Effects of Pyrifluquinazon on Nymphal Stages of Bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae)

Abstract

Pyrifluquinazon is a recently commercialized insecticide that interferes with chordotonal receptor neuron function. Eggs, first-instar nymphs, and mid-instar nymphs of Bemisia tabaci Middle East Asia Minor 1 (Gennadius) (Hemiptera: Aleyrodidae) were treated on cotton leaves with 0.057 g. ai./liter Pyrifluquinazon 20 SC in a growth room study. When 5-d-old eggs were treated, there was essentially no survival among emerging crawlers. When crawlers and first instars were treated, survival and development to subsequent instars was drastically reduced compared with the untreated control. Treatment of mid instars had no effect on mortality.