LINN COUNTY NURSERY, CENTER POINT, IOWA 
37 
FUNGICIDES — BORDEAUX MIXTURE — Continued. 
DILUTE BORDEAUX MIXTURE. 
This mixture is made exactly as the above with the exception that only 2 
pounds of copper sulphate and 2 pounds o£ lime are used to each barrel of 
water. This mixture should be used for trees having a tender foliage, such as 
the peach and Japanese plum. 
BORDEAUX MIXTURE TEST. 
The quantity of lime required in Bordeaux Mixture varies considerably 
with the quality of rock from which it is made. For this reason it is advis- 
table to test each lot of the Bordeaux mixture after it is made up. 
To ascertain if sufficient lime has been added, place a small quantity of 
the Bordeaux Mixture in a saucer and add two or three drops of the prussiate 
of potash. If this changes the Bordeaux Mixture to a reddish brown color, 
there Is not enough lime present; add* more lime water and test again. 
The prussiate of potash may be obtained at any durg store in the crystal- 
ized form. The stock solution for the entire season may be prepared by adding 
just enough water to dissolve the crystals. Only a drop or two is required for 
each test and ten or fifteen cents worth is ample for the entire season. 
COMBINATION OF FUNGICIDE AND INSECTICIDE. 
When spraying for a fungous disease except when plants are in the dor- 
mant state, an arsenical mixture may be added to the Bordeaux to advantage 
and the spraying will be effective against the biting insects as well as plant 
diseases. To the Bordeaux add the usual amount of Paris green, lead arsenite 
or arsenite of lime, letting the Bordeaux answer for the specified amount of 
water. 
AMMONICAL COPPER CARBONATE. 
Copper Carbonate 5 ounces 
Ammonia 3 quarts 
Water (one barrel) 40 to 50 gallons 
Dissolve the copper carbonate in the ammonia. The ammonia and con- 
centrated solution may be kept in glass or stone .iars tightly corked. When 
ready for use, dilute with water. This is a clear fungicide and is convenietit 
to use when Bordeaux Mixture would stain the fruit. 
POTASSIUM SULFID (Liver of Sulphur.) 
Dissolve two ounces in six gallons of water and apply at once. This mix- 
ture deteriorates rapidly and should not be prepared until ready for applica- 
tion. This is an effective spray for mi?dew on gooseberries and currants. 
CORROSIVE SUBLIMATE. 
For potato scab soak the tubers for W» hours in a solution of 2 ounces of 
corrosive sublimate in 16 gallons of water. When dry cut up for planting. 
Corrosive sublimate is a fatal poison if taken internally. It also corrodes 
metals. The solution should therefore be made in wooden vessels. All tteated 
seed should be planted, and any solution left over should be poured in the 
ground. 
FORMALINE — Used Also for Potnto Scah. 
Soak tubers for 2 hours in a solution of commercial formaline, S oz. (40 
per cent solution) in 15 gallons of water. 
DUST SPRAYS. 
Insecticides or fungicides may be used in dust form and applied bv a dust 
spray machine. They should be applied with slaked lime, land plaster "or some 
other perfectly dry powder. Use Paris green and other arsenites at the rate of 
1 lb. to 10 lbs. of the dry powder. Bordeaux may be made in the usual way 
and water evaporated and residue pulverized and applied dry. 
A certificate of nursery Inspection, certifying: that our irurweries have 
been examined and found to he free from all Insects, is attached to every 
order. 
Beautify your home; Increase your profits; plant Snyder's Trees. 
We wish to emphasise this fact, the soil cnnn< t he too vrell prepared. 
Plow thoroughly and cultivate frequently. 
