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University of Arizona
Cotton Pest Losses
Cooperative Extension

Revised 2/2010

Introduction and Background

1979-2008 Cotton Insect Losses Data (combined Bt and Non-Bt):
Sorted by Year HTML 221KB, Excel 134KB, PDF 107KB
Sorted by Insect HTML 206KB, Excel 146KB, PDF 64KB
Application per Acre Charts HTML, 5KB
Cost per Acre Charts HTML, 4KB

1999-2008 Non-Bt and Bt Cotton Insect Losses Data:
Non-Bt Cotton Data HTML 286KB, Excel 114KB, PDF 32KB
Bt Cotton Data HTML 257KB, Excel 78KB, PDF 34KB
Chart of Combined, Non-Bt & Bt Cotton Data HTML, 5KB
Contacts for more information

Introduction and Background

The Beltwide Cotton Insect Losses Survey has been supported by the National Cotton Council since 1979. This data is used to track state, regional and national trends in insect pressures and control measures. These trends are one tool that allow us to measure the impact of major programs (e.g., Boll Weevil Eradication programs) and new technologies (e.g., Bt cotton). These data are useful to policy-makers, bankers, marketing interests, insurers, regulators and researchers. These data are of particular importance to the development of regulatory policies to support special registrations, defense of pesticide products or uses, and to provide independent data to estimate pesticide/miticide use and insect-related losses.

Arizona Cotton Insect Losses Data
The data presented here reflect historical insect losses in Arizona cotton. These data are based on yearly estimates reported by state Extension entomologists, compiled by the Cotton Insect Loss Committee and presented at the annual Cotton Insect Research and Control Conference (, See References for original printed references). These estimates are derived from grower and PCA responses to a standardized survey, and/or expert opinion. Reporting methods and the information provided have been evolving since 1979 and in order to provide the most useful data, the data were made comparable through time. These data were standardized by:

  • combining some species,
  • reporting infested and treated acres as percentages,
  • calculating loss figures using historical lint prices provided by NASS (National Agricultural Statistics Service,,
  • adjusting Statewide Economic Loss figures (for yield and for control) to reflect bale production as reported by NASS,
  • obtaining cost per application data from University of Arizona County Crop Budgets from 1979-1985, and
  • deriving new data of interest.
  • For details.

Therefore, the data provided here are modified from the original and may differ from non-adjusted original sources. It should also be noted that Arizona has historically grown two species of cotton (Pima and Upland). The Cotton Insect Loss reports used to produce these tables did not always explicitly state which species were being reported. From a review of the data provided, we concluded that both Upland and Pima acres were included in all years except 1987, 1994, and 1996-present, when Upland acres only were reported. Starting in 1999, non-Bt and Bt cotton estimates were reported separately. They are combined in the overall data, but are also available in separate tables.

How Data Are Collected
Starting in 2003, with funding from the Western IPM Center, the Crop Insect Losses and Impact Assessment Working Group was formed to refine and improve the data collection process for cotton losses in Arizona, and to expand this process to collect comparable data for other crops in Arizona and in adjacent low desert regions of California.

Data are collected through a series of interactive clientele workshops. Participants include Pest Control Advisors (PCAs), growers, industry representatives and Extension professionals. We work hard to enlist the participation of representative PCAs from throughout the appropriate growing regions, and follow-up with mail surveys to those who cannot attend, to develop the most complete and accurate dataset possible. Currently, the group develops data on cotton, head lettuce and melons, and is developing a pilot instrument for alfalfa.

2007 CIL Questionnaire (PDF, 185KB)
Typical CIL Workshop Presentation (PDF, 1.33MB)
Instructions for Completing Questionnaire (part 1) (PDF, 11KB)
Instructions for Completing Questionnaire (part 2) (PDF, 220KB)

Ellsworth, P.C., A. Fournier and T.D. Smith. 2007 (rev. 9/08). Based on Ellsworth, P.C. and J.S. Jones. 2000. Arizona Cotton Insect Losses. Publ. No. AZ1183. University of Arizona, College of Agriculture and Life Sciences, Cooperative Extension, Tucson, Arizona. URL:

Questions regarding this data may be directed to:
Dr. Peter Ellsworth, IPM Specialist,
Theresa D. Smith, Program Coordinator,

Publication Information: This material went through a peer review publication process at the University of Arizona and was assigned the publication number AZ1183.

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