PRESCOTT. Wis. The new est weapon in the continuing fight against the yield-robbing soybean cyst nematode (SCN) is now available from Jacques Seed Company. Jacques 380 C is a Group 111 variety that combines resistance to SCN Races 3 and 4 with mod erately high phytophthora field tolerance and very good yield potential. “Jacques 380 C’s late Group 111 maturity makes it widely adapted to some major soybean-producing areas,” said Jacques soybean breeder Tim Foley. “It also stands out for its very good shatter resistance.” The variety is rated very good for seedling vigor as well, and develops a medium-height, medium-canopy plant with very good standability. J-380C also has excellent row-width versatility and drouth stress tolerance. Up to now, incorporation of SCN-resistance into previously susceptible varieties has resulted in a 5 percent to 10 percent reduc tion in yield potential compared to the susceptible variety, Foley said. However, even though yield data are preliminary, Foley reports that Jacques 380 C appears to be a very competitive yielder compared to susceptible varieties of die same maturity grown in non-infested fields. University of Kentucky ARNETTS GARAGE Rt. g Box 125 Hagerstown, MO 21740 (301) 733-0515 S.Q. LEWIS AND SON West Qrove, PA 10300 (215) 869-9440 869-2214 Jacques Releases research has shown that when cyst numbers ate between SO and 100 per pint of soil sample, yield decreases of 15 percent to 25 per cent can occur. As cyst numbers increase to between 200 and 300 per sample, yield losses can reach 50 percent. The only way to stay ahead of the pest, believes Dr. Greg Tylka, lowa State University nematolo gist, is to get a soil analysis now, whether you’ve spotted visual symptoms or not. "If the farmer doesn’t have the cyst nematode, great! If the num bers are low, he can establish a management program to keep them under control. If the numbers are moderate to high, he’s probab ly going to have to quit producing soybeans in those fields for awhile,” Since SCN was first found in North Carolina in 1954, it has been steadily pushing north and west Thought originally to be a southern producer’s problem, it has now been identified in more than 22 soybean-producing states and new areas are being reported every year. The nematode has been confirmed in 49 of lowa’s 99 counties, for example, and also in areas of Minnesota and Wisconsin. SCN is a microscopic round worm varying in length from 1/125" to 1/5”. It feeds on the roots of the soybean plant, reduc- COMPACT POWER PEOPLE'S SALES & SERVICE Oakland Mills, PA 17078 (717) 463-2735 SCHREFFLER EQUIPMENT Pitman, PA 17084 (717) 648-1120 R.W. KELLER SALES Parkasls, PA 18044 (215) 257-0101 GUS FARM EQUIPMENT Seven Valleys, PA 17360-0085 (717) 428-1967 LEBANON VALLEY IMPLEMENT CO. 700 E. Linden St. Richland, PA 17087 (717) 866-7518 ■ Synchro shuttle transmission ■ Standard integral power steering for precise control ■ Tilt steering wheel column for easy to reach controls ■ Open, flat platform for maximum operator comfort and CTF SALES & SERVICE, INC. Comly'* Turf Farm, Inc. Foreit Grove Rd. Wycombe, PA 16980 (215) 598-7157 Nematode-Resistant Soy Variety ing its ability to absorb water and nutrients, thus lowering yield. Pre gnant female cyst nematodes are visible as white cysts on the roots at the early flowering stage in late June or early July. Sixteen known races or types of the pest have been identified. Visual symptoms include plant stunting and yellowing. Affected plants are usually found in circular patches or oblong areas lhaj. fol low the direction of tillage. Plants that are already under stress due to drouth or other dis eases are also more prone to SCN damage. A management program that keeps plants as healthy as pos sible will minimize yield loss. “1 liken it to the human body,” said Tylka. “If you’re already weak from a cold, the effects you’ll feel from some other disease are much worse. “If the soybean plant is suffer ing from the effects of drouth or iron deficiency chlorosis, for example, the effect of the nema tode is much worse.” Once nematodes are identified as a problem, there are several management techniques farmers can utilize to keep yield loss as low as possible, said Dr. Dennis Byron, Jacques director of soy bean research. ‘The most effective method of controlling the pest, once it’s pre sent, is crop rotation,” said Byron. "A four-year plan that has worked well is to plant a SCN-resistant convenience TRIPLE H EQUIPMENT Peach Bottom, PA 17563 (717) 548-3775 M.M. WEAVER & SON N. Groffdale Rd. Leola, PA 17540 (717) 656-2321 N.H. FLICKER & SONS, INC. Maxatawny, PA 19538 (215) 683-7252 Lancaster Farming, Saturday, December 21, 1991-Cll soybean variety the first year, com the next year, a susceptible soy bean variety the third year, and then back to com the fourth year. Three out of the four years you are growing a crop that is a non-host.” It’s good advice, cautions Byron, to have another soil sample analyzed to determine the remain ing levels of SCN before planting the susceptible variety in the third year. Unfortunately, farmers can’t avoid SCN damage by planting just one resistant variety, said Byron. “Research has shown the nema tode can quickly shift from one race to another. So if you plant the same resistant variety year after year, it can actually promote increased infestation of another nematode race that can attack the resistant variety.” There can also be advantages to planting a resistant/susceptiblc soybean seed blend, said Byron. Under SCN pressure, the grower can expect a higher level of over all field yield. The high-yielding Pointsettia DOYLESTOWN (Bucks Co.) —“Poinsettia lovers can shop with confidence this holiday season,” says Tim Malone, executive direc tor of the newly-formed Poinsettia Growers Association. “Rumors of any infestation problems in poinsettias are simply untrue.” The vegetable and fruit industry in California has received national attention focused on their whitefly NEWSPAPER BEDDING PTO AND ENGINE UNITS AVAILABLE CALL FOR DEMONSTRATION susceptible component of the blend will maintain high yields in non-infested and low cyst infested areas of the field, while the resis tant component will contribute reasonable yields in moderately infested areas. The Jacques Seed Company blend, 440 C Brand, is an early-to mid Group IV containing the Races 3 and 4 resistant compo nent. 440 C shows improved yield performance under low-to moderate SCN pressure. It pro duces medium-height plants that display very good lodging resis tance and very good shatter resistance. Even if you think you don’t have a SCN problc , the only way to tell for sure is to have a soil analysis done, said Tylka. And regardless of where you farm, the geographic expansion the pest has shown in the last 30 years means that if you grow soybeans, you’ll eventually have to make room in your management program for fighting soybean cyst nematode. Update problem. Unfortunately, the insect in question, called the Poinsettia Whitefly by the press, is really the Sweetpotato Whitefly, according to Penn State entomologist Paul Heller. This year, poinsettias are as least as pest free as in the past Also, poinsettias are not poison ous, which is another erroneous rumor. 8y...
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