DlO—Lancaster Farming, Saturday, February 14,1981 HERSHEY Bean root rots and pod rots are the two most im portant diseases on beans in Pennsylvania, according to Alan Mac Nab, of Penn State’s Plant Pathology Department. Bean root rots, characterized by root discoloration and rotting, can result in plant stunting, yellowing and dying of leaf margins, up to a 30 percent yield reduction, poorer quality pods, and a 30 percent increase in time required to grade harvested beans Bean root rots are caused by three fungi that may affect plants separately or in combination. Disease is most severe when beans are cropped continuously in the same field, a practice that allows buildup of the fungi in soil, and when conditions promote slow seed germination and plant growth such as poor drainage, wet soil, nutrient unbalance Much research has been con ducted to develop varieties with root rot resistance, with the ability to produce _}ugh yields and with high quality primarily by three researchers M. Dickson, New York; D. Hagedorn, Wisconsin, and Silbernagel, Washington. Line 767, developed by Dickson, has good root rot resistance and produces good yield. Three newer New York lines (528, 543, and 547) are thought to have good quality. Wise. (RRR) 46, developed by Hagedorn, is the third and best of three lines (following #B3 and 77) developed in Wisconsin. It has good root rot resistance and has the potential of producing high yields. Some plant breeders believe varieties with useful root rot resistance soon will be available for commercial use. Present controls include: —Rotate beans with other crops. —Use well-drained soil. —Seed as shallow as possible. —Treat seed with thiram or captan. —Use Demosan as an additional Exi Spi kni Growers listen to latest on bean rots seed or soil treatment —Provide adequate and balanced fertility levels. —Avoid close cultivation that breaks roots. —Do not return unnecessary refuse to fields. —Plow under refuse soon after harvest. Bean white mold pod rot, caused by the fungus Sclerontima sclerotiorum, is a serious problem m wet seasons, reported Mac Nab The fungus causes a wet rot on plant stems and on pods; during wet conditions, a dense white mold develops on rotted areas. Harvested beans are acceptable for processing only if less than 5 percent of pods are affected Above 5 percent, removal of rotted pods is not economically feasible. During wet conditions, white mold can develop very rapidly A field with an acceptable level of white mold one day frequently can have an unacceptable level the following day. Early harvests may help avoid white mold problems However, harvesting before most beans are mature results in lower yields Benlate sprays are labeled for control of white mold on snap beans, he pointed out Trials were conducted in com mercial fields in 1979 and 1980 to help determine whether the spray program is effective and economical to use Sprays were applied with a boom sprayer equipped with three D 4-25 hollow cone Tee-Jet nozzles per row, one nozzle over the row and drop nozzles at each side of each row. Disease occurred in 1979, a year with rainfall levels slightly above average, but not in 1980, a year with rainfall levels much below average. The recommended fungicide program resulted in a significant reduction m stalk rot (from 31.3 to 2.8 percent) and pod rot (from 2 3 to 0.1 percent), and a significant increase in yield (from 2 2 to 2.6 T/A) The grower-cooperators com pared cost of the spray program with value of increased yield associated with the spray treat ment. Assuming: Benlate cost 512/pound, two applications would be made at the rate of 1 pound per SILAGE AND FEED CARTS 34" Wide, 62" Long, 28” wide, 60" long, 53" high, capacity (to 35 high, capacity feed 35 to 40 Cows) 16” Ball Bearing wheels pneumatic or semi For very easy handling pneumatic wheels MANY OTHER SIZES AVAILABLE We Also Manufacture Swivel Casters for 16”, 12” and 10” wheels MANUFACTURED AND DISTRIBUTED BY SCENIC ROAD FARM SUPPLY 3539 Scenic Road Gordonville, Pa 17529 2Vt Mi Southwest of New Holland, l‘/2 Mi N of Intercourse -AUTHORIZED DEALERS AARONS. GROFF*SON RD#3, Ephrata, PA 17522 PH (717)354 4631 FARM BUREAU ATLEE F. REBERT 115 Washington Ave RD 2 Littlestown, PA Souderton. PA 18964 17057 PH (215)273 4355 PH (717) 359 5863 ROBERT GUTSHAU IRVIN J. PEACHEY RD 1212 Womelsdorl Star Route, Box 35 PA 19567 Belleville, PA 17004 PH (717) 933-4616 PH (717)483 6714 CHESTER INGRAM LAPP SHARPENING Hublersburg RD 2 SERVICE Bellefonte, PA 16823 Gibble Road, PH (814) 383 2798 Route 2, Box 276 Myerstown, Pa 17067 LAPP’S HARDWARE A DAIRY SUPPLIES Box 96, Loop Rd , RD4 DELIVERIES Quarryville PA 17566 AVAILABLE CAI/C ON LOWEST PRICED vflf U GRAIN BINS '■' ■ F Now Is The Time To Buy The Bin You Will need This Coming Year. Some Bins Are 41.4% Less Than Projected Prices For This Summer. EXAMPLE 30' 12372 Bu. Storage Capacity Secondary Bin *3125 Price This Summer Will Be; *4419 SAVINGS: $1294 or 41.4%! WE HAVE VARIOUS SIZE BINS IN STOCK WITH THE SAME KIND OF SAVINGS. CALL TODAY FOR THESE VERY, VERY LOW PRICES. MARTIN DISTRIBUTORS, INC. 520 PRESCOTT RD. f LEBANON, PA 17042 PH: 717-866-4906 or 866-4555 acre, application cost is $4 per acre per apphcation, price per ton of beans is $165, and yield is 2 tons per acre, it appears that a grower should spray to increase yield 0.2 tons per acre on 100 percent of the acreage, increase yield 0 5 tons per acre on 40 percent of the * <**»- 600 lbs Choice of 10” FARM BUREAU Mill Street Dublin, PA 18917 acreage, increase yield 1.0 tons per acre on 20 percent of the acreage; or prevent loss of beans (by rejection) from 10 percent of the acreage, concluded Mac Nab “Our present recommendation for white mold control is to apply Benlate 5096 WP at 1 lb./A when first blossoms open, and at 1 lb /A about 7 days later. Accurate timing and coverage are essen tial,” he said. 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