luS iiJfiPOUT OF THE iJoTAMST OF THE 



strip of three rows, one-fifth acre, was sprayed. The principal 

 object of this test was to determine whether a resin solution 

 could be used to advantage for making the Bordeaux mixture 

 adhere to the foliage of the asparagus and at the same time not 

 injure it. 



NOTES. 



The three rows were sprayed three times — August 5, 17, and 

 September 1, one barrel of the resin-Bordeaux mixture-^ being 

 u ed in each application. On September 9, a slight difference 

 between sprayed and unsprayed rows could be seen. The un- 

 sprayed portion was stripped of its foliage and all dead by Octo- 

 ber 7; the sjirayed rows held most of their foliage until killed by 

 frost. Plates XII and XIII, taken September 27, show only 



^"Kesin-Bordeaux mixture was prepared by first making tlie Bordeaux 

 luixlure in the nsnal way, tlie l-to-8 formula being used nnd tlie aniuunt. of 

 lime being determined by test; after Avliieh two gallons of stock solution 

 of resin was added to every 48 gallons of the Bordeaux mixture, the whole 

 bi'ing stirred. By testing it was found best to dilute the stock resin solu- 

 tiijn with 8 parts of water before adding it to the Bordeaux mixture, that 

 is, in preparing a .50-gallon barrel of mixture, the copper sulphate and 

 lime were diluted enough to make 40 gallons after which 2 g.illons of 

 stock resin solution was diluted to 10 gallons, then added to the Bordeaux 

 mixture. 



The formula for preparing a stock solution of resin has been given in 

 Bulletin 144 of this Station, but for convenience it is repeated here. The 

 proportions are as follows: 



Resin r> lbs. 



I'otash lye 1 lb. 



Fish oil 1 pt. 



Water 5 gals. 



In preparing large quantities of the rosin solution it was found iiii neces- 

 sary to follow all the preciutions given in Bulletin 144; also that it could 

 be prepared more rapidly by simply placing the oil ;nid resin in the kettle, 

 heating them until the resin was dissolved, then remove kettle from fire 

 and allow the mass to cool slightly after which the solution of lye is .'uld.d 

 slowly, the whole being stirred while adding the lye. After adding tlu! 

 lye the kettle should be again j)laced over the fire and the required amount 

 of water added. The wliole should be boiled until the solution will mix 

 with cold water, forming an amber-colored solution. Care should ahvaj's 

 be taken fo jjave the resin inid oil cool cufjutrh so that when the solution uf 

 lye or tlie water is adih li, liic w Imlc m.iss will iitjt l)iiil over and c.-ilcli lire. 



