Whatever the style of barrier used, it is alwnys best where the 

 insects are very numerous, to destroy the eggs deposited below the 

 bands. This is not a necessity but it is a wise precaution, for often 

 the bands may not be absolutely " worm-proof." Perhyps the surest 

 way to destroy the eggs is to carefully scrape the bark and burn the 

 scrapings, but an application of kerosene is effective though apt to 

 injure young trees. The time to destroy the eggs is just before they 

 are expected to hatch, in this State during the first week of May. 



Time to Apply Bands. — If it is known positively Ihat only the 

 Spring Canker Worm is to be contended with, the bands need be kept 

 moistened through March, April and May only, but if the Fall Can- 

 ker Worm is the pest, the bands should also be kept moistened 

 throughout October and November. If there is doubt tis to which 

 species it is, it is best to have the bands in readiness in tiie fall on 

 all the trees, but to apply the ink on a few only. A close watch 

 should be kept on this few and if any moths are found caught, the 

 bands on all the trees should be immediately inked. 



Arsenical Sprays. — Showering with arsenical sprays is the most 

 effectual method of destroying the caterpillars on trees which have 

 not been protected by bands, and on those on which, through lack of 

 proper care, the bands have proved ineffectual. 



For this purpose Paris green, London purple, or arsenate of lead 

 may be used. One pound of Paris green to 150-200 gallons of 

 water is a safe proportion if the liquid is kept well agitated to keep 

 the poison in suspension. London purple is a less powerful poison 

 than Paris green and more liable to injure the foliage, but it has the 

 advantage of being cheaper. It should not be applied stronger than 

 one pound to 150 gallons of water. With arsenate of lead properly 

 prepared there is absolutely no danger of injuring the foliage, no 

 matter how strong the mixture. Arsenate of lead can be prepared 

 by bringing together eleven ounces of acetate of lead and four 

 ounces of arsenate of soda in water. These substances dissolve and 

 unite with each other to form arsenate of lead, a fine, white powder 

 which remains in suspension much longer than Paris green. If the 

 materials are lumpy they should be crushed to a powdered condition 

 before being put in the water. Hot water should be used to dissolve 

 them. Two pounds of arsenate of lead to 150 gallons of water is a 

 good proportion to use. 



All arsenical poisons should be applied in the form of a very fine 

 spray. They will remain on the foliage much longer if two quarts 



