6 
STATE AGRICULTURAL COLLEGE 
of spraying which will no doubt prove effective in holding peach 
mildew in check. 
In his “Fruits of California” Wickson, on the subject of com¬ 
bating mildew says: 
“This has been effectually done by thorough sulphuring. Mr. Klee 
advises three applications where mildew is apt to be bad; the first one 
very early in the season.” 
Owing to the smooth surface of the foliage of the peach such 
applications would necessarily have to be made early in the morn¬ 
ing or after a rain, while the foliage is damp. Though the applica¬ 
tion is generally a very simple matter when the dust sprayer is at 
hand, it will not, as a rule, prove as satisfactory as other methods. 
Lodeman, in his “Spraying of Plants,” says: 
“It is probable that the disease can be held in check by spraying the 
trees with Bordeaux Mixture as soon as the fruit has set, and follow this 
at intervals of two weeks by two treatments of one ounce of carbonate of 
copper dissolved in ammonia and diluted with twelve gallons of water.” 
Peach mildew being a surface grower there is no reason why any 
of our standard fungicides might not be employed in fightingit. A tlior 
ougli spraying, before the trees come into bloom, with formula A or 
C, is recommended. After the blossoms have fallen , an application 
of B or D should be made. Follow this at intervals of ten days or 
two weeks with one or two more applications of B or D. While A 
and E are sometimes recommended for use on the peach while the 
tree is in full leaf they are liable to burn the foliage more or less, 
and though it may not prove dangerous to the life or health of the 
tree, it is well to give up their use for others that are safe as well as 
efficient. Formula B is a modification of the regular Bordeaux mix- 
ture sometimes recommended for the peach, and can be safely used 
upon the peach during the growing period. Formula E is a very 
safe and effective spray for the first application before the leaves 
come out, but others given are much more simple in preparation and 
just as effective. 
Formula A. 
-Bordeaux Mixture. - 
Copper sulphate (Blue stone or Blue vitriol), 4 lbs. 
Quick lime ...........4 lbs. 
Water ......45 gal. 
Formula B.—Copper sulphate......2 lbs. 
Quick lime. . '. 4 lbs 
Water . 45 gal. 
Formula C.—Copper sulphate.1 lbs. 
Water.25 gal. 
Formula D.—Copper sulphate.1 lb. 
Water.400 gal. 
Formula E.—Copper carbonate.1 oz. 
Ammonia (enough to disolve copper carbonate.) 
Water.12 gal. 
The effectiveness of any of these sprays depends upon the 
