Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Peronospora disease (Plasmopara helianthi Novot.) of sunflower: physiologic races of the parasite and methods of identifying infected material.

Abstract

Italian commercial hybrids containing the gene Pl2 are resistant to races 1 and 2 of P. helianthi [P. halstedii], but not to race 3 (not recorded in Italy so far). The possibility of using the ELISA method to detect affected material is discussed.