REPORT OF STATE BOARD OF HORTICULTURE. 137 



SPRAY XO. 4. 



RESIN WASH. 

 By Professor Koebelk. 



This is a summer spray for all scale insects, woolly and 

 green aphis. 



HOW PREPARED. 



Ingredients — Resin, four pounds. 



Sal Soda, three pounds. 



Directions — Place resin and sal soda in kettle with three 

 pints of cold water. Use soft or rain water always. Boil or 

 simmer slowly until thoroughly dissolved, when it will look 

 black. The sal soda will adhere to the sides of the kettle, 

 and must be scraped down. When it looks dissolved, if 

 there are pieces of resin in the bottom of the kettle it needs 

 more boiling. When sufficiently boiled, add enough hot 

 water to make fiftv gallons. After adding the water it will 

 become thick, but after boiling again it becomes thin. The 

 above is ready for immediate use, and should be applied cold 

 or only lukewarm. If desired for future use, boil the above 

 amount of ingredients as directed, and add water to make 

 five gallons ; boil until thick . This will stand any length of 

 time, and is always ready for use. Wlien required, use one 

 part or gallon of compound with the following number of 

 gallons of boiling water, and stir thoroughly when applying : 

 For hop louse, one gallon of compound to nine gallons of 

 water ; for woolly aphis, one gallon of compound to seven 

 gallons of water ; for San Jose scale, one gallon of compound 

 to six gallons of water. The foregoing spray is not injurious 

 to the tree, for after three or four days of sunshine it dissolves 

 and leaves the pores of the bark open. 



SPRAY XO. 7. 



BORDEAUX MIXTURE. 



Used for apple scab, pear scab, leaf blight, apple canker 

 or deadspot, curl-leaf on tlie peach, crater blight on the pear, 

 gummosis, prune or plum rot, and black rot on the grape. 



This is the sovereign remedy against injurious fungous 

 diseases, and its use is general throughout the world ; there- 

 fore the combination of bluestone and lime, known as bor- 

 deaux mixture, is indispensible in fruitgrowing. 



