First report of Heterodera glycines on soybean in Puerto Rico
Heterodera glycines (EPPO A1 quarantine pest) is reported for the first time from Puerto Rico. The nematode was found in February 1998, in a winter nursery of soybean (Glycine max) at the USDA's Isabela farm. Soybean has been grown in this field for 25 consecutive years (one crop each year with a summer fallow period between winter nursery seasons). However, no cysts were found when soil and roots were randomly sampled from other soybean fields in Puerto Rico (Isabela, Salinas, Lajas, Juana Diaz), as well as in neighbouring fields. Sorghum was planted in the infested field in summer 1998 as a rotation, and soybean was planted again in 1998-1999 in a winter nursery.
Sources
Smith, J.R.; Chavarria-Carvajal, J.A. (1999) First report of soybean cyst nematode Heterodera glycines on soybean in Puerto Rico.
Plant Disease, 83(6), p 591.