Combatting triazine-resistant weeds CHICAGO - Rotating crops and herbicide families is tt«?Tc£yto stopping the buildup and spread of triazine-resistant weeds, ac cording to University of Maryland Extension weed scientist, Dr. Ron Ritter, worldwide Researchers Farmhand, Inc. unveils new loader Farmhand, Inc. announces a loader for two wheel drive and front wheel assist tractors in the 80 to 180 horsepower range....the new 1140 Universal Fit Loader. It features a quick-tach mounting system (no tools required), Attachment Quick Coupler for quick attachment change and a hydraulic self-level valve option for bucket leveling during lift cycle. The frame cross tube has built-in reinforcement for protection against twisting. The new 1140 Loader has rear axle mountings for extra ground clearance and heavy duty stress proof pins. The life frame is constructed of Premium Strength Steel and has a lift capacity of up to 4,000 pounds; lift height is 13’6" or 14'6" using the high lift pin setting position. Farmhand, Inc., based on Excelsior, Minnesota, markets a wide range of loaders, manure spreaders, tillage and grinding equipment through dealers and distributors throughout the United States and Canada. For more information, contact Farmhand, Inc., 6421 Hazeltine Boulevard, Excelsior, Minnesota 55331. VISIT TAM AGRICORP. AT BOOTH #582 AND SEE THE REVOLUTIONARY PRATER BLUE STREAK FEED PROCESSOR ...the most advanced, accurate, on-farm feed mill available! PRATER’S BLUE STREAK TWIN SPIRAL MIXER Accurately mixes feed ingredients, in almost any ratio, in 2 to 6 minutes. • Low energy consumption • Minimum floor space requirement • Rugged construction • Low maintenance PRATER’S FULL SCREEN HAMMER MILL The easiest mill to service in the industry. Top center feed inlet and reversible rotor permits hammers to be worn on both edges before a change is necessary. PRATER OFFERS AUTOMATION TO FIT YOUR NEEDS Choose from a variety of control systems...automatic digital or manual input. Available with multi ration memory, output inventory control, and hard copy printer. THE PRATER BLUE STREAK FEED PROCESSOR IS HIGHLY ENERGY EFFICIENT, PRODUCING UP TO 25 TONS OF FEED A DAY AND USING ONLY 1 KW PER TON TO PROCESS IT. identified as many as 40 weed species that have developed a resistance to the triazine her bicides. More than 20 resistant species are found in the United States and Canada. Velvetleaf is the most recent addition to the list. According to have Dr. Ritter, triazine-resistant velvetleaf has been confirmed in Maryland. While resistance has been a problem for several years in the Northeast and'Mid-Atlantic states, the problem is starting to appear throughout the Midwest. University oT Wisconsin" agronomist, Dr. Jerry Doll, reports tha triazine-resistant common lambsquarters, which had been previously identified in 12 Wisconsin counties, has now spread into Portage, Outagamie, Waukesha, Langlade, Clark and Calumet Counties. The state’s first infestation of triazine-resistant redroot pigweed was confirmed in Brown County this year. According to Dr. Ellery Knake, Extension weed scientist at the University of Illinois, development of triazine-resistance has not generally been a serious problem in Illinois. About 11 million acres of com and nine million acres of soybeans are commonly grown in sequence, he says. Use of a variety of herbicides and rotating both crops and herbicides have helped to avoid the problem. However, Dr. Knake advises farmers who grow continuous com and do not rotate herbicides to be on the alert. Resistant pigweed has also spread into Shelby County, Ky. Dr. Mike Barrett, at the University of Kentucky, says pigweed is the first weed confirmed as resistant in the state. In lowa, triazine-resistant kochia has been identified in non cropland in Pottawatomie County, near Council Bluffs. Dr. Richard Fawcett, an independent crop consultant in Huxley, says several other non-crop areas in western lowa also look suspicious, but no other cases of triazine-resistance have been documented. Triazine-resistant kochia is also found in 10 counties in central and southwestern Nebraska. Triazine-resistant lamb squarters has been found for the past three years in Fillmore, Goodhue and Olmsted Counties in Minnesota. Until recently, triazine resistance was confined to areas where com was grown con tinuously and where triazine PRATER’S LOAD CELL WEIGHING SYSTEM Feed mill tests guarantee 99% \ weighing accuracy \ of load cells. v Accurately weighs bulk base or pre-mixes into the mixes. i PRATER’S FEED PROCESSOR “Full Screen" hammer mill powered by l x h HP motor. 36 heavy duty hammers run at only 1,800 RPM's to pro vide a very uniform grind. For adding micro ingredients, Prater offers an optional micro ingredient hopper. 717-432-9738 R.D. 1 Mountain Rd. Dillsburg, PA 17019 Lancaster Farming, Saturday, January 11, 1985-F9 herbicides were used year-after year. Repeated use of triazines can cause a shift among varieties, or “biotypes”, of weeds. Eventually, the resistant biotypes become dominant. Dr. Ritter says resistant weeds often appear in end rows and along the edges of a field. From there they spread to other areas of the field or farm by harvest equip ment, manure spreading and seed reproduction. Dr. Ritter recommends farmers clean machinery between fields to avoid spreading seed and avoid spreading contaminated manure in clean fields. “Fanners should also rotate crops and herbicides,” he says. “Herbicides from the same family shouldn’t be used every year. Escaped weeds should be con trolled with cultivation and her bicides with different modes of action than the triazines.” As a total weed control program, Dr. Ritter recommends a pre emergence application of an acetanilide-type herbicide, such as Lasso or Dual, for control of grasses and suppression of resistant pigweed, followed by 1 pint of Banvel herbicide for control of triazine-resistant broadleaf weeds, as well as other annual broadleaves and perennial seedlings. Rotating triazines won’t work. Once a biotype develops a resistance to one triazine, it is resistant to all of them. The triazine herbicides include: atrazine (AAtrex, Atranez, Griff ex) simazine (Princep, Simanex), cyanazine (Bladex), and the asymmetrical triazine metribuzin (Sencor, Lexone). Recent research also shows that triazine-resistant weeds also develop a resistance to the other photosynthesis-blocking her bicides, such as the substituted ureas (Lorox) and uracils (Hyvar). ■ 1 VICTORIA BINS TAM AGRI ALSO SERVES THE INDUSTRY WITH THESE TRUSTED \ PRODUCTS •S', _ ><oskamp fflL EV !* 2 0 i i o 3 K E 0
Significant historical Pennsylvania newspapers