IPM Steps. Control Methods

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1 Integrated Pest Management University of Nebraska-Lincoln Extension Jenny Rees, Ron Seymour, Sarah Sivits, Wayne Ohnesorg, and Megan Taylor IPM Broad based approach Integration of practices for economic control of pests Type of Control Method IPM Type of Pest Resistance Management Management Thresholds 1

2 IPM Steps 1. Identify pest 2. Evaluate pest damage 3. Determine need for controls 4. Consider multiple control options 5. Select best combination of control options 6. Monitor your selection Control Methods Utilization of multiple control options Regulatory Resistance / Tolerance Physical/ Mechanical Control Chemical Cultural Biological 2

3 Types of Pests Weeds Diseases Insects Pest Development and Biology Insects complete or gradual metamorphosis 3

4 Pest Development and Biology Diseases understanding the disease triangle Environment Disease Pathogen Host Pest Development and Biology Weeds - annuals, biennials, perennials 4

5 Management Thresholds Aesthetic Action Economic Economic Threshold Figure credit: Ed Zaborski, University of Illinois. 5

6 Application of economic thresholds Predicted yield loss due to Gray Leaf Spot. Percentage ear leaf area affected by early dent stage 5% or less 6%-25 % 25%-75% 75%-dead leaf (Source: Pat Lipps, The Ohio State University) Approximate yield loss expected 0-2% loss 2-10% loss 5-20% loss 15-50% loss Application of economic thresholds Economic thresholds for bean leaf beetles in soybeans at the V1 stage. Management costs Crop Value $6 $8 $10 $12 Threshold number of beetles/plant $ $ $ $ Source: Tom Hunt University of Nebraska-Lincoln 6

7 Entomologist; and Robert J. Wright, Extension Entomologist This spreadsheet is designed to be used in the field on mobile devices, allowing the user to make management decisions immediately after scouting. Speed scouting is one method for determining whether soybean aphids have reached the treatment threshold of 250 aphids per plant. It relies on the number of "infested" plants rather than estimating the number of aphids on each plant. Plants are considered "infested" if there are 40 or more aphids on the plant. After inputting your field information, the spreadsheet will suggest the next step: "Resample in 7-10 days," "Sample 5 more plants," or "Treat, confirm in 3-4 days." EC 1582 Soybean Aphid Speed Scouting Spreadsheet Wayne J. Ohnesorg, Extension Educator; Thomas E. Hunt, Extension Speed scouting apps EC 1582 Soybean Aphid Speed Scouting Spreadsheet Wayne J. Ohnesorg, Extension Educator; Thomas E. Hunt, Extension Entomologist; and Robert J. Wright, Extension Entomologist This spreadsheet is designed to be used in the field on mobile devices, allowing the user to make management decisions immediately after scouting. Speed scouting is one method for determining whether soybean aphids have reached the treatment threshold of 250 aphids per plant. It relies on the number of "infested" plants rather than estimating the number of aphids on each plant. Plants are considered "infested" if there are 40 or more aphids on the plant. After inputting your field information, the spreadsheet will suggest the next step: "Resample in 7-10 days," "Sample 5 more plants," or "Treat, confirm in 3-4 days." Speed scouting apps available First generation European corn borer Second generation European corn borer Western bean cutworm Soybean aphid 7

8 Pesticide Resistance Development Application of a pesticide creates selection pressure, leading to survival of individuals that possess genes conferring resistance Percentage of population with resistance increases with selection over time Cost of Resistance Obsolete technology Increased pest pressure Increased cost of production for growers 8

9 Resistance Management Multiple modes of action Timing Crop rotation Accurate identification of pest More Information Check out UNL CropWatch Check PSEP (Pesticide Safety Education Program) for more information Contacts: Jenny Rees Ron Seymour Sarah Sivits Wayne Ohnesorg Megan Taylor 9