Lethal and sublethal effects of newer insecticides on Chrysoperla johnsoni and Chrysoperla carnea (Neuroptera: Chrysopidae)

This study compared lethal and sublethal effects of reduced-risk and organophosphate-replacement insecticides (chlorantraniliprole, cyantraniliprole, spinetoram, novaluron and lambda-cyhalothrin), on adult and second instars of two green lacewing species, Chrysoperla johnsoni Henry, Wells and Pupedis (North American spp.) and Chrysoperla carnea (Stephens) (European spp.) (Neuroptera: Chrysopidae) in the laboratory.  Formulated pesticides were tested using concentrations equivalent to the high label rate dissolved in 378.5 L of water.  All insecticides tested were toxic to C. johnsoni and C. carnea either at the immature or adult stage or both.  Results of this study demonstrate a similarity between C. johnsoni and C. carnea for pesticide toxicity irrespective of their varied geographical distributions.

Key words            biological control, generalist predator, green lacewing, reduced-risk insecticides, OP-replacement insecticides