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Remedial axd Preventive Measures. 



It is of the utmost importance to detect the first brood, 

 and report is immediately. The greatest mistake that can 

 be made is to allow the insect to increase and report the 

 disease at the third brood. At a small cost, and before 

 much damage has been caused to the trees it can be stopped 

 during the first brood, while if allowed to increase for three 

 consecutive broods it is next to impossible to prevent fur- 

 ther ravages. Kerosine Emulsion was found to be far 

 more effective than London Purple, although I am unable 

 to state what quality of London Purple was used. Under 

 any circumstances spraying with kerosine emulsion has the 

 additional advantage of killing the scale insects with which 

 the coconut trees in the Federated Malay States are so fre- 

 quently infected. 



The solution was as follows: — 



Dissolve the J f lb. soap in the 1 gallon of water by heat- 

 ing. When thoroughly dissolved add water slowly while 

 boiling hot to the kerosine. Churn thoroughly for 10 

 minutes while and after adding water. Dilute with 10 

 parts of water when cool. 



If this mixture is applied by a sprayer to the trees both 

 the larvae and the scale insects present on the coconut trees 

 will be killed. With large broods a considerable amount 

 of good may be done with coconuts of 5-7 years of age by 

 killing the moths. They may be caught in thousands in 

 butterfly nets by sweeping the nets along the edges of the 

 leaves. This must be done before the eggs are laid. It 

 will further reduce the next brood if the time of the egg lay- 

 ing is carefully watched and when the eggs are found in- 

 structions should be given to the coolies to cut off the tips 

 (for about a yard) of the lower coconut leaves. The cut 

 portions of the leaves may be made into small piles where 

 the heat of the sun will soon dry them and prevent the 

 young larvae from maturing. 



The most important object however should be to detect 

 the first appearance of this pest and it must be reported 

 immediately if the best and most effective results are 

 sought. 



Kerosine 



Water 



Soap 



