38 a EXPERIMENT STATION. [Jan. 



other having a slight yellowish-brown tinge. Both mixed 

 easily with water, and showed little tendency to separate out 

 of the mixture on standing. The directions provided by the 

 manufacturers for mixing called for f to 1 per cent of the 

 material and § per cent of soap. The formula would therefore 

 be: — 



Aphicide, | to 1 part 



Soap, 5 part 



Water, 98^ to 98f parts 



Such accuracy as this proved unnecessary, and various 

 strengths of the material were tested, as the formula just given 

 was too weak to kill the aphids. At 5 and 6 per cent, both 

 grades of Aphicide proved very efficient, but were injurious to 

 tender foliage. An increase of the amount of soap was then 

 tried, and it was found that 1 per cent of soap with 4 per cent 

 of Aphicide gave very satisfactory results without injuring the 

 plants. 



The conclusions reached as a result of these tests are that 

 4 parts of Aphicide and 1 part of soap in 95 parts of water 

 make an effective material to use against aphids, and will not, 

 at least under ordinary conditions, injure foliage. 



Snlco r. B. — Tests of this material were undertaken at the 

 request of one of the county agricultural agents who was much 

 impressed by the comprehensiva claims made by its manufac- 

 turers, these being that it is an insecticide, a fungicide and 

 to some extent a repellent. 



The material is a thick, heavy, oily substance readily mis- 

 cible with water, from which it does not separate to any great 

 extent until after standing for about twenty-four hours. It is 

 claimed to be a mixture of a fish oil, sulfur and carbolic acid. 

 The directions for application supplied by the manufacturers 

 were to mix 1 part of the material with 25 parts of water for 

 use against aphids, 1 to 30 for mites on evergreens, 1 to 100^ 

 with 2 pounds of arsenate of lead powder, against cucumber 

 beetles, and 1 to 20 for ants in lawns. 



Tests were made with this material for the control of ants,, 

 of plant lice, and of mites on evergreens, as a repellent for 

 adult squash bugs, and to kill the eggs and young. Its ef- 

 fects on foliage, alone and with arsenate of lead, were also 

 tested. In these tests the directions for preparation were fol- 



