. Cranberries; : the national cranberry magazine. Cranberries. when Dr. C. L. Shear showed that Bordeaux mixture materially re- duced field rots. In 1943, ferbam, a dithiocarbamate, was first tested by R. B. Wilcox. It has proved su- perior to Bordeaux except in 1945, when rain was recorded on nearly half the days from May thi-ough August. Neither Bordeaux nor fer- bam gave satisfactory control un- der such weather conditions. The 1953 spray trials at Whites- bog', N. J., were designed to test ferbam further and other fungi- cides that have become prominent within the last few years. Because t
. Cranberries; : the national cranberry magazine. Cranberries. when Dr. C. L. Shear showed that Bordeaux mixture materially re- duced field rots. In 1943, ferbam, a dithiocarbamate, was first tested by R. B. Wilcox. It has proved su- perior to Bordeaux except in 1945, when rain was recorded on nearly half the days from May thi-ough August. Neither Bordeaux nor fer- bam gave satisfactory control un- der such weather conditions. The 1953 spray trials at Whites- bog', N. J., were designed to test ferbam further and other fungi- cides that have become prominent within the last few years. Because there has been considerable interest in the effects that minor elements may have on the physiology of the cranberry and the consequent pre- vention or delay in expression of rot, several minor elements were included in the trials. The fungicides used were Man- zate, zineb, ferbanr, ziram, and cap- tan, all at a concentration of 3 lbs, per gallons of water; tank- mixed ziram at a concentration of 1 qt. sodium dimethyldithiocarba- mate and 1 lb. ZnS04 per 100 gal- lons; and 8-8-10 Bordeaux. All were applied June 18 at approximately quarter-bloom and again on July 1 and July 13. A second ferbam treatment was applied June 25 at approximately mid-bloom and again on July 9 and July 13. The minor elements used included molybden- um in the form of sodium molyb- date at a concentration of 1 oz. per 100 gallons, and iron, manganese, copper, and zinc in chelated forms at a concentration of lbs. of the chelated compound per 100 gallons of water. Minor elements were ap- plied twice, June 25 and July 9. All sprays were applied at ap- proximately 300-350 gallons per acre. Although the spring months were unusually wet, the critical in- fection period, which appears to extend several weeks starting at blossom tim^e, was drier than nor- mal. Cranberries from plots treated with Manzate, zineb, and ferbam No. 1 and No. 2 showed an average of 93, 90, 86 and 88 percent less rot, respectively
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