Risk Assessment of Cyclaniliprole Resistance in Peach-Potato Aphid Myzus persicae: Laboratory Selection, Inheritance,...

Area of Science:

• Agricultural Entomology
• Insecticide Resistance
• Pest Management

Background:

• Cyclaniliprole, a third-generation anthranilic diamide insecticide, is used for pest control.
• Myzus persicae (peach-potato aphid) is a significant global agricultural pest.
• The resistance risk of cyclaniliprole in M. persicae populations is not well understood.

Purpose of the Study:

• To assess the risk of cyclaniliprole resistance development in Myzus persicae.
• To evaluate cross-resistance patterns and fitness costs associated with cyclaniliprole resistance.
• To inform effective management strategies for M. persicae using cyclaniliprole.

Main Methods:

• Selection of M. persicae with cyclaniliprole for 26 generations.
• Quantification of resistance levels and cross-resistance to imidacloprid.
• Measurement of realized heritability and fecundity.
• Analysis of ryanodine receptor mRNA expression.

Main Results:

• A 2.56-fold increase in cyclaniliprole resistance was observed after 26 generations.
• Low cross-resistance (4.2-fold) to imidacloprid was detected in the selected strain.
• Realized heritability of resistance was low (0.0362), suggesting slow resistance evolution.
• No significant difference in fecundity was found between susceptible and resistant strains.
• Enhanced mRNA expression of the target ryanodine receptor was observed.

Conclusions:

• Cyclaniliprole resistance in M. persicae develops slowly, with minimal cross-resistance to imidacloprid.
• The absence of significant fitness costs associated with resistance is notable.
• These findings support the judicious use of cyclaniliprole for effective M. persicae management.