Lancaster Farming. Saturday. April 26. 1975 56 Fungicide Wipes Out Fuaarlum rot, often the number one cause of losses to growers and planters of seed potatoes, conceivably might be a thing of the past If tubers or prccut seed pieces are protected with ex perimental fungicides tested in Maine and North Carolina. Two-to-thrccfold greater yields of potatoes resulted in tests with seed treated with either of two experimental fingicides, as compared to untreated check lots. Plant pathologists Simeon S. Leach of USDA's Agricultrual Research Service and Lowell W. Nielsen of the North Carolina Agricultural Experiment Station at Raleigh, obtained these results on Pungo seed potatoes treated with 2-{4- thiazolyD-benzimidazole and FORD TRACTORS 2000 Gas CL 20 Loader 2000 Diesel C L 40 Loader 3000 Diesel 8 n 4000 Gas N A A 4000 SU Gas 600 4000 SU Diesel 800 5000 Diesel 3000 5200 Diesel 5000 6 X 7200 Diesel 500 0 6 Y 3400 Diesel 450 0 JLB 5500 TLB KELLER BROS. TRACTOR CO. Buffalo Springs Call (717) 949-6501 10 Miles North of Lititz I I I I Lancaster Farming 1 Year - Only $ 3.00 , 52 Issues - Less than 6* per week SEND A GIFT SUBSCRIPTION TO Marne Address □ Enclosed is $3 for 1 yr. (52 issues) gift subscription. □ Enclosed is $6 for 2 yr [lO4 issues] gift subscription. □ Send a gift card with my name on it to the above. Sign the card- PLEASE MAIL THIS FORM TO LANCASTER FARMING with mcthyl-1- (butylcarbnmonyl)-2- bcnzlmldazolccarbamatc. These experimental materials must be registered with the Environmental Protection Agency by the manufacturers before they may be used on seed potatoes. The treatments resulted in a better stand • more vigorous growth, fewer small plants, and correspondingly greater yields than from untreated seed. Pilot test yields for the control polt totaled 67 pounds per 100 feet of plot, while potatoes treated with the second fungicide yielded 170 pounds per 100 feet of plot. These yields demonstrate a nearly 100 percent control of the disease organisms in SUBSCRIBE TO Or, if you prefer - 2 years *6.00 P.O. BOX 266, LITITZ, PA 17543 Potato Fusarium Rot storage, shipment, and prcplanting periods as well as in the pre-emergence interval for the planted seed. Dr. teach obtained ad ditional evidence of the ef fectiveness of the treatments in contamination studies with 120 barrels of Russett Burbank potatoes, at Orono. After 5 months in storage, fewer than 0.5 percent of the treated tubers became in fected, as compared with 4 percent of an untreated check lot. The control lot represents 375 barrels, or a $2,225 loss, from a 15,000- barrel commercial storage facility. In the Maine and North Carolina experiments, Dr. Leach and Dr. Nielsen ex posed the potatoes to con ditions more severe than most growers usually ex perience. Potatoes with artificially-induced in fections were used in the tests. Moreover, seed storage conditions in Maine and unusually cool, spring growing conditions in North Carolina favored develop ment of fusarium rot. Ac cordingly, the good results obtained with the fungicides are all the more striking. Both intact tubers and cut seed pieces were treated with the fungicides. The experimental compounds were diluted and applied at the same rate. They were diluted to a concentration of 2 pounds of fungicide per 100 gallons of water. They were then applied by an aerosol fogger at a rate of 1 gallon of diluted solution per 2,000 pounds of potatoes as the I WANT TO SUBSCRIBE. Name Address □ Enclosed is $3 for 1 yr. (52 issues] □ Enclosed is $6 for 2 yrs. (104 issues] I first saw Lancaster Farming: □ In a friend’s home □ In a Agribusiness office □ In a County Agent or other government office □ Other (Where] tubers passed over a roller table. Dr. Leach employed conventional commercial management practices to maintain desirable en vironmental storage con ditions for the intact tubers. Similar storage practices were used for the precut seed pieces, plus use of con ventional wound healing procedures. Precut seed produced somewhat higher yields than did treated fresh cut seed in North Carolina when wet and cold soil conditions prevailed at planting and the early part of the growing season. In Maine, however, with ex cellent growing conditions at planting and through the early states of growth, treated fresheut seed produced higher yields. In addition to the fungicide experiments, decon tamination was tested by washing and brushing potatoes before shipment. Yields in North Carolina showed a slight advantage in favor of washing, but Maine yields indicated no ad vantage for washing or brushing. 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Significant historical Pennsylvania newspapers