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Effect of post-harvest residue and methods of residue removal on ground inhabiting arthropod predators in sugarcane
- White, William H., Viator, Ryan P., White, Paul M.
- Journal of the American Society of Sugar Cane Technologists 2011 v.31 no.2011 pp. 39
- Araneae, Carabidae, Dermaptera, Diatraea saccharalis, Formicidae, Gryllidae, beneficial insects, biological control agents, burning, clay soils, crop residues, crops, harvesting, loam soils, pitfall traps, planting, postharvest treatment, predators, soil texture, sugarcane, texture
- The effect of the blanket of post-harvest crop residue generated during green-cane harvesting on ground inhabiting arthropod predators of the sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae), was evaluated in two experiments spanning a four year period. Crop residue was either allowed to remain on the field surface or completely removed by burning or repositioned to the row sides by mechanically brushing. In 2007 and 2008, pitfall traps were established in the first- and second-ratoon crops from cane planted in a fine textured clay soil. In 2009 and 2010, pitfall traps were established in the first- and second-ratoon crops from cane planted in a coarser textured soil. When averaged across years and soil types, ants (Hymenoptera: Formicidae) were the most abundant predatory taxa representing approximately 70% of the total predators caught. Ants were more abundant in the fine textured clay soil experiment than in the coarser texture loam soil experiment. Ants and earwigs (Dermaptera) were generally more abundant where the blanket of post-harvest crop residue was not removed or repositioned to the row sides, while burning to remove the residue appeared to have a detrimental impact on their numbers. Brushing the tops of rows to remove crop residue was intermediate in effect. Ground beetles (Coleoptera: Carabidae), spiders (Araneida), and crickets (Orthoptera: Gryllidae) were impacted minimally by the treatments.