. Bulletin. Agriculture. SPEAYINCI WITH FUNGICIDES. 43 taken in weighing the proper amount of chemicals. The custom of guessing at the amounts invariably results in a poor mixture. Stock solutions of the copper sulphate, 1 or 2 pounds to the gallon, can be made and kept without deterioration, evaporation being considered. (1>) On the thoroughness with which spraying is done.—Onty nozzles which throw a fine spray should be used. The Vermorel is the stand ard nozzle for good work. 1 n spraying, the old precept that all parts of a tree should be reached by the spray holds good. With a fungus l
. Bulletin. Agriculture. SPEAYINCI WITH FUNGICIDES. 43 taken in weighing the proper amount of chemicals. The custom of guessing at the amounts invariably results in a poor mixture. Stock solutions of the copper sulphate, 1 or 2 pounds to the gallon, can be made and kept without deterioration, evaporation being considered. (1>) On the thoroughness with which spraying is done.—Onty nozzles which throw a fine spray should be used. The Vermorel is the stand ard nozzle for good work. 1 n spraying, the old precept that all parts of a tree should be reached by the spray holds good. With a fungus like that of the bitter rot, where a large number of spores may reach a fruit, thorough spraying alone will be effective. The apparent failure to control the bitter rot in many instances is doubtless due to the fact that even with the best spraying it is impossible to cover the. Fig. 9.—Arrangment of vats used in making Bordeaux mixture. entire fruit with the fungicide. Numerous fruits were found on sprayed trees where the fungus had started to grow between points on the fruit covered with the fungicide. It is very desirable that further information concerning the number of sprayed fruits actually rotted be obtained. (2) Is winter treatment of the dormant trees of any assistance in th, process?—The spraying of trees before the buds opened showed no apparent benefit. • This, however, ought not to be taken as conclusive, especially in viewT of the recent discovery of a stage in the life history of the bitter-rot fungus in the wood and bark of the apple tree. In the absence of an}T data as to the exact time when this bark stage—the canker—is reached, it may be that winter spraying will to some extent check the development of possible Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United St
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