EXPERIMENT STATION BULLETINS. 673 



KEPORT OF THE SOUTH HAVEN EXPERIMENT STATION. 



Professor H. J. Eustace, Horticulturist: 



I submit this report of the South Haven Sub-station for the year end- 

 ing June 30, 1917. 



During the past season, this Station has been mainly concerned with 

 plant breeding and exijerimental spraying. 



SPRAYING. 



Scale Spraying, 



Materials Used. Quantity Used. 



Scalecide " 1 gallon to 15 gallons water. 



Concentrated Lime-sulphur 1 gallon to 8 gallons water. 



Soluble sulphur 1 pound to 4 gallons water. 



Sherwin-Williams Dry Lime-sulphur ... 1 pound to 4 gallons of water. 

 Sherwin-Williams Dry Lime-sulphur ... 1 pound to 3i/^ gallons of water. 



Applications were made on April 2G, 27 and 28, on trees which the 

 past season had shown some indications of scale. All of the trees that 

 were sprayed, however, were only slightly affected with scale. 



There was much variation in the results due to a lack of uniform 

 conditions under which the applications were made. It was, therefore, 

 impossible to arrive at any definite conclusions as to the effectiveness of 

 the various mixtures. 



Control of Plant Lice on Apples. 



Applications were made on young trees of Wagner, Wealthy and 

 Oldenburg, which seemed to be infested with plant lice to about the same 

 degree. They were quite numerous at the time of the first spraying but 

 at the time of the second application, not enough could be found to make 

 a count and were not present in large enough quantities after this to 

 make it an object to do further work. 



Materials Used. 



Nicotine sulphate, 40%, one ounce to eight and a quarter gallons, 

 combined with lime-sulphur, and scalecide, one gallon to thirty gallons. 



Dates of Aj) plications. 



First application on April 24th. Fruit buds were swelling and leaf 

 buds just showing green. The plant lice collected mostly on the swelling 

 buds and in moderate quantities. 



Second application on May 20th. Fruit buds were showing pink and 

 the lice were not so prevalent and more scattering, occurring mostly 

 around the flower buds. 



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