ENGLISH: ILLINOIS TREES: THEIR INSECT ENEMIES 



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careful work for complete plant coverage. The trombone-type 

 sprayer, shown in the frontispiece, develops adequate pressure 

 and is convenient for spraying a few shrubs and small trees. The 

 bucket-pump sprayer, fig. 56, also develops adequate pressure for 



Fig. 56. — Bucket-pump sprayer, an inexpensive but suitable sprayer for 

 shrubs and small trees. The spray material is mixed with water in a bucket 

 and kept mixed by agitation with a wooden paddle. 



