Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Some polyphagous Homoptera gain protection from their natural enemies by feeding on the toxic plants Spartium junceum and Erythrina corallodendrum (Leguminosae).

Abstract

Interactions were studied among alkaloid-containing legumes (Erythrina corallodendrum and Spartium junceum) and non-toxic plants, several polyphagous Homoptera (Aphis craccivora, Icerya purchasi, I. aegyptica, Lepidosaphes ulmi and Planococcus citri) and some natural enemies of these pests (the predators Rodolia cardinalis, Chilocorus bipustulatus, Cryptolaemus montrouzieri, Chrysoperla carnea and Sympherobius sanctus and the parasitoid Encyrtus infelix) in the laboratory (and field) in Israel. Evidence was found that the efficiency of natural enemies may be reduced by sequestration of plant alkaloids by their prey (or hosts) or their transfer into their excreted honeydew.