no 



Treatment. 



It has been recommended that all of the dead and badly diseased 

 seedlings, be collected and burnt to prevent the spread of the disease 

 by the spores produced on diseased parts. 



A better access of light to the seedlings has also been advised. 



For the control of the disease it has been recommended that the 

 seedlings in diseased areas be sprayed with Bordeaux Mixture, the 

 6 — 4 — 50 formula being employed for preparation of the mixture, 

 and the mixture being applied as a preventitive. 



A diagnosis of the fungus is appended : — 



Maculis amphigenis, subrotundatis vel irregularibus, brunneia ; 

 peritheciis saepius epiphyllis, sparsis, initio epidermide velatis, 

 nigris, membranaceis, globoso-depressis, 90-IOO microns diamr., 

 ostiolo obsoieto; ascis clavulatis, sessilibus, aparaphysatis, octos- 

 poris, 32 — 36 X 8 microns; sporis oblongis, utrinque obtusis, continuis, 

 hyalinis, subdistichis, 10 — 12 x 3.5 — 4 microns. 



A THREAD. BLIGHT ON PARA RUBBER, 

 CAMPHOR, Etc. 



By Keith Bancroft, b.a., Assistant Mycologist, F.M.S. 



A disease which from its symptoms may well be called a " thread- 

 blight" has recently made its appearance on Para rubber and 

 camphor {Cin/mnioniuni Caniphora). The disease was first recorded on 

 camphor, seven years old, in the Experimeatal Gardens at Batu Tiga 

 (Selangor) where four adjacent plants were affected. Within a few 

 days from this it was reported on Para rubber trees on an Estate in 

 Negri Sembilan. The affected Para rubber trees were approximately 

 seven or eight years old, were near to each other and were situated 

 close to a belt of virgin jungle. 



Symptoms. 



When a tree is attacked the leaves on the younger parts wither 

 and hang down and may become matted together in dense masses. 

 The younger twigs also wither and the young buds die. Finally, as 

 he disease progresses many of the leaves fall. 



