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Variation in Leaf Development and Dry Matter Yield Among Kenaf Varieties and Introductions¹

Eight kenaf (Hibiscus cannabinus L.) entries, including five Russian introductions and three Western Hemisphere varieties, were compared in two planting dates at two locations for difference in leaf accumulation and dry-stem yield. One introduction, P.I. 343142, produced more leaves than any Western Hemisphere variety at both locations for both early and late planting dates. No entry x planting date interaction for leaf accumulation was found. Western Hemisphere varieties produced greater stem yields at both locations and for both planting dates. Stem yields were correlated with leaf accumulation only in the late planting at the northernmost location.

Key Words: Hibiscus cannabinus L. • Paper pulp source

² Plant Geneticist, Agronomist, and Plant Physiologist, PSRD, ARS, USDA, Savannah, Ga.; Beltsville, Md.; and Glenn Dale, Md., respectively.

Received for publication October 23, 1971.