Other Contributions: Depth of Penetration of Phytoparasitic Nematodes in Yam Tubers

Abstract

Phytoparasitic nematodes, especially Pratylenchus coffeae (Zimmermann), were concentrated mainly in the outer 6 mm of tissue, but penetration up to 15 mm was found in the Guinea yam tuber. The oldest portion, adjacent to the stems, contained the highest population while few specimens were recovered from the distal portion of the tuber.