982 ReporT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
I. SPRAYING EXPERIMENTS WITH THE LIME- 
SULPHUR-SALT WASH. 
HISTORY AND PRESENT STATUS OF THE WASH IN THE EAST. 
The origin of the lime-sulphur-salt wash seems to be in doubt. 
A wash containing these ingredients is said to have been used 
in California as a sheep dip long before a use was found for it 
in the orchard. When a need for a safe remedy for scale insects 
was felt on the Pacific Coast it was one of the first washes to be 
tested. It was considered satisfactory and is now said to be the 
principal wash used as a remedy for the San José scale in 
California. 
The wash was first tested in the Kast by Marlatt and Coquillett? 
in 1895 with such unfavorable results that no further attempts 
were made to use it in eastern orchards until Marlatt? again 
tested it at Washington in 1900 with much better success. The 
explanation given is that about three weeks of unusually dry 
weather immediately following the treatment prevented the 
washing off of the compound before the scales had been killed; 
and it-was suggested that if the treatment was followed by twe 
or three weeks of comparatively dry weather it would probably 
prove a satisfactory remedy. More recent results are those ob- 
tained by Smith of New Jersey, Forbes of Illinois and Scott of 
Georgia, all of which are, in the main, favorable to the lime 
sulphur-salt wash, and have resulted in showing that its adhesive 
qualities are better than was at first supposed. 
While the more recent experiments are promising they have 
not yet been sufficiently extensive to determine the real status 
of the wash as a remedy for the scale under eastern conditions. 
There is need, therefore, for further experiment on as large @ 
scale as is consistent with thorough work. 
LOCATION, PLAN AND OBJECTS OF THE EXPERIMENTS. 
The orchards in which these experiments were conducted are 
situated on Long Island near Riverhead, in the upper Hudson 
Valley near Kinderhook, Columbia County, and in western New 

10.8. Dept. Agr. Div. Ent. Bul. 3, N.S., pp. 56-71. 
®H.S, Dept. Agr. Div. Ent. Bul. 30, N.S., pp. 34 -37. 
