FORMATION OF NODULES. 
289 
(c) Nodules formed round areas into which latex has 
oozed and coagulated ; the coagulated latex occu- 
pies the intercellular spaces without lesion of tissue. 
May occur in any Hevea tree. 
{d) Nodules formed under unknown conditions round 
areas of cortex from which latex may be entirely 
absent. Rare. 
5. Globular shoots formed by the subsequent growth of 
latent buds after these have lost their connection with the 
stem occur in both tapped and untapped trees. They are 
distinguished from nodules by the absence of a core, and never 
form large masses of woody tissue as nodules do. 
6. Nodules do not occur on untapped trees. 
7. Nodules occur on Hevea in its native habitat in Brazil, 
and in Tropical America and the Eastern Tropics where it has 
been grown in plantations. 
8. The percentage of trees which develop nodules is very 
small. 
9. Tapping appears to induce nodule formation in pre- 
disposed trees. 
10. This abnormal condition is apparently not infectious. 
References. 
1. Akers, C. E.— -Report on the Rubber Industry of the 
Orient, 1912, p. 25. 
2. Akers, C. E. — Report on the Amazon Valley, 1912, pp. 76 
and 78. 
3. Bancroft, K. — The Occurrence of Burrs on the trunk of 
Hevea brasiliensis. Agric. Bull, of the Straits and Fed. Malay 
States, May, 1911, pp. 138-141. 
4. Bateson, E. — Bark-canker of Hevea in Java. Agric. 
Bull, of the Fed. Malay States, March, 1913, pp. 299-301. 
5. Bateson, E.- — Burr Formation, a preliminary Note. 
Agric. Bull, of the Fed. Malay States, July, 1913, pp. 446-449. 
6. Bateson, E. — Burr Formation. Agric. Bull, of the Fed. 
Malay States, August, 1913, p. 24. 
7. Bateson, E. — The Tapping of the Para Rubber Tree. 
Bulletin No. 23, Dep. of Agric., Fed. Malay States, 1914, pp. 43-48. 
8. Brooks, F. T. — Observations on some diseases of Planta- 
tion Rubber in Malay. Annals Applied Biology, Vol. II., No. 4, 
April, 1916, p. 222. 
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