Insects Injurious to the Apple. 163 



For this purpose paraffin emulsion does good, but tobacco wash is 

 most successful. The paraffin emulsion was found successful by two 

 .large Worcester growers, who made it as follows : soft soap 8 Ibs., 

 paraffin 4 gallons, water 100 gallons (8). 



But I have noticed that where this wash is used and trickles 

 down into the trusses that scorching often results, and as Mr. Clive 

 Murdock of Linton has pointed out to me, does as much harm 

 as the suckers. 



Some few years ago attention was drawn (7) to autumnal 

 spraying with paraffin emulsion to kill the winged adults before 



[F. V. Theobald. 



FIG. 136. APPLE TREE COATED WITH LIME AND SALT TO PREVENT APPLE SUCKER. 



they lay their eggs. The time to do this is directly the fruit is 

 picked, and the emulsion may then be used at double its normal 

 strength. 



The emulsion must be sent out in a dense spray and directed 

 not only over the leaves but also at the clouds of suckers that 

 fly under the trees. 



Mr. Smith of Loddington wrote me in 1905 that very few 

 would be hit, but from personal observations I found that the 

 majority can easily be killed. Mr. Oswald Ellis of Bramley tried 

 this treatment in badly infested plantations in the autumn of 1906, 



M 2 



