Immature stages of two diaspids,Chrysomphalus aonidum (L.) andAonidiella aurantii (Maskell), and two coccids,Saissetia oleae (Olivier) andCeroplastes floridensis Comstock, were sprayed with the insect growth regulator (IGR) RO 13-5223 ethyl 2(p-phenoxyphenoxy) ethyl carbamate]. Development of first and newly transformed second nymphs of both male and femaleC. aonidum was inhibited at a concentration of 0.0125%; mature 2nd female nymphs were not susceptible to treatment at 0.025%. The chemical did not arrest the development of treated mature 2nd female nymphs ofA. aurantii. When nymphs ofA. aurantii were sprayed with the IGR as 1st and newly transformed 2nd stages, emergence of males was inhibited, while females were markedly less affected. The development ofS. oleae immature stages as well as of 1st and 2nd nymphs ofC. floridensis was completely arrested by RO 13-5223 treatment at a concentration of 0.006%. |
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