73 
lution, as it was received from the manufacturers, was used on only 
5 trees, with a ratio of September benefit figured at 55 per cent. — 
substantially the same as that of the Oregon washes just referred to. 
"Con Sol," diluted with water at the rate of i to 40, and applied cold 
to 9 trees, gave a ratio of only 15 per cent, of benefit. The Oregon 
washes cost at the rate of $1.07 per hundred gallons for materials; 
"Con Sol," $2.40; and "Calcothion," $5. 
It may be provisionally inferred from these small experiments 
that neither "of these two compounds has any advantage over the 
better-known washes except in point of convenience, and this must 
be paid for by a considerably higher cost than that of the lime and 
sulphur mixtures — more than twice as great for "Con Sol," and 
nearly five times as great for "Calcothion." 
MiscEivi^ANEous Additionai. Insecticides. 
Only one of the kerosene insecticides was tried on a number of 
trees sufficient to give any permanent value to the experiment. 
The soluble petroleum compound known as "Scalecide," applied 
March 24 in a 5 per cent, mixture with water to 3 1 trees in Orchard 
I., showed a September infestation of 2.6 degrees, equivalent to a 
benefit of 47 per cent. — decidedly less than that of any of the lime 
and sulphur washes used in March, as shown by Table I., and con- 
siderably less than that of the Oregon washes of Table II. It seems to 
belong, in insecticidal effect, with the Oregon and California washes 
as applied in January, its 47 per cent, of benefit being substantially 
the same as the 46 per cent, of the latter treatment. Its cost was 
$2.50 per hundred gallons — essentially the same as "Con Sol" — and 
its benefit was three times as great. It was apparently the best of 
the ready-made insecticides tested by us last year. 
A kerosene preparation known and sold as "Frutolin" was tried 
March 24 on 3 trees, and several variations of a 20 per cent, kerosene 
mixture made with water and hydrated lime in lieu of soap solution 
were applied on the same day to 5 more trees, all in Orchard I. 
The results were essentially the same with all these mixtures, so far 
as one can judge from these small experiments. The trees treated 
averaged 4 degrees of infestation September 10, giving a benefit 
ratio of 19 per cent, as compared with the check of their orchard. 
The cost of the "Frutolin" mixture was $25.10 per hundred gallons, 
and that of the so-called emulsions made with kerosene and 
lime was $1.07. 
Two simple soap solutions were used, whale-oil soap on 117 
trees, and "Tak-a-nap" soap on 8 trees, the former in Orchard II. 
