First report of Heterodera glycines lchinohe on soybean in Italy

Abstract

The soybean cyst nematode (SCN) Heterodera glycines was found in
three soybean fields near Pavia (ltaly) during the summer 2000. This quarantine
nematode was not known in Italy. The soybean plants were smaller, with "yellow
draft" disease, the roots were poorly developed and without or with few nitrogen
nodules. The population of SCN found was well established, and all stages were
recorded. Adult females and juveniles of H. glycines had high abundance. An
average of 59.5 cysts for 100 cm3 soil were recorded disease. The density of
population ranged from 7900 to 19200 SCN eggs/100 cm3 soil. This record
highlights a probable permanent establishment of this plant parasitic nematode in
North ltaly.