35 



to the ground by means of a silken thread. This may be on account 

 of the fact that the hiryiu sometimes drop accidental!}^ and use the 

 silken thread to support themselves. It is not uncommon to find these 

 threads extending through the branches of trees which are badl}^ 

 infested with the codling moth. 



Professor Gillette finds that 85 per cent of the laryte enter the bands 

 during the night, and the remaining 1,5 per cent during the da}'', in 

 August. Observations of the writer show that in the summer the 

 larger percentage enter the bands from 6 p. m. to aljout 11 p. m., at 

 Boise, Idaho. After 11 p. m. it is usually so cool that there is but 

 little activity. In September the conditions as given by Gillette are 

 about reversed. The nights are cold, and the larvte are actiA^e only 

 during the warmer Darts of the day, at which times they enter the 

 bands. 



If the apple has fallen to tne ground the larva simply crawls into a 

 convenient place and spins its cocoon. After leaving the friut the 

 larva is unprotected, and does not consume nmch time in finding a 

 place to start its cocoon. 



PLACES OF SPINNING COCOONS. 



In orchards the cocoons are normal!}' found in cracks or holes in 

 branches or trunks of tlie trees, under scales of rougli bark, and in 

 the rough ])ark on the main branches of the trees. When the trunk 

 of a tree is smooth tlie cocoons are often found under bits of l)ark 

 and in the earth about the foot of the trees. Cocoons are found under 

 anything on tlie tree or leaning against it, as bands placed around the 

 trunk, rags tied around the limbs, or boards and sticks leaning against 

 the tree. When nmch fruit h s fallen the larvie seem to have a greater 

 range in spinning cocoons, often placing them among clods of earth, 

 beneath paper or any other rubbish on the ground, in the cracks and 

 rough bark of adjacent trees, in piles of wood or lumber, in fence 

 posts, and under the pickets of fences. In piles of fruit in the orchards 

 the cocoons arc normally found placed among the apples; in orchards 

 where the trunks and branches of the trees are smooth, the cocoons 

 are often found in the cracks of the earth about the foot of the trees, 

 and when fruit is lying on the ground they have been found among 

 the clods of earth })y Cordley and McPherson. Cordley pulilished a 

 photograph showing a cocoon on a clod of earth. In the writer's 

 experience two cases have been found in which a cocoon was spun 

 inside of wormy fruit. It was impossible to tell whether or not the 

 larva? which had spun these cocoons were those which had done the 

 injury to the fruit. In packing houses it is quite common to find the 

 larvjB m cracks of the floor, walls, and roof, in piles of lumber or 

 boxes, and in the angles and cracks of boxes or barrels used for han- 

 dling the fruit. The larva usually gnaws out a cavity in which to 



