IPM: A risk management framework to improve decision-making
Table of Contents:
- Is IPM too risky?
- IPM, uncertainty and risk concepts
- Understanding client perceptions about risk of IPM
- Measuring the economic value and risk of IPM
IPM and the bottom line
- IPM and the bottom line: Sweet corn
- IPM and the bottom line: Cabbage
- IPM and the bottom line: Grapes
This question reflects a concern that I have heard from growers and crop consultants throughout my career, while working with many different agricultural commodities. As illustrated by the cover page, it is also a reasonable question given the uncertainty that many growers face each year, each day in agricultural production. As with all agricultural crops, there are many factors that influence the variability in pest pressure, final yields or produce quality. In my view, those in the agricultural business must contend with a diversity of uncertainties and risk that many other businesses often avoid.
Our answer to the risk question, as illustrated throughout this publication, is that Integrated Pest Management (IPM) should be viewed as a decision-making process that provides an excellent framework for increasing value, as well as reducing the uncertainty, associated with economic, environmental or health risks. In recent years, more work has been done to present the Value of IPM in terms that producers, consultants and those working in IPM policy can use to measure and improve the implementation of IPM programs. In this publication, sponsored by the USDA Risk Management Agency (RMA), we have highlighted several key concepts regarding Risk Management as it relates to IPM, and provide a case-study of the Risk Perceptions of a fresh-market grower audience in Minnesota. We have also summarized several case-studies illustrating the Value of IPM by comparing the economic returns and reduced risk (variability) in economic returns for selected high-value horticultural crops.
Although the IPM examples summarized in this publication focus on insect pests of horticultural crops, many of the risk management principles apply to other pests, field crops, and other systems as well. Similar studies are underway to illustrate the benefits of IPM for reducing environmental risks, but the purpose of this publication is limited to the benefits of reducing economic risk. In terms of economic risk, one of the goals of IPM is to reduce the variability in net returns, and when possible, increases the expected value of net returns (or profit). We believe that the IPM case studies summarized here, entitled “IPM and the bottom line,” provide examples that you, or producers and crop consultants in your region may find useful.
I hope that you agree, and that you will find this publication useful for enhancing the value of IPM for your business, or to share as an educational tool with growers and crop consultant’s in your region.
William D. (Bill) Hutchison
Professor & Extension Entomologist
Department of Entomology
University of Minnesota
Early development and use of Integrated Pest Management (IPM) concepts and programs has been attributed to several entomologists and scientists working in the U.S., Australia, and other countries, dating at least to the 1950’s. Among the many scientists involved with promoting the IPM concept in the U.S., Dr. Ray Smith, with the University of California, clearly played a significant role and is often referred to as the “Father of IPM.” Since the 1950’s, over 75 definitions for IPM have been proposed. For the purposes of this publication, we have elected to use a definition recently developed by the USDA, as part of the USDA’s “IPM Roadmap.” This definition reflects considerable input by growers and IPM stakeholders throughout the U.S., and explicitly reflects the decision- making and risk management features of IPM. We also clarify the differences between uncertainty, risk, and decision-making.
Integrated Pest Management:
“IPM is a longstanding, science-based, decision-making process that identifies and reduces risks from pests and pest management related strategies.” In addition, “...it [ipm] coordinates the use of pest biology, environmental information, and available technology to prevent unacceptable levels of pest damage by the most economical means, while posing the least possible risk to people, property, resources, and the environment. IPM provides an effective strategy for managing pests in all arenas from developed residential and public areas to wild lands. IPM serves as an umbrella to provide an effective, all encompassing, low-risk approach to protect resources and people from pests.” (IPM Roadmap, May 17, 2004)
The possibility of outcomes that are difficult to quantify for predictive purposes (e.g., yield loss from a new invasive pest, or the effect of an agbioterrorism attack on crop prices).
Uncertainty that can be estimated by measuring key outcomes over time, and summarizing the data as a probability distribution (e.g., profit/net returns from crop production, timing or intensity of weather events, commodity prices).
Set of all possible outcomes and their probabilities (e.g., the net revenue probability distribution defines the complete range of all possible net revenue outcomes and the probability that each will occur).
Beliefs or perceptions concerning the probability distribution of a desired outcome (e.g., profit/net returns from crop production, reduced nitrate leaching).
Given a known set of outcomes and their probabilities (based on information [data] or previous experience), how one responds to this risk. Different methods exist to classify and measure an individual’s risk perceptions and attitudes, but people are typically characterized as Risk takers, risk averse or risk neutral. Given the choice between a certain outcome and risky outcome with an average (mean) of the same value, a risk taker would choose the risky outcome to have the chance to earn more than expected; the risk averse person would choose the certain outcome to avoid the risk of earning less than expected; and the risk neutral person would be indifferent between the certain and risky outcomes.
Decision-making & Management:
The process of selecting the best choice to achieve goals using available resources (people, goods, services) within pertinent constraints, given the available data [distributions], risk perceptions, and risk preferences of the individual. In the context of IPM, goals often include economic, environmental, health, and societal improvement. Constraints often include time, regulatory factors, and finances.
Minnesota Case Study: Fruit and Vegetable Growers
- Few IPM programs evaluate grower or client risk perceptions.
- Many studies assume growers are risk averse in most situations.
- In February, 2005, Minnesota growers, attending an educational conference, completed a written survey to assess their risk preferences.
- Growers were asked to review a definition of IPM prior to answering questions.
- Study resulted in 32 usable surveys.
- Results were summarized within the context of applied economics, using the methods of Patrick (1992) and Hardaker et al. (2004).
Bacic, I. L. Z., A.K. Bregt and D. G. Rositer. (2006). A participatory approach for integrating risk assessment into rural decision-making: A case study in Santa Catarina, Brazil. Agric. Systems 87:229-244.
Hardaker, J. B., R. B. M. Huirne, J.R. Anderson and G. Lien. (2004). Coping with Risk in Agriculture. 2nd Edition. Cambridge, MA.
Patrick, G. (1992). Managing risk in agriculture. NCR-406, Coop. Ext. Serv., Purdue University, W. Lafayette, IN.
Vegetables (1,185 acres)
- Education: BS/BA/MS degrees (59%)
- Average Age (52 years)
- Average Farming Experience (19.7 years)
- Average Farm Size (79 acres)
- Use some form of crop insurance (47%)
Fruits (470 acres)
- Use some form of IPM (94%)
- Very satisfied, or satisfied with current IPM program (72%)
- Interest in trying new IPM practices (95%)
- Still lack confidence in using IPM (56%)
- Willing to hire a crop consultant, to assist with IPM (29%)
In this study, risk preferences fluctuated, depending on whether a grower perceived the risk as a potential gain or potential loss. Clearly, more research is necessary to better understand the risk preferences of IPM audiences. Including this information in the design of IPM programs should be useful for understanding the degree to which IPM is implemented, suggest new priorities for research, or for developing new methods of communicating the value of IPM.
Whether you are considering a new crop, or a new investment opportunity, it is always useful to evaluate past performance. Although past performance is no guarantee of future returns, data from previous field trial research is invaluable for assessing the potential impact on a farm enterprise. In addition to the enclosed case study, “IPM and the bottom line—Cabbage,” we summarized the results of the 4-year Minnesota study showing the Increased Value (Net returns) and Reduced Risk (Standard Deviation, SD) for IPM. IPM results, compared with a conventional grower program (minimal pest scouting) are presented for each year (Fig. 1), as Cumulative Total Net Returns (Fig. 2) and Cumulative Total Risk (Fig. 3).
The IPM program relied on frequent pest monitoring (1-2 times/wk), the use of “reduced- risk” insecticides to conserve beneficial insects, and timely applications when needed (see also “IPM and the bottom line—Cabbage,”) to provide more consistent economic returns. Although economic returns for IPM may be lower in any specific year (e.g., 2000), return for this year, and over the 4 years was much greater than that of the Conventional system (Figs. 1-2). Of equal importance, the risk of economic returns (variability measured by the standard deviation) was also much less for IPM vs. the Conventional grower system (Fig. 3).
The following IPM case studies, subtitled “IPM and the bottom line,” provide additional ways of measuring and communicating the economic value and risk of IPM for several horticultural crops.
Fig. 1. Average net returns for Cabbage IPM and Conventional Grower program, showing increased returns each year for IPM, with a significant grower program loss in 2000.
Fig. 2. Average cumulative total net returns, over 4-year period, for Cabbage IPM and Conventional Grower program, showing the benefit of investing in an IPM approach over time.
Fig. 3. Average cumulative risk (standard deviation) of net returns, over 4-year period, for Cabbage IPM and Conventional Grower program, showing cumulative risk of IPM is only about 1/2 of the Conventional grower program.