Codling-Moth Control in Fruit Sheds. 241 



The trap can be erected in any fruit storeroom, providing the 

 walls, up to a height of about two feet, are smooth and without 

 cracks, preferabjj- of brick covered with cement. Fruit growers who 

 have storerooms with walls of corrugated iron 7nay, with compara- 

 tively little expense, construct a low cement wall along all sides 

 of the room, to serve as a place of attacluuent for the trap. Jn order 

 that the trap may iiave maximum efficiency, the floor of the room 

 should be smooth and solid, preferably of cement. No boxes, tables, 

 or trays sliould be stored or left in the room, and the infested fruit 

 should l)e placed in a pile on straw on the floor, along the walls, 

 and kept there until ready to be cut up for drying, or fed to pigs. 

 No more infested fruit should be removed from this room than can 

 immediately be cut up. Infested cores, which result from the cutting 

 of the fruit, should either be placed in a recaptacle of boiling water 

 or caustic soda solution for a short time to kill surviving larvae, 

 or deposited in a square cement receptacle, open at the top, with the 

 trap plac&d along the walls, until carted away to be fed at or.ce to 

 pigs. 



The trap may be somewhat improved by having the narrow 

 board at least an inch thick, and the ceiling board so attached to 

 the narrow one that the top edge of the former is a little higher than 

 that of the latter. The tanglefoot may then be smeared only on the 

 top of the narrow board, the higher ceiling board thus preventing the 

 tanglefoot from running down the sides. Although there is not much 

 difficulty in pulling out the bagging in order to kill the larvae, get- 

 ting at the larvae which sometimes spin cocoons in the corners of 

 the boards, and frequently in the grooves along the lower edge of the 

 ceiling board, may be facilitated by having the ceiling board attached 

 to the narrow one by hinges or buttons for easily lifting the former 

 to remove the larvae. 



All larvae should be removed from the trap once every two and 

 a half weeks until the middle of February. After this time the larvae 

 need not be removed until the end of the fruit season, as they do not 

 develop into moths until spring. 



To make the most use of the trap, windfalls should be regularly 

 picked up and placed in the storeroom for infested fruit, and not left 

 on tho ground in the orchard, until larvae have escaped, a bad but 

 frequent practice. Picked fruit should be sorted in the packing room 

 as soon as possible after being carried to the fruit shed, and the 

 infested fruit at once placed in the storeroom for wormy fruits. Fruit 

 should be picked as soon as mature, because the longer it is left on 

 the trees, the more larvae escape in the orchard from the infested 

 fruit on the tree. 



Such a trap need not be necessarily limited to the fruit store- 

 room. Fruit growers having no storeroom available for infested 

 fruits, and who are accustomed to place the wormy fruit, to be cut 

 up for drying, in piles on the ground under branches of trees, may 

 use the trap to good advantage, providing a suitable wall, e.g. one 

 of brick covered with cement, two feet high, is erected, to enclose the 

 pile of fruit. The enclosure should have a cement floor, and be so 

 constructed that the floor can be washed occasionally. The trap 

 should be placed along the inner walls of the enclosure. 



The longer experience the writer has in dealing with the control 

 of codling-moth in large orchards in South Africa, the more convinced 



