PINK AND GREEN APHID OF POTATO. 21^ 



remain upon the potato vines and deposit overwintering eggs 

 there, the custom common through Aroostook County of burning 

 the old stalks is commendable in this connection. 



As the aphid feeds upon a wide range of plants, the fore- 

 going measures should be observed relative to other crops grown 

 in rotation on the same ground. 



Sprays. Cultivated roses should be sprayed with some good 

 tobacco decoction if found to be infested with these plantlice 

 in the spring. This is both for the health of the rose bushes as 

 a direct measure and for the potato crop indirectly, because 

 none of the aphids which are killed on the rose can migrate to 

 the potato fields later on. 



If the infestation upon the potato is excessive a tobacco spray 

 for aphids might be given. 



When the trouble is confined to greenhouse plants either 

 tobacco sprays or fumigation can be resorted to according to the 

 experience and preference of the operator. 



Formula — Tobacco Decoction. 



Tobacco stems or tobacco dust* 2 pounds. 



Water 4 gallons. 



Put the tobacco in the water, enough to cover, which may be 

 either cold or hot. Place over the fire and when the water has 

 reached the boiling point, remove some of the fire and allow 

 the water to simply simmer for fully one hour, when the liquid 

 is ready to be drained ofif, diluted to the above proportions and 

 appled. Boiling violently drives off the nicotine. If whole-leaf 

 tobacco is used prepare as above, using one pound of tobacco 

 to each four gallons of water. No lime or other alkaline sub- 

 stance should be added to the tobacco while cooking. Apply at 

 once or within a few days after making, if possible. 



Certain reliable extracts such as "Black Leaf," "Black Leaf 

 40," and "Nikoteen" can be secured through local druggists. 

 The Black Leaf preparations are manufactured by The Ken- 

 tucky Tobacco Product Company, Louisville, Ky., and are 

 carried by the Collins Hardware Company, 97 Friend St., Bos- 

 ton, Mass. Nikoteen is manufactured by The Nikotine Manu- 

 facturing Company, St. Louis, Mo., and can be secured from 

 Joseph Brick & Sons, 47-54 N. Market St., Boston, Mass. 



*Refuse from cigar faotories. 



