EFFECT OF HELICOTYLENCHUS DIHYSTERA (COBB) SHER ON GROWTH OF COCOA SEEDLINGS

YUEN PAK MUN

SUMMARY

An initial inoculum level of 2,800, 3,500 and 1,200 Helicotylenchus dihystera did not significantly depress growth of Upper Amazon seedlings after 4½ months in the following variables: dry weight of leaves, stem and roots, total dry weight , leaf number and plant height. Final soil population of nematodes excceded numbers usually encountered in cocoa plantings.

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