17 



A disagreeable feature of these washes is that they are very caustic, 

 and their application is often attended with considerable discomfort, 

 especially in windy weather. Some of the irritation to the face and 

 hands of the operator may be avoided by smearing- the former with 

 vaseline and covering the latter with rubber gloves. Leather is easily 

 corroded by these washes, and care should be taken that the spray does 

 not come in contact with the harness. Unless it is a still day, the horses 

 should be covered with blankets, or always kept to the windward. 



■ 



Other Insecticides Recommended for Destroying the San Jose Scale. 



With the spread of the scale, a large number of remedies of various 

 kinds have been placed on the market. Among the more important of 

 these are "Kil-o-scale," and "Anit-Scale," or "Scalecide," "Emulsified 

 Con-Sol" (also known as "Target Brand Scale Emulsion," "Con-Sol," 

 the "Webcide Solutions," "Zanoleum," and caustic soda and water. 

 From the results of experiments conducted in this Province and else- 

 where, it does not appear that these insecticides are any more effective, 

 if as much so, as the lime-sulphur washes in destroying scale. Prof. 

 C. O. Houghton states that* the so-called "soluble oils," "Kil-o Scale" 

 and "Emulsified Con-Sol," give satisfactory results when applied in 

 the spring. Fall applications of "Kil-o-Scale" were satisfactory in one 

 case, but not entirely so in another. "Scalecide" applied once as a fall 

 spray was quite unsatisfactory so far as could be determined after a 

 period of three months had elapsed. Applied to apple trees as a summer 

 spray, at the rate of i part to 28 parts of water, "Scalecide" gave valu- 

 able results. "Con-scale," the "Webcide Solutions" and caustic soda 

 in water failed to give satisfactory results in any instance." 



Crude Petroleum. 



This material was first recommended for use against scale enemies 

 by Dr. J. B. Smith, of the New Jersey Experiment Station. In the 

 hands of many orchardists, however, it has been found to be decidedly 

 damaging to many kinds of foliage, especially the more tender varieties, 

 the apple and pear being the only ones able to withstand its destructive 

 power to any successful degree. 



It is a very effective remedy, nevertheless, and whenever applied 

 destroys the scale; but because of its general destroying tendencies, it 

 cannot be recommended except for the most hardy trees. 



Kerosene Emulsions. 



The Kerosene Emulsions of various kinds have been recommended 

 for destroying many forms of insect life. The kerosene is, of course, the 



* Delaware Experiment Station Bull. No. 74, 1906, 

 2— Bull. 154 



