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Presented at the 9 th International Working Conference on Stored-Product Protection, 15-18 October 2006, Campinas, Brazil. N.
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Stored-Product Protection, 15-18 October 2006, Campinas, Brazil
Fig.1. Picture showing the grain cleaning facility (3.2 million bushels storage capacity) and railroad yard. The houses were located to the north and south of the facility.
Bhadriraju Subramanyam and Xingwei Hou
Department of Grain Science and Industry
Kansas State University, Manhattan, KS 66506, USA
Fig. 3. Frequency distribution of beetles captured in outdoor traps
Fig. 4. Contour map of outdoor trap captures
Materials and Methods
Fig. 6. Comparison of beetle captures among four locations
Fig. 5. Beetle captures among cleaning facility floors
The number of traps and sampling schedules are shown in the table below. Pheromone-baited sticky traps were placed on all five floors of the facility, within the railroad yard, and the four corners of 31 houses. In addition, food and pheromone-baited pitfall traps were placed in 26 houses to monitor beetles in various floors and rooms. Traps placed outdoor were distributed as shown in Fig 2.
Fig. 8. Frequency distribution of
captures in pitfall traps inside
houses (N = 235 traps)
Fig. 7. Comparison of beetles captured
in traps placed around houses
Annoyed by the infestation of red flour beetles, Tribolium castaneum (Herbst), inside homes, the residents living nearby a grain cleaning facility requested us to investigate the magnitude of the infestation. The presence of the cleaning facility prevented us from conducting a mark-release-recapture study. To study the beetle presence and distribution, only traps were used at the facility in the railroad yard to the south of the facility, and homes to the north and south of the facility during July to October in 1998.
Fig. 9. Pitfall trap captures of beetles
inside houses by floor (N = 235)
Fig. 10. Pitfall trap captures of beetles
inside houses by room (N = 235)
* pitfall traps
Fig.2. Sticky traps (boxed in the top picture) were placed outdoors at the cleaning facility (top), houses (middle), and railroad yard (bottom). Pitfall traps (boxed in the middle picture) were placed inside of houses.
Acknowledgement:This project was supported by the Minnesota Department of Agriculture.