title: Novaluron (Rimon), a novel IGR: potency and cross-resistance.
abstract: The potency of novaluron on laboratory susceptible and field strains of S. littoralis resembles that of chlorfluazuron and both compounds are about 20-fold more potent than teflubenzuron. No appreciable resistance to novaluron or chlorfluazuron was observed in a field strain of Spodoptera littoralis collected from cucumber field in the central part of Israel. On the other hand, the field strain showed a mild resistance of about 4-fold to teflubenzuron as compared to the laboratory susceptible strain. A very resistant colony of Bemisia tabaci to pyriproxyfen (1,200- to 2,000-fold) showed no appreciable cross-resistance to novaluron. Two field colonies of B. tabaci pressurized with acetamiprid or thiamethoxam for 22 generations, resulting in a 30- to 50-fold resistance to acetamiprid and thiamethoxam, has no cross-resistance to novaluron. The above results are of special interest, indicating a possible alternation between novaluron, pyriproxyfen, and neonicotinoids in insecticide-resistance management programs aiming at preventing resistance development to these novel groups of insecticides against important pests such as whitefly and lepidopteran species.
authors.affiliation: Department of Entomology, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel. vpisha@volcani.agri.gov.il
authors.forename: Isaac
authors.initials: I
authors.lastname: Ishaaya
authors.forename: Svetlana
authors.initials: S
authors.lastname: Kontsedalov
authors.forename: A Rami
authors.initials: AR
authors.lastname: Horowitz
mesh_terms: D000691:Anabasine / Q000031:analogs & derivatives; D000818:Animals; D001681:Biological Assay; D004347:Drug Interactions; D006430:Hemiptera; D007305:Insecticide Resistance; D007306:Insecticides; D010572:Pest Control, Biological / Q000379:methods*; D010671:Phenylurea Compounds; D010944:Plants; D011725:Pyridines; D018411:Spodoptera; D018675:Toxicity Tests / Q000379:methods
chemical_list: D007306:Insecticides; D010671:Phenylurea Compounds; D011725:Pyridines; C055613:pyriproxyfen; D000691:Anabasine; C471805:novaluron