24 INJURIOUS INSECTS OF 1903. 



The writer is happy to say that a very general plowing- of 

 large tracts of land in the vicinity of Lindsay P. O. has been 

 accomplished since the above bill became a law. This plow- 

 ing was done voluntarily on the part of the various ov/ners. 

 To the plowing we believe the general immunity from this 

 pest this season in a district previously badly infested is 

 largely due. An assistant visiting this locality in August 

 heard that they had been numerous on a few farms earlier in 

 the season, and in each case the outbreak could be traced to 

 failure to plow, the law not being elTective in time to be used. 

 We have every reason to believe that if fall plowing is perse- 

 \'ered in in that section the grasshopper pest which has proven 

 so serious hitherto will be practically stamped out. 



Canadian authorities have made use of a cheap mixture 

 apparently first introduced by Norman Criddle and called "The 

 Criddle Mixture." This department was so much impressed 

 w'ith the unqualified praise which this poison received from all 

 in Canada who used it that on May 12, 1903, Press Bulletin No. 

 16 was issued on this subject. The text of the Bulletin is here 

 given : 



THE CRIDDLE MIXTURE. 



The difference between this poisoned bait and others consists in the 

 substitution of horse manure for the bran so commonly used hitlicrto. 

 on the ground that it costs nothing, is generally handy on a farm and 

 is quite as effective as bran, if not more so. 



At a meeting of entomologists at Washington, D. C, the past win- 

 ter. Dr. Fletcher, the Government Entomologist of Canada, gave 

 unstinted praise to the use of this compound, and. both at that meeting 

 and in a printed report upon the subject, cited many instances of great 

 success following its application. (See Report of Experimental Farms 

 for 1901. page 226.) "It has entirely replaced the cumbersome and 

 inadequate hopper-dozer," said Mr. Fletcher. 



COMPOSITION OF CRIDDLE MIXTURE. 



One part Paris Green, two parts salt, 40 parts horse manure, by 

 measure. Add enough water to make soft without being sloppy. Scat- 

 ter it about the fields well, in quantity according to number of grass- 

 hoppers. They will be attracted for 40 feet. It is most effective when 

 fresh, but will do excellent work when several weeks old, even after 

 being washed by rain. 



