The diseases and pests of the rubber tree . Fio. 25.—A fasciated stem, x J. quently developed have also been fasciated. This has notbeen observed in Ceylon, but it is possible that it might NON-PARASITIC DISEASES 191 happen if the top were pruned ofE close to the abnormal should be cut off about two feet FiQ. 26.—A fasoiated stem. Twisted Seedlings Nursery plants with stems twisted at the base are offrequent occurrence. In the most general case the stem 192 THE RUBBER TREE chap. makes a complete turn, either in a regular curve (see tlie fifthfrom the left in Fig. 27), or in a c
The diseases and pests of the rubber tree . Fio. 25.—A fasciated stem, x J. quently developed have also been fasciated. This has notbeen observed in Ceylon, but it is possible that it might NON-PARASITIC DISEASES 191 happen if the top were pruned ofE close to the abnormal should be cut off about two feet FiQ. 26.—A fasoiated stem. Twisted Seedlings Nursery plants with stems twisted at the base are offrequent occurrence. In the most general case the stem 192 THE RUBBER TREE chap. makes a complete turn, either in a regular curve (see tlie fifthfrom the left in Fig. 27), or in a combination of curvesand abruptly angular bends; in other cases there are twocomplete turns, and in a single instance three have beenobserved. The curves are rarely all in the same direction,and the resulting combination is frequently so complicatedthat analysis fails to afford any adequate explanation. Itmay be noted that the examples given here had been grownin free soil, and do not owe their origin to the presence ofstones in the nursery. As a rule, these twisted plants are discovered when theyare about to be planted out in the field ; at that time the coUsare generally fused together, and would ultimately, if theplants had been allowed to grow, have formed a solid mass atthe base of the stem. The specimens
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