title: Efficacy of layer treatment with methoprene for control of Rhyzopertha dominica (Coleoptera: Bostrychidae) on wheat, rice and maize.
abstract: BACKGROUND
  Insect growth regulators are promising alternatives to traditional pesticides in stored grain. The efficacy of the juvenile hormone analogue methoprene was evaluated as a layer treatment in a laboratory experiment for control of Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) in wheat, rice and maize.
  
  
  RESULTS
  Adults of R. dominica were placed in vials containing 33, 26 and 29 g (to a depth of 6.5 cm) of wheat, rice and maize, respectively, that was entirely or partially treated with 1, 5 or 10 mg kg(-1) methoprene. In wheat and rice, the layer treatments were not as effective as the whole-grain treatment, but there was decreased progeny production as the application rate increased. However, on maize the partial treatments were as effective as the whole-grain treatment at 5 and 10 mg kg(-1) .
  
  
  CONCLUSIONS
  The results suggest that partial layer treatments with methoprene can be used to control R. dominica on maize but may not be effective for control of this species on wheat and rice.
authors.affiliation: Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Development, University of Thessaly, N. Ionia, Magnesia, Greece. athanassiou@agr.uth.gr
authors.forename: Christos G
authors.initials: CG
authors.lastname: Athanassiou
authors.forename: Frank H
authors.initials: FH
authors.lastname: Arthur
authors.forename: James E
authors.initials: JE
authors.lastname: Throne
mesh_terms: D000818:Animals; D001517:Coleoptera / Q000187:drug effects* / Q000254:growth & development; D008726:Methoprene / Q000494:pharmacology*; D012275:Oryza / Q000469:parasitology*; D010571:Pest Control / Q000379:methods*; D010935:Plant Diseases / Q000469:parasitology*; D014908:Triticum / Q000469:parasitology*; D003313:Zea mays / Q000469:parasitology*
chemical_list: D008726:Methoprene