290 Ageioultural Experiment Station, Ithaca, K. T 



the variety will be mentioned in the tables or text : apple; blackberry, 

 Agawam ; dewberry, Lucretia ; gooseberry, Industry ; raspberry, 

 Guthhert • and quince. At least one plant was used for each applica- 

 tion except in the case of the apple, when only one-half of each tree 

 was treated; the other half served as a check. 



Unless otherwise stated, the number of applications is six. These 

 were made on the following dates: May 31, June 14, June 29, July 18, 

 August 1, and August 22. Notes on the action of the materials applied 

 were taken July 14 and Sept. 12. This allowed the effects of few and 

 many applications to be compared. The condition of the weather 

 during this time is mentioned on page 268, and in addition it may be 

 said that the rainfall during August was about normal. 



The fungi against which the applications were particularly applied 

 were as follows : Daring the summer of 1892 most of the varieties of 

 apples had suffered from the attacks of the apple scab {Fusicladium 

 dendriticum) , for this fungus attacks the leaves as well as the fruit. 

 The quinces have also regularly shown the presence of leaf spot 

 {JSntornsoporium maculatum), while raspberries, blackberries and dew- 

 berries have been attacked by anthracnose. This year anthracnose 

 could scarcely be found except on the dewberries. The leaves and 

 canes of these plants were quite seriously attacked by this fungus 

 {Glceosporiuni necaior). The Industry gooseberry is an English 

 variety and is very susceptible to the attacks of mildew {Sphoerotheca 

 MorsavcB). It attacks both foliage and fruit, generally rendering the 

 latter unfit for market. 



The numbers in the first column of the following tables show approxi- 

 mately the degree to which the foliage was injured by fungi. All the 

 sprayed plants were carefully compared with the unsprayed and the 

 relative degree of injury from this cause noted as accurately as possible, 

 in order to determine the effect of the application. The second column 

 of the tables shows the gain in per cents of freedom from fungous 

 attack of the sprayed over the unsprayed portions. In the third 

 column are placed the numbers which show the per cent of injury 

 done by the applications. 



As a rule, the amounts of injury shown by the tables are based upon 

 the results of six applications. When they refer to a fewer number 

 the fact will be mentioned. 



iVb. 1. — Bordeaux mixlure. — This was jjrepared according to the 

 formula on page 268. Its value as a fungicide has been so often 

 proved that its use here is merely for the purpose of comparing the 

 results obtained from other applications with some which may be con- 



