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white or greyish in colour. When the effect of the disease is serious 

 the whole leaf becomes yellow and all leaves are affected, and 

 eventually the yellow colour changes to a greyish white and the 

 leaves wither. Sometimes only the latest formed leaf, not yet fully 

 opened, may be seen green and unaffected but this eventually dies 

 and with it comes the decay of the growing point or heart and the 

 death of the palm. 



Dead palms should be uprooted and all parts carefully burnt in 

 situ. Diseased leaves of affected palms may be cut away and burnt 

 and plants treated in this way should be carefully watched for 

 further signs of the disease. 



Fungicides may be applied by spraying but tliis is only advised 

 when nurseries are affected, moi'e as a preventive than a remedial 

 measure. Boi-deaux mixture should be used as the fungicide. 



Helminthosporium, sp.— This fungus has been found intermingled 

 with Pestalozzia and may contribute towards the general effect of 

 the disease. It is possible, also, that this fungus itself is tlie cause 

 of a disease similar to that of Pestalozzia palmarum though I have 

 no records that such is the case. 



Botryodiplodia sp. — In December of 1914 a disease was first 

 found in this country which 1 now attribute to a fungus, a species of 

 the genus Botryodiplodia. At one time I thought that this disease 

 was an exaggerated form of attack of Pestalozzia palmarum and in 

 a circular letter sent to members of the Association, dated 5th 

 February, 1915, I described the effect of this attack, but in a note at 

 the end of the letter added that Diplodia among other fungi was 

 found with the Pestalozzia and that I could not then say which 

 fungus was responsible for the full effect of the disease. This letter 

 together with photographs is published in "A Practical Guide to 

 Coconut Planting" by R. W. Munro and L. C. Brown. The first 

 noticeable sign of the disease is that distal end of a leaf withers and 

 droops, almost breaking away from the rest of the leaf at a point of 

 weakness, varying from one foot to three feet from the top, but 

 remaining attached, hangs directly downwards as a pendulous section. 

 These withered ends of the leaves on affected trees are most 

 characteristic in appearance. It is possible at first sight to mistake 

 these signs for attacks of brown beetles or leaf beetles but a cursory 

 examination will prove the presence or absence of the obvious signs 

 of the boz'ing of the beetle. The drooping end of the leaf is at first 

 yellow but finally' has tlie usual brown appeai'ance of a withered 

 coconut leaf. The fungus spreads into the lower part of the leaf 

 ti'avelling down the leaf -stalk and eventually the whole leaf becomes 

 yellow. 



As the fungus affects the tissue of the leaf-stalk a brown mark 

 is produced and is especially noticeable on the " lower " or " outer " 



