123 



Tomato In most cases injured moderately to se- 

 verely, both the leaves and fruit, by 

 both 1% and 2% applications. 



The apples used in these tests were Winesaps, in the nursery row. 



Larger trees in the University orchard at Olney were sprayed with 

 the regular orchard equipment in the summer of 1923 by the Horticul- 

 tural Department of the University of Illinois. On apples receiving 

 from one to three summer applications, very slight burning of the foliage 

 was seen in all blocks, but nothing serious. Dr. B. A. Porter, using 

 summer sprays on various varieties of apples at Vincennes, found injury 

 serious only on Grimes Golden. 



Scale Tests zv-ith Oil Emulsion, Summer of ip2j 



Three series of tests were made during the summer of 1923 with 

 2% strengths of (1) boiled-fish-oil-soap emulsion; (2) boiled fish-oil-soap 

 emulsion, with Bordeaux; and (3) cold-mixed Bordeaux-oil emulsion. 

 In these experiments, the leaves were all removed from the sprayed 

 branches so that every scale could be hit ; and reinfestation was pre- 

 vented, as far as possible, by bands of tanglefoot around the bases of 

 the branches. In the first two of these series, the percent of scale 

 found alive upon examination ranged from .2fc to 2.5%. In an ad- 

 joining orchard which was being sprayed with a 3% strength of oil emul- 

 sion during the time of one of the tests, 16.8% of the scale was found 

 alive, showing the effect of the foliage in preventing thorough applica- 

 tion, and indicating that under orchard conditions, summer applications 

 would not be very effective. The third series of tests gave 15% of the 

 San Jose scale alive, even where the foliage was removed so that every 

 scale was hit. 



Experiments in Ed Kelley Orchard, Anna, Illinois, 

 Winter of 1924-25 



During the winter of 1924-25, a series of tests was run with the 

 object of comparing the efficiency of light and heavy oils when used in 

 boiled and cold-mixed emulsions. All applications were made with the 

 hand sprayer, as previously described. The fall sprays were applied 

 December 1-9, and examined from six to eight weeks later for live 

 scale. The spring application was made February 7, and examined 

 six weeks later. Table XI gives the results of these sprays. 



