47 



always safe in careful hands; but it will not do to intrust it to an 

 ordinal}- laborer. 



The lime, salt and sulphur wash has also been referred to in con- 

 nection with the San Jose scale; but this is not advised for garden 

 use and is not needed for use on shade trees. If there are trees 

 infested by the San Jos6 scale in such numbers as to require a large 

 quantity of material, this wash may be needed, and in that case full 

 directions for making and applying will be found in Bulletins 169 

 and 178 of the Station; either of which may still be had. 



INSECTICIDE MACHINERY. 



At present it is possible to buy machinery to spray a single bush 

 or the tallest tree. There are bucket pumps, syringes, atomizers and 

 anything from these to power sprayers, giving pressure to any desired 

 extent. In the garden, a compressed air sprayer is on the whole tlie 

 most convenient Such sprayers, holding from one to five gallons 

 of liquid and working by means of a pump that compresses the air 

 above the material to be sprayed, are very practical and will serve to 

 deal with all ordinary garden plants, shrubs or even small trees. A 

 five-gallon Leggett sprayer has served for the experiments in my own 

 garden, and other advertised machines of the same capacity are as 

 good. The nozzles attached to such outfits usually leave much to be 

 desired, and in general it will pay to take off those that are fm-nished 

 and substitute a Vermorel, that ■nail give a fine and abundant spray. 

 Where roses, small fruits and other low plants only are to be dealt 

 with, an even simpler outfit will answer. Atomizers are now made 

 with cans holding one to two piats of mixture and making an ex- 

 tremely fine spray in practical use. In ma,ny gardens that will be all 

 that is needed and the cost amounts to only a dollar or two. It will 

 pay to .buy one made of brass and of good quality throughout. Where 

 a bucket pump or anything above it is used, the Termorel nozzle 

 should be made a part of the outfit, and, in general, it may be said 

 that it does not matter so much what the pump is, provided it gives 

 a reasonably constant pressure — if the nozzle makes a fine spray with 

 force enough to penetrate through the covering of protected insects 

 or the pubescence on the surface of some leaves. A sprinkling pot 

 is the poorest tiling that can be used, because the particles from the 

 rose are so coarse that they will either roll off without wetting leaf or 



