` Insecticides mid Fimgicides. 25
— barrels or sacks that have not been treated with the forma-
  lin. By having a number of barrels at hand the work pro-
  ceeds rapidly.
¢ Oats and wheat liable to smut may be treated by sprink-
. ling the seed with dilute formalin (1 pint in a barrel of _
c water) until every seed is moist, not wet, then leaving for
several hours in a heap, Hnally spreading out to dry. ’ ..
Fumes of formalin produced either by heat or by the use
. ` of permanganate of potash have been recommended as a
remedy for potato scab, but my experience with the fumes
· a has not been such as to warrant me in recommending them
for this or for other purposes.
Y BICHLORID OF MERCURY.
· A very poisonous chemical, valuable in dilute solutions
` (1 part in 1000) as a disinfectant, and particularly good as a
s remedy for potato scab. The whitish, crystallin, very heavy
material is dangerous to have about, since it may attract the
attention of children, or animals. It should of course always
be kept labeled as a poison. It dissolves slowly in cold water,
and it is best therefore to make use of heat, afterward turn-
ing the dissolved poison into the larger quantity of water
` required, best kept in a barrel. Ihave had good results in
[_ checking potato scab, using 4 ounces in 30 gallons of water
and soaking the seed potatoes one hour. They were placed
i in the fluid in gunnysacks and afterward spread out on a
I barn floor to dry.
I It is very essential that poisoned potatoes be not left
i . where stock will eat them, and the poisonous iiuid must be
  disposed of, after treating the seed, so that it will do no harm.
, LIME-SULPHLJR WASH.
i This preparation of sulphur and lime has already been
i mentioned under insecticides. It has undoubted fungicide
5 value both in concentrated and dilute preparations. For fo-
» liage the latter must always be used. Even the sulphur alone
thickly strewn over leaves is a fairly good remedy for mil-
I