Rootworm areawide management project in Kansas

摘要

abstract_textpKansas State University initiated a Rootworm Areawide Management Project (RAMP) under the auspices of the United States Department of Agriculture (USDA) in 1997. This 4-yr project is being conducted in north central Kansas with the cooperation of 47 owners or operators. The project is a concerted effort to suppress adult western corn rootworms, Diabrotica virgifera virgifera LeConte, over a large contiguous area of continuous corn (Zea mays L.) production by using the principles of integrated pest management (IPM), including carefully timed applications of the semiochemical insecticide-bait SLAM(R). In addition to this adult suppression program, technology is being developed or modified to determine treatment thresholds and application timing so that private consultants and growers can continue rootworm areawide suppression after the year 2000, when the intensive research program terminates. The managed area is located in 41.4-km(2) (16-mi(2)) of intensely irrigated corn-soybean production near Scandia, Kansas. A similar 10.36-km(2) (4-mi(2)) area near the town of Norway, Kansas, will serve as a control and will not be treated with Slam throughout the duration of this project. One hundred and twenty-one cornfields were monitored in 1997 with Pherocon AM(R) yellow sticky traps. Treatment thresholds were greater than or equal to 35 western corn rootworm adults per sticky trap per week or 0.6 western corn rootworm per plant based upon plant inspections that were used to supplement trap counts. One thousand one hundred and seventy-seven hectares required treatment (68.5 of the total from the managed area). The Slam application resulted in greater than or equal to 95 adult western corn rootworm control in all treated fields. Treated and untreated fields were selected for 10 additional experiments that were initiated to refine sampling technology necessary for adequate timing of insecticide applications. All experiments will be continued, with appropriate modifications, throughout the duration of the project./p/abstract_text