Dl6*Lancaster Farming Saturday, March 11,1989 Researchers Study Band WHITE PLAINS. N.Y. When planning for soil insecticide applications this spring, should you set up your planter for in furrow or band application? Does either method provide better root worm control or help increase yields? Several researchers at universi ties in the Com Belt have tackled these questions and their conclu sions suggest that the performance of both application methods is similar, with banding specifi cally "T-banding” getting the slight numerical edge on the root rating scale. Researchers also pointed out that banding offers greater product flexibility. All soil insecticides can be applied in a band. But most cannot be applied in-furrow. Fewer Choices According to Dr, Tom Turpin, Purdue University research and extension entomologist, in-funow offers less flexibility in a farmer’s choice of insecticide because most products aren’t labeled for it. “This limits your choice to two or three insecticides,” he says. Another problem farmers can encounter with in-furrow applica tion is volatilization. “When you put the soil insecti cide down inside the furrow, in order to protect the roots, the material must move up in the soil as well as down,” Turpin explains. Tiberdome Incorporated made with fiberglass, the material of the future and proven in the past Tiberdome Incorporated Write For Details Or Contact Tour Local Silo Company “With most products, the insec ticide tends to move downward with the movement of water,” he says. ‘This situation allows root worms to come in over the top of the insecticide and creates a situa tion where damage can occur.” Economic Considerations Dr. Jon Tollefson, director for the lowa State University com insect research project, says in furrow application also may have economic limitations. “If a grower feels that he has to put his insecticide on in-furrow, he may not be able to use the most economical material because it may not be labeled for in-furrow use,” says Tollefson. “Instead of focusing on the method of appli cation, a farmer should look at how a material performs in his area. Then he should look at the cost and how it fits into his farm ing program, since cost is such an important facto- now.” Performance About Equal Looking strictly at perfor mance, most universities have found more differences among com rootworm insecticides than they have between band in-furrow application. In a two-year study at lowa State University, scientists eva luated three tillage systems, sever al methods of incorporation. SILO CHUTE P.O. BOX 11 • Lake Mills, Wl 53551 (414) 648-8376 ...mouJktb’tagt Vs. In-Furrow Insecticide Application placement of banding units in front of or behind presswheels, and band versus in-furrow appli cation. About 6 percent residue was left under conventional til lage. about 30 percent with a single discing, and about 60 to 65 percent with no-till. According to Tollefson, they found no significant tillage insecticide interactions, nor any significant differences in band versus in-furrow placement, although band did show a slight edge over in-furrow. Best performance for bands was in conventional tillage, as the sci entist expected. Performance diminished slightly with 30 per cent residue cover, and slightly more with no-till. But changes were so small that it essentially brought banding down to the same level of performance as the in furrow treatment. “If you look at the big picture of ail of our studies over IS years, our band treatments beat in furrow treatments about 60 per cent of the time, and the difference is about one-half point on a root rating scale of one to six,” notes Tollefson. He adds that in the 1988 stu dies, the difference was only one BE A SAFER WOOD CUTTER ST/HL 028SWB • 16' Bar & Chain • 3.14 ci; 12.4 Iba. powerhead weight • Anti-vibration system • Quickstep™ inertia chain brake • LIFETIME ELECTRONIC IGNITION warranty • Front and rear hand guards • Automatic oiling • American Made in Virginia Beach, Va. 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T banding also gives the grower more Insecticide options from which to choose. twentieth of a point. “Neither one half nor one-twentieth of a point equals a difference that will show up in a yield, which is what inter ests a farmer. “But, if we had to pick one method of application, our overall choice would be the T-band because it’s beat the in-furrow 60 percent of the time,” Tollefson says. “Even though it was only by a minimal margin, it still came out on top.” WINTER SPECIALS Was $404.95 | in 1988 NOW , $349 9S ST/HL'j*-**. # Dr. John Wedberg, University of Wisconsin extension entomolo gist, says that studies done in his state show banding and in-furrow applications to be almost identical. “In our research trials using a John Deere 7000 planter, we have not been able to find an advantage to either method of performance,” he says. 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