1 / 24

Project #3: How to effectively manage SCA in the presence of other pests?

This project aims to determine the efficacy of insecticide mixes in controlling multiple pests in sorghum, while also assessing their impact on beneficial insects. The study will focus on SCA and headworms, as well as SCA and midge, and evaluate the timing of applications for optimal control. The results will help identify economically feasible insecticide mixes and study the impact of natural enemies on SCA populations.

dlovelady
Download Presentation

Project #3: How to effectively manage SCA in the presence of other pests?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Project #3: How to effectively manage SCA in the presence of other pests? Leads: David Kerns and Gus Lorenz Robert Bowling, David Buntin, Jeff Gore, Brian McCornack and Ali Zarrabi

  2. Objectives • Determine the efficacy of insecticide mixes towards multiple pests in sorghum. • Determine the impact of insecticide mixes targeting multiple pests on beneficial insects.

  3. Design & Methods • Replicated, small plot, RCB (4-5 replicates) • Two test options • Targeting SCA + Headworms • Targeting SCA + Midge • Application timing on one or both pest complexes as available; emphasis on midge test where midge are problematic • SCA and beneficials • Sampling of leaves (10 upper, 10 lower) per plot, estimate number of SCA count beneficals. • Precounts, 2-3 DAT, and 7, 14, 21 DAT • Headworm • Bucket sample 10 heads per plot, count and ID. • Precounts, 2-3 DAT and 7 DAT. • Midge • Precounts of adults visually from 20 panicles/plot. • 12 DAT, remove and bag 10 heads/plot, count emerged adults 7-12 days later. • At soft dough estimate percentage damage kernel. • Yield and adjust to 14% moisture

  4. Locations

  5. Headworm Tests

  6. SCA Populations

  7. SCATransform

  8. SCASivanto Prime

  9. Headworm Populations

  10. HeadwormsTransform or Sivanto

  11. Midge Tests

  12. Sorghum Midge

  13. Sorghum Midge No yield response

  14. Sorghum Midge No yield response

  15. Sorghum Midge No yield response

  16. BeneficialPopulations

  17. BeneficialsTransform

  18. BeneficialsSivanto Prime

  19. BeneficialsSivanto Prime

  20. Key Learning Points • Neither Transform nor Sivanto Prime appear to impact the efficacy of insecticides targeting headworm complex. • Pyrethroids may negatively impact SCA control achieved by Transform but did not appear to affect Sivanto Prime as much. • Blackhawk, Belt, Lannate and Prevathon all offered good headworm control. • Diamond was ineffective (timing issue?) and Pyrethroids were inconsistent (probably due to resistance in some area).

  21. Key Learning Points (cont.) • Good sorghum midge tests are difficult to achieve. • Sorghum midge is probably over-emphasized as a pest (too many automatic sprays). • Were unable to assess midge/SCA treatment combinations. • Under low to moderate pest pressure, Blackhawk, Lorsbanand Pyrethroids all appeared be effective in preventing midge injury. • Diamond was inconsistent; higher rates may be effective.

  22. Key Learning Points (cont.) • SCA arthropod natural enemies were not numerous. • Lady beetles appear to the dominant natural enemy of SCA. • Where mixed with Transform; Belt, Prevathon, Lannate and Diamond all has fewer predators than the untreated at 2 DAT. • Blackhawk and Pyrethroids did not severely impact lady beetles at 2 DAT.

  23. Next Steps • Determine economically feasible insecticide mixes for multi-pest targets. • Comprehensive study of impact of natural enemies on SCA populations. • Specifically designed and focused. • How important are they? • What are the impacts of insecticides have on them? • Sorghum midge education. • Are they as common a problem as they are made out to be?

  24. Questions?

More Related