Page:The Zoologist, 4th series, vol 1 (1897).djvu/541



MANUAL of REMEDIES and MEANS of PREVENTION for the ATTACKS of INSECTS on FOOD CROPS, FOREST TREES, and FRUIT. One vol., fully illustrated, with portrait. Demy 8vo, cloth, 5s.

.—The main points of prevention are—1stly, all such measures as will prevent the caterpillars going up the stems of the trees to establish themselves under the rough bark, for their change to chrysalis state; 2ndly, such treatment of the bark as would prevent this furnishing the caterpillars with suitable lodgings for the change; and 3rdly, the use of such washes or dressings as would destroy any chance caterpillars which escaped the preventive measures. To the above should also be added disinfecting baskets or packages which may convey infestation in caterpillar or chrysalis state to Apple grounds or stores.

"Scraping the trees.—All Apple, Pear, and Quince trees in an infested orchard should be scraped, and all loose bark removed.

"Spread any old sacks, or other suitable material round the tree as far as any scrapings are likely to fall. Commence on the tree as far as there is any loose bark and scrape it carefully off. Examine and scrape all crevices in the bark, or those formed in the forks of the tree. Continue scraping until the ground is reached. Next gather