Response of three pines to parasitism by Helicotylenchus digonicus (Nematoda: Hoplolaimidae)

Abstract
Experiments, carried out to verify the parasitic action of Helicotylenchus digonicus on Pinus strobus and P. excelsa and their hybrid, indicate a positive host‐parasite relationship. In general the consequences of nematode feeding is a reduction of seedling development similar to that induced by the absence of mycorrhizae.