Cross-resistance relationships between dicofol and other acaricides recommended in citrus were evaluated in Brevipalpus phoenicis (Geijskes) to find alternative products for managing dicofol-resistant mites. Susceptible and dicofol-resistant B. phoenicis strains were tested against fenbutatin oxide, propargite, fenpyroximate and bromopropilate. Dicofol-resistant B. phoenicis showed positive cross-resistance to bromopropilate and negative cross-resistance to fenpyroximate. No cross-resistance was detected between dicofol and the acaricides fenbutatin oxide and propargite. Therefore, among the acaricides tested only bromopropilate should be avoided for managing dicofol resistance in B. phoenicis.
Citrus leprosis mite; Citrus sinensis; chemical control; resistance management
