Spray Calendar. 123 



cides. Aphis, Leaf -hopper. Kerosene emulsion, whale ,oil soap or 

 tobacco water applied to the insects' bodies at short intervals is 

 effective. Red Spider. Apply fine spray of water to the foliage; 

 keep house as damp as possible without injury to plants. 



Leaf-blight, Mildew. 1. ^Yhen growth begins in 

 Strawberry, spring, Bordeaux mixture ; 2, when first fruits are 



setting repeat 1 ; 3, after fruiting, or on non-bear- 

 ing plants, Bordeaux mixture at intervals of 1 to 3 weeks. See 



Bulletin 79. 



Leaf-blight. 1. As soon as disease is discovered, 



Tomato. Bordeaux mixture or a clear fungicide ; 2, 3, etc., 



repeat 1 at intervals of 7 to 10 days. Rot. Spray 



as directed under leaf-blight (unsatisfactory in most cases). Usually 



better to secure many pickings by starting the plants early and 



giving the best culture : then if the rot comes, some pickings stand 



a chance of escaping. Train the vines. 



FORMULAS. 



Paris Green. 



Paris green 1 pound 



Water 100-300 gallons 



If this mixture is to be used upon fruit trees, 1 pound of quick 

 lime should be added. Repeated applications will injure most 

 foliage, unless the lime is used. Paris green and Bordeaux mix- 

 ture can he applied together loith perfect safety. Use at the rate 

 of 4 to 8 ounces of the arsenite to 50 gallons of the mixture. The 

 action of neither is weakened, and the Paris green loses its caustic 

 properties. For insects that chew. 



London Purple. 



This is used in the same proportion as Paris green, but as it is 

 more caustic it should be applied with two or three times its weight 

 of lime, or with the Bordeaux mixture. The composition of Lon- 

 don purple is variable, and unless good reasons exist for supposing 

 that it contains as much arsenic as Paris green, use the latter poison. 

 Do not use London purple on peach or plum trees unless consider- 

 able lime is added. For insects that chew. 



