1905 ENTOMOLOGICAL SOCIETY. 31 



After examination of tlie trees we concluded that the last wash gave the best 

 results, although scale was plentiful on all his trees in October, at the time of 

 our visit. 



As part of the experimental work for 1905, in addition to the lime-sul- 

 phur washes, Mr, P. W. Hodgetts and myself tried some new mixtures 

 which had been advocated, viz., Carlson's Mixture, and Pratt's Scalecide. 



In the peach orchard of the Industrial Home near St. Catharines, Carl- 

 son's Mixture, kerosene-flour, and uncooked lime-sulphur were used. The 

 first two did not give satisfactory results, for scales were very abundant on 

 trees treated by these mixtures; the last, viz., the uncooked lime-sulphur, in 

 our opinion, did its work well, for scales were very scarce on trees treated 

 by it. Here again, the wash was quite evident on the bark to the end of the 

 season. The condition of these trees is remarkable when we bear in mind 

 that across the fence is an untreated peach orchard which is terribly encrust- 

 ed and rapidly dying. Th^ few trees left untreated as checks are now very 

 badly encrusted. 



As I have already stated neither Scalecide nor Carlson's Mixture gave 

 as good results in Mr. Beattie's orchard as the uncooked lime-sulphur. It 

 appeared to us that in this orchard Carlson gave better results than Scalecide. 



Carlson's Mixture and the kerosene-flour emulsion were also tried in a 

 peach orchard belonging to Jas. Hutchison, near Yirgil, the bulk of the 

 orchard, however, remaining untreated. Results were far from satisfactory 

 with both mixtures, the treated trees showing serious incrustation, although 

 not quite as bad as those left untreated. This orchard furnishes an instance 

 of the awiul multiplication of scale in a single season. When the trees 

 were sprayed on April 19th, a record was made in our note books to the effect 

 that the orchard was comparatively free from scale, yet on October 24th, 

 when we examined the orchard, the trees were very badly encrusted. 



Scalecide and Carlson's Mixture were applied to some Japan plum 

 trees belonging to Mr. Porter Adams, Queenston. Results were not satis- 

 factory, as the trees are now badly infested. 



A few Bartlett pear trees in Mr. Hodgett's garden, St. Catharines, were 

 sprayed with the summer strength of Scalecide, but the results showed it 

 powerless to control the scale. 



Mr. Henry Kottmeier used Carlson's mixture on his plum orchard, but 

 the results here too were far from satisfactory, and the majority of the trees 

 are now badly infested. 



In a small orchard near Mr. Kottmeier's, Carlson's Summer Mixture 

 was applied, but it was not able to any extent to prevent the scale from multi- 

 plying. The treated trees are now badly infested. 



Other examples of treated orchards might be stated, but enough has been 

 given to show the values of the different mixtures as scale destroyers. None 

 of the new mixtures, such as Carlson's, Pratt's Scalecide, or the kerosene- 

 flour emulsion, can be recommended to the fruit-growers as effective remedies 

 for the San Jose Scale. The lime-sulphur washes gave better results in every 

 case that came under our observation. 



We are not in a position to decide definitely whether the uncooked lime- 

 sulphur wash or the cooked wash is the better remedy. To us it would appear 

 that the personality of the man who makes and applies the wash counts^ in 

 most cases for success or failure. Careful preparation of the wash according 

 to formula, the use of good rapid-slaking stone lime, and thorough application 

 to the trees will in nine cases out of ten check the scale completely. More- 

 over, we are of the opinion that the addition of salt to the wash would 

 increase its adhesive qualities, and add to its effectiveness. 



