. Contributions from the Laboratory of Plant Genetics. ..• ^ ..~ .~~ '.^ ^ ^ SHOWING ROUND TIP'S GREATER RESISTANCE TO ROOT ROT These are the roots of average plants taken from one field infected with root rot. Those on the outside are Round Tip and those on the inside Havana tobacco. The grower demanded a plant resistant to disease, and one which would stand up under wind and rain—qualities which are prominent in the new tobacco. (Fig. 4.). ROUND TIP TOBACCO LEAVES In comparing these leaves of the new hybrid with those of the two parents shown in Figs. 1 and 2, the immense increase in cigar w


. Contributions from the Laboratory of Plant Genetics. ..• ^ ..~ .~~ '.^ ^ ^ SHOWING ROUND TIP'S GREATER RESISTANCE TO ROOT ROT These are the roots of average plants taken from one field infected with root rot. Those on the outside are Round Tip and those on the inside Havana tobacco. The grower demanded a plant resistant to disease, and one which would stand up under wind and rain—qualities which are prominent in the new tobacco. (Fig. 4.). ROUND TIP TOBACCO LEAVES In comparing these leaves of the new hybrid with those of the two parents shown in Figs. 1 and 2, the immense increase in cigar wrapper surface is plainly shown. These are bottom, middle and top leaves from a Round Tip plant. Wrappers made from Round Tip leaves cannot be distin- guished from the high grade Sumatra wrappers. (Fig. 5.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bussey Institution. Boston : [s. n. ]


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