466 



STATE BOARD OF AGRICULTURE. 



OTHER EXPERIMENTS WITH PEACHES. 



Experiment at South Haven. In 1920 at South Haven on the H. E. 

 Hawley farm an extensive peach dusting experiment was carried through in 

 an orchard which contained blocks of Gold Drop, Smock and Elberta. The 

 materials used were sulphur dust and dehydrated copper sulphate dust but 

 no conclusive results were obtained because there was no development of 

 any insect or fungus injury even on the check plots. There was no foliage 

 injury by either of the dusting materials. 



Experiments for the Control of the Peach Tree Borer 

 WiTPi Para-Dichlorobenzene. 



Para-dichlorobenzene has been used experimentally in several orchards 

 during 1920 and 1921. This is a material which has been used in an experi- 

 mental way for several years and more recently has been used in a practical 

 way by many growers in certain districts. It is obtainable in a crystalline 



Fig. 18. — Soil leveled and para-dichlorobenzene applied in a band about 1 14 inches wide and an equa' 

 distance |?oci trunk. SjnaJI can used for measuring material is shown at the right of tree. 



