434 EXPERIMENT STATION RECORD. 



" (7) The cost of treating nursery stock witli ]?ordeaux mixture, the only prepa- 

 ration tliat can be uiiqualiticilly reconiiueuded, need not exceed 25 cts. per 1,000 

 trees the first season. The second year the cost of the work will also be 25 cts., 

 while the third year tlie cost will be increa.sed to 35 or 40 cts. per 1,000, making 

 the total cost of treating trees until the buds are 2 years old from So cts. to $1 per 

 1,000. 



"(8) The net prolit resulting from the W(»rk in case of the pears and cherries 

 ranged from $1 to $40 per 1,000 trees, the average being $13 per 1,000. 



"(9) In conclusion it may be said that as a whole the experiments clearly show 

 that spraying nursery stock with fungicides is thoroughly practicable ; that it results 

 in better trees in every way; and finally, that it yields a handsome profit."' 



The growth of pear seedlings as affected by one season's spraying 

 with Bordeaux mixture was investigated. One hundred Japanese and 

 the same number of French seedlings were taken as nearly uniform as 

 possible. Bordeaux mixture was applied 5 times, the formula for the 

 fungicide being, copper sulphate G lbs., lime 4 lbs., water 45 gal. 



liecords of weight, height, and size of seedlings were taken and com- 

 pared with the same factors at the end of the experiments. In conclu- 

 sion, it is shown that: 



*'(1) Five applications of Bordeaux mixture had a decided effect on tlie growth 

 of both Japanese and French pear seedlings, increasing their weight, height, and 

 caliper to a marked extent in almost every case. 



"(2) The Japanese seedling.3 in all cases proved more vigorous than the French, 

 but whethi'r tills wouldhold true in all sections of the country remains to bepi'oved." 



Spraying experiments, J. Craig {Canada Exptl. Farms Bpf. 1893, 

 pp. 100, 101). — A report is given on the use of Bordeaux mixture and 

 ammoniacal copper carbonate as a protection against codling moth 

 and apple spot. The season was not a favorable one for the pests and 

 the results are rather inconclusive. Bordeaux mixture and Paris 

 green were employed, and it is claimed that tlie poisonous action of 

 the arsenite is diminished by adding it to the fungicide when used on 

 the api'le, pear, and plum trees. When used as preventives against 

 the currant worm and gooseberry mildew the combination proved very 

 effective. 



Effect of dilute sulphuric acid on foliage, d. Craig {Canada 

 Exptl. Farms Upt. l.s!j:j^ pp. inj^ li)2). — A report is given on the use of 

 dilute sulphuric acid as a fungicide. Single applications of ^, h, 1, and 

 \h per cent solutions were made. All strengths injured the foliage of 

 apple, grapes, and plums in the orchard. In the greenhouse, rose 

 leaves (young and mature), strawberry, geranium, and hibiscus were 

 sprayed. The ^ and h per cent solutions did no injury except to the 

 matnre rose foliage and hibiscus. Strengths of h per cent and more 

 injured the strawberry leaves, and only the young rose leaves with- 

 stood considerable injury for all strengths. The injury seems to be 

 caused by the evaporation of the water used to dilute the solution, 

 leaving it too strong. Wlien applied to roses as strong as li per cent 

 solution it apparently had no effect on the aj^hides which infested 

 them. 



