The Cojs'rKOL oi-' Couung-Motu in I^eaus ix Solth Afuica. l77 



records of oicliaid [)owei- dustiii<;- in tlie control of codling-iuotli in 

 pears. Since the records present results of work conducted only in one 

 season, the Elsenburo" lecords should answer nif)i'e decisively the 

 question of the etHciency of dustin<>- under varyinj^- climatic condi- 

 tions. Ackernian concludes that dusting- cannot be recommended as 



Fig. 1.— Power Dusting of Apples. fFroiii Cornell Bui. ."154.") 

 The same kind of duster was used in the Elsenburg orehard, 



Fig. 2. — Power Duster. 



an efficient method of controlling codling'-moth in pears in California. 

 Four and live dust applications failed to control codling in Williams 

 pears, whereas under similar conditions font licjuid sprays gave 

 satisfactory control. 



