Plants as Affected by Animal Parasites. 169 



skin kills the newly-hatched insect as it eats its way 

 inward. 



A band of cloth or paper, placed about the trunk of 

 fruiting apple or pear trees forms a convenient retreat 

 for larvae of the codling- moth, in which to pupate. They 

 may then be readily destroyed by removing the band. 

 The bands should be a few inches wide, and should be 

 put on before midsummer. They should be taken off 

 once in ten to fourteen days, until the fruit is harvested, 

 and all cocoons beneath them should be crushed. 



314. The Plum Curculio (306) that so often stings young 

 plums, causing them to drop before maturity, is controlled 

 by jarring the beetles, that deposit their eggs in the 

 young fruit, upon sheet- covered frames on cool, still 

 mornings while their muscles are stiff (Fig. 76). The 

 jarring should begin almost as soon as the petals (143) 

 fall, and should be repeated every still morning as long 

 as any beetles are found. The work must be done in 

 the early morning. Any light wood frame, covered with 

 cloth may be used as a substitute for the more convenient 

 device shown in the figure. Where the substitute is 



used, the beetles 

 must be looked for 

 on the sheet and 

 destroyed as found. 



315. The Prompt De- 

 struction of Infested 



FIG. 76. Curculio catcher. It is wheeled be- fruits materially aids 

 neath the branches of the tree, and the latter . . J 

 are struck with a light, cloth-covered mallet, in keeping the fruit- 

 which jars the beetles upon the sheet-covered blirrowin * insects in 

 frame, from which they roll into the box be- 

 neath. For small trees, the trunk slips in Subjection. H O g S 

 through the slot at the left. and s h eep ill the Or- 

 11 



