The diseases and pests of the rubber tree . hows a specimen in which one side especiallyhas executed numerous turns before finally expanding. The example shown in Fig. 26 is formed by the gradualthinning out of the stem on one side, instead of down themiddle, as in the more general case. Such one - sidedspecimens are not uncommon, but they are not usuallydeveloped to such an extent as the one photographed. Fasciation in some instances (other than Hevea) is due tothe attacks of insects or fungi, but in the majority of casesnothing definite can be stated except that they are certainlynot due to
The diseases and pests of the rubber tree . hows a specimen in which one side especiallyhas executed numerous turns before finally expanding. The example shown in Fig. 26 is formed by the gradualthinning out of the stem on one side, instead of down themiddle, as in the more general case. Such one - sidedspecimens are not uncommon, but they are not usuallydeveloped to such an extent as the one photographed. Fasciation in some instances (other than Hevea) is due tothe attacks of insects or fungi, but in the majority of casesnothing definite can be stated except that they are certainlynot due to either of those causes. There is no reason tobelieve that either insects or fungi are resppnsible for fascia-tion in Hevea. The abnormal tops should be cut ofi. If left alone thefasciated part of the stem dies, but before that happens a newshoot generally develops lower down the stem. It has beenstated that in Java cases have occm-red in which, after a 190 THE RUBBER TREE chap fasciated stem lias been cut off, tlie new shoots wliich subse-. 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 below.
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Keywords: ., bookcentury1900, bookdecade1920, bookidcu3192400285, bookyear1921
