it is often necessary to treat different diseases in different ways, 

 yet a few general suggestions can be given that may be profi- 

 tably followed in most cases. 



No straw or trash from infested grain should be allowed GO 

 accumulate or remain upon the ground, especially if the same 

 crop must be planted the next year. All the refuse should be 

 burned. Straw and stubble, from wheat affected with rust 

 should be burned. Rotation of crops should be practiced as 

 much as possible. Potatoes or beets should never be planted in 

 ground where "scabby" potatoes have been raised the preceding 

 year. 



For the deseases caused by "blights," "mildews," or the "leaf 

 spot" fungi such remedies as the Bordeaux mixture may be used 

 with reasonable assurance of success. 



This mixture is made of lime, copper sulphate, and water, 

 mixed in the following proportions. 



Lime, 4 Ibs. 



Copper Sulphate, 6 Ibs. 



Water, 22 gallons. 



The usual way is to slack the four pounds of lime in six gal- 

 lons of water; then disolve the six pounds of copper sulphate in 

 sixteen gallons of water; as soon as they are cool mix all to- 

 gether well. As the lime is only held in suspension it is nec- 

 essary to keep the mixture well shaken while applying it to the 

 plants. It may be applied by means of a spraying pump. The 

 time for spraying depends a great deal upon the season. As a 

 rule the spraying should begin about the last of May or the 

 first of June; this being about the time that the fungi are be- 

 ginning their growth. The mixture falls upon the leaves and 

 prevents the germination of the fungus spores arid kills the 

 young fingi where they have not yet penetrated into the host. 



It has been found that a more dilute solution of the Bordeaux 

 mixture is quite effective with such diseases as "leaf spot," 

 "scab," &c. Mixing together 4 Ibs. lime, and 4 Ibs- of copper 

 sulphate to 50 gallons of water, this is much less expensive than 

 the first and more easily applied. 



As yet no fungicide has been found that will successfully pre- 

 vent rust, 



