40 



For all these spider sand mites, the remedy is sulphur. It can 

 be used dry in which case it should be as fine and pure as pos- 

 sible, and applied in the early morning, preferably by blowing it 

 into the foliage as thoroughly as possible while the leaves are damp 

 so it will stick to them. It is also much more effective in warm 

 weather, as it is the fumes liberated by the heat that do the work. 

 It is often mixed with half as much lime, air-slacked, to make it 

 adhere better to the leaves. 



The liquid lime sulphur sprays are also very efficient, and warm 

 weather is not so necessary to their success. 



