Bifenthrin resistance in Dalbulus maidis (Hemiptera: Cicadellidae): inheritance, cross-resistance, and stability.

ABSTRACT:

Background

Pyrethroid insecticides have been a primary strategy for managing Dalbulus maidis (Hemiptera: Cicadellidae) in Brazil. Howeve, failures in the control of D. maidis with pyrethroids have been reported. In this study, we selected a bifenthrin-resistant strain of D. maidis under laboratory cage conditions to investigate the inheritance pattern of resistance, cross-resistance to other insecticides, and resistance stability.

Results

The estimated LC₅₀ of the Bif-R was 2,055.72 μg a.i. mL^-1, while that of the susceptible (Sus) strain was 0.64 μg a.i. mL^-1, resulting in a 3,170-fold resistance ratio (RR). Reciprocal crosses (H1: Bif-R ♀ × Sus ♂ and H2: Bif-R ♂ × Sus ♀) and backcrosses between heterozygous H1 and H2 with the Sus strain ind

SUBMITTER: Dias GS 

PROVIDER: S-EPMC12268804 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature