l^EW YoEK Agricultural Experiment Station. 311 



one-fourth grown and of but little avail if the application is de- 

 layed until after they are half grown. 



Second, destroying the caterpillars when they have assemhled 

 upon the trunks or large branches. — This may be done in any con- 

 venient way. A very easy way is to crush them with an old broom 

 which, to insure the death of all the caterpillars it touches, has 

 been dipped in kerosene oil. The kerosene oil is fatal to them, 

 and if preferred may be sprayed directly upon them. 



Third, jarring and banding. — Jarring is seldom practical ex- 

 cept with small trees. The tree should be given a few quick, sharp 

 raps with a padded mallet. The cateriDillars will drop at once 

 and may be collected and destroyed in curculio carts or upon 

 sheets spread upon the ground. 



Banding is for the purpose of preventing those caterpillars that 

 have been jarred off by the wind, or by birds, or have left the tree 

 during the restless period just previous to pupating, from again 

 ascending the trunk; also to protect the trees from invading 

 caterpillars, especially when the orchard is situated near infested 

 shade or forest trees. The bands may be made of cotton wool in 

 which the caterpillars will become entangled, or better by some 

 sticky substance such as tar mixed with two parts of raw oil, or 

 with raupenleim. Either of these substances should be smeared 

 upon bands of paper at least a foot wide which can be tied around 

 the trunks of the trees. By using the paper there is no danger of 

 injury to the bark. Sticky fly paper is sometimes successfully 

 used in the same way. The caterpillars will be caught upon 

 these bands and soon die. Where the caterpillars are very 

 abundant so many will be caught upon the bands that other cater- 

 pillars can crawl safely over them. In such an event new bands 

 will have to be applied or the originals made wider. Of these 

 sticky substances raupenleim is one of the best. It can be obtained 

 of William Meuzel & Co., 64 Broad St., 'New York, and the Bow- 

 kcr Fertilizer Co., Boston. It should never be applied directly 

 to the bark. 



