108 



enclosed in a rough cocoon constructed of fibres of the food 

 plant (Fig. 124), without leaving the host plant. 



Control. The control of this insect is difficult when 

 the borers have become established within the tissues of the 

 plant. The adult weevils may, however, be very successfully 

 trapped. The stem or trunk of any of the palms commonly 

 attacked (cocoa-nut, gru-gru, etc.), if cut and left lying on 

 the ground, will attract the egg-laying weevils. Pieces of 

 the palm stems can be distributed through a cocoa-nut 

 cultivation where the weevils are numerous, and examined 

 from time to time for a few weeks until they are found to 

 contain the borers, when they should be destroyed. It must 

 be borne in mind, however, that any palms which have died 

 and are left standing will offer the same attractions to the 

 weevils as the trap pieces on the ground. All such trees 

 should be promptly cut down as soon as they are found to be 

 dead. If they a.re not already infested they may be used as 

 traps. It is of the greatest importance that all trap logs 

 and all dead and decaying trees of the kinds attacked by 

 this insect should be completely destroyed at intervals of 

 two or three months, so that the larvae in them should not 

 have sufficient time to mature and emerge as adult weevils. 



The larger moth borer of sugar-cane (Caxtnia licus, 



i25.f Larger moth borer. 



(Original.} 



