Spray Calendar. 61 



of potassium; pour the water over the cyanide, and then add the 

 sulphuric acid very slowly. Close the door and submit the trees 

 to the fumes for about 40 minutes. Open the door and allow the 

 gas to escape before attempting- to remove the trees, as it is poison- 

 ous to inhale. 



REMEDY FOR APHIS (LICE) ON CABBAGE, CAULIPLO^\^:R, TURNIPS, ETC. 



Ingredients— Quassia, chips, one pound. 

 Whale-oil soap, one pound. 

 Water, one gallon. 



Directions— Boil quassia chips for five hours, then add whale-oil 

 soap, while boiling; when dissolved, dilute to 10 gallons of water, 

 and spray warm. 



PEACH-ROOT BORER. 



The worst insect pest of the prune and peach trees in the Wil- 

 lamette Valley, and probably over the entire State, is the peach- ' 

 root borer. The moth lays its eggs at the base of the tree in the 

 months of May, June, July, and August. The eggs hatch in about 

 a week, and the worm at once begins to gnaw the bark and bore its 

 way down into the roots. It lives in the root for one year, and 

 comes forth a winged insect the succeeding spring and smnmer, and 

 lays the eggs for the next brood, as stated. The presence of the 

 worm is always betrayed by the copious exudation of gum, which is- 

 sues from he roots at the base of the trunk. 



Remedies— There are a large number of remedies for this pest 

 which are more or less successful, but where trees are cultivated on 

 a large scale many of the remedies become entirely too expensive. 

 A very popular and successful plan in the peach region of the East 

 is "mounding." Early in the spring, before the moth appears, the 

 earth is drawn about the base of the tree to the height of 12 inches, 

 and removed later in the season, about September 1st in this climate. 

 The use of washes intended to poison the worm have been much 

 used, the following formula being the most successful : 



Ingredients — Corrosive sublimate (poison), two ounces. 



Hard soap, five pounds to 10 gallons of water. 

 Alcohol, one pint. 

 Water, sufficient. 



Directions — Dissolve the sublimate in the spirits; stir it into the 



