Present state of Schistocerca cancellata paranensis (Burm.) in the Argentine Republic. New data on its bioecology

Abstract

Some decades ago, Schistocerca cancellata paranensis (Burm.) showed all its phases apparently well defined. Nowadays, it does not attain the gregarious phase, probably because of the strict control of its populations; according to the prevailing conditions, it is found only as solitary or congregans. Five years of observations in the field and some tests and succesive rearing in laboratory permit the previous statement, and give data on the bionomics of the species.