INJURIOUS INSECTS OF 1904. 



115 



very much reduced, if not made to disappear altogether. Even one 

 of the above remedial measures, if followed faithfully and intelligently, 

 will cause a marked improvement. 



*NoTE. — Dissolve 11 ounces acetate of lead (sugar of lead) in 4 quarts 

 of water, in a wooden pail, and 4 ounces arsenate of soda (50 per cent purity) 

 in another wooden pail. The sugar of lead can be dissolved more quickly by 

 using warm water. Pour these solutions into 150 gallons of water. Arsenate 

 of lead can be purchased already prepared. 



It is important to note in this connection that if one is using Bordeaux 

 for early spraying for scab or other fungus diseases, adding an arsenical poison 

 (Paris green, for example) to the Bordeaux will serve good purpose against 

 the Plum Curculio, and other leaf and fruit eaters. 



THE MOTTLED WILLOW BORER, AN INTRODUCED 

 ENEMY TO CAROLINA POPLAR AND WILLOWS. 



While this tree is not, from an aesthetic standpoint, as desirable as 

 many others, it is becoming very popular as an addition to our list of 

 trees for windbreaks on account of its extremely rapid and vigorous 

 growth. 



Fig. 



-The Mottled Willow Borer, Cryptorhynchus lapathi, Linn., somewhat enlarged. 

 Orisinal. 



It will interest the citizens of this state, therefore, to know that 

 not only is this tree, but practically all the willows and probably most 

 of the poplars, alders and birches threatened with a borer, which 

 came from Europe several years ago, and though confined to the 

 East for a long period, has worked its way, evidently through ship- 

 ments of nursery stock, into Ohio, probably into Canada, and this 



