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FO.OT> PLA^^TS, 



The list of food plants of the San Jose scale insect, so far as 

 known, are as follows : apple, pear, peach, plum, cherry, ai)ricot, 

 quince, flowering quince, almond, spirase, raspberry, rose, hawthorn, 

 cotoneaster, gooseberry, currant, flowering currant, persimmon, elm, 

 osage orange, linden, euonymus, acacia, English walnut, pecan nut, 

 alder, weeping willow and laurel-leaf willow. 



METHODS OF DISTRIBUTION. 



As the mature female is wingless, and fixed to the tree on which 

 she feeds, she will not be likely to cause other regions to become 

 infested unless the tree to which she is attached is removed. Her 

 progeny, however, when they are moving about freely, may be trans- 

 ported to places more or less distant by other insects, birds, larger 

 animals or even by man ; but the chances are not favorable for any 

 very wide dispersion in this way. The}' infiy? however, be carried 

 from one tree to another at no great distance. Infested fruit may 

 be transported from one part of the country to another, and by 

 chance be left in some place where it is possible for the young to 

 crawl to some suitable food plant ; but by far the most favorable 

 metliod for the wide distribution of this insect is on nursery stock, 

 and to this the most careful attention should be given. 



It will be decidedly to the advantage of every dealer in nursery 

 stock to take measures to clean his trees from this scale and to keep 

 them free, for, if this be not attended to, purchasers will find other 

 and more satisfactory parties to deal with. 



REMEDIES. 



If only a comparatively few small trees are infested in a nursery 

 or orchard, the best way is to burn them, taking great care that in 

 doing so none are scattered. There is no method of destroying 

 insects equal to cremation. 



Professor Howard, after having a long series of experiments per- 

 formed for the purpose of ascertaining the best and most economical 

 method of destroying this insect, says : "The only perfect results 

 that have been reached have come from the application of two pounds 

 or more of commercial fish-oil or whale-oil soap to a gallon of water 

 soon after the leaves fall in the autumn, and from the application of 



