<>7 



fruit of those most heavily incrusted. The wash had apparently 

 taken effect only on the crawling young-, tog-ether with a small per- 

 ccntag-e of those most recently fixed. The older insects seemed to 

 have been uninjured, and reproduction had g-one on unchecked, the 

 young- scales establishing- themselves upon the tree without seem- 

 ing- hindrance from the treatment g^iven. 



Four trees, two apple and two peach, sprayed at the same time 

 with a ten per cent, kerosene and soap emulsion, were found July 

 12 in practically the same condition as those treated with the 

 caustic wash, except that fewer of the scales had been killed. 



It appears from this experiment that these summer washes, 

 thoroug-hly applied, will destroy only the young- scales, and will 

 thus serve at best as a slig-ht and temporary check upon the in- 

 crease and spread of the pest. No injurious effect was shown on 

 any of the trees with the exception of a slig-ht burning- of a few of 

 the leaves by the Ivos Ang-eles wash-just enoug-h to show that it 

 could not have Ijeen safely used in any g-rcater streng-th. 



