10 N. J. Agricultural Experiment Stations Circular 156 



The Right and Wrong Way to Apply Para-Dichlorobenzene 



Fig. 1. The soil about the peach tree made smooth and ready for treatment. 



Fig. 2. A correct treatment. One ounce of finely divided para-dichlorobenzene 

 placed on the soil about the tree in a continuous narrow band approximately 2 inches 

 from the tree. 



Fig. 3. Four to six shovelfuls of dirt free of grass, large stones, sticks, etc., 

 placed on top of the para-dichlorobenzene, 3 to 6 inches deep and packed down. 



Fig. 4. An incorrect treatment. The bulk of the gum should be removed before 

 the para-dichlorobenzene is placed about the tree. If larvae are located in the trunk 

 above soil level, place enough dirt about the tree and above the crystals to cover all 

 of the points where the gum is exuding or split the treatment, applying one-half of 

 the required amount of para-dichlorobenzene at soil level and the remaining one-half 

 on a layer of soil 2 to 5 inches above the first application. 



Fig. 5. An incorrect treatment. Crystals placed against the tree may cause 

 unnecessary and serious injury. All crystals should be about 2 inches from the tree. 

 Also note the large lumps present ; these are undesirable. 



Fig. 6. An incorrect treatment. In this figure the material is placed too far away 

 (6 inches) from the tree to be most effective as a killing agent for all of the borers. 

 This is particularly true when the soil is wet. 



