Hawaiʻi Chemigation Guide

January 2013

A study guide for persons seeking certification by the State of Hawaiʻi Department of Agriculture to buy, use, or supervise the use of fumigants classified as restricted use pesticides.

This study guide was developed for the Pesticide Risk Reduction Education program, a program of the College of Tropical Agriculture and Human Resources, University of Hawaii at Mānoa. Please direct any question or comment about this guide to:

Charles Nagamine
Department of Plant and Environmental Protection Sciences
3190 Maile Way Room 307
Honolulu, HI 96822
Telephone: (808) 956-6007 Email: cynagami.hawaii.ed

DEVELOPMENT OF THIS GUIDE WAS SUPPORTED IN PART BY THE STATE OF HAWAIʻI DEPARTMENT OF AGRICULTURE.

Acknowledgments

This study guide is mainly a reproduction of Virginia Tech’s study guide, Guide for Pesticide Chemigators in Virginia (2003). Virgina Tech’s study guide was adapted for Hawaii by changing the title and table of contents, deleting two appendices, and editing text about laws and regulations and other topics. Illustrations were provided by the production staff of Virginia Tech’s study guide.

We gratefully acknowledge effort of several of the staff at Hawaii Department of Health’s Safe Drinking Water Branch. They reviewed and provided comments about Virginia Tech’s study guide.

Where trade names are used, no endorsement is intended, nor criticism implied of similar products not named.

Table of Contents

Unit 1. Introduction

  • Learning Objectives
  • Terms to Know
  • Overview of Chemigation
  • Scope of This Manual
  • Purpose of This Manual
  • History of Chemigation
  • Laws and Regulations
  • Integrated Pest Management (IPM)

Unit 2. Before You Chemigate

  • Learning Objectives
  • Terms to Know
  • Why Chemigate?
  • Considerations before Chemigating
  • Operation Plan
  • Target Applications

Unit 3. Safety Considerations

  • Learning Objectives
  • Terms to Know
  • Protecting the Environment
  • Protecting Workers: The Worker Protection Standard
  • Protecting the Applicator

Unit 4. Application Systems and Equipment

  • Learning Objectives
  • Terms to Know
  • Sprinkler Systems
  • Drip/Trickle (Microirrigation) Systems
  • Surface/Gravity-FlowSystems
  • Chemigation Equipment
  • Management Principles

Unit 5. Backflow Prevention

  • Learning Objectives
  • Terms to Know
  • Backflow
  • Source Water and the Law
  • Schematic of a pesticide injection system with the eight required items*
  • Backflow Prevention Systems
  • Backflow Safety Equipment
  • Alternative Safety Designs

Unit 6 Calibration

  • Learning Objectives
  • Terms to Know
  • Calibration Basics
  • Calibrating a Center Pivot System
  • Calibrating a Stationary Sprinkler System
  • Calibrating a Drip/Trickle System
  • Test Your Knowledge

Appendix A. Conversions Factors

Appendix D. List of Alternative Chemigation Safety Equipment

PRINT VERSION of webpage.

QUESTIONS OR PROBLEMS WITH THIS WEBPAGE? This on-line version is made and maintained in our office at the University of Hawaii's Manoa campus located in Honolulu, Hawaii. To comment, make suggestions, ask questions, or report any problems with this website, please contact Charles Nagamine, EMAIL: cynagami@hawaii.edu, TELEPHONE: (808) 956-6007, MAIL: P.E.P.S. Dept., 3190 Maile Way Room 307, Honolulu, Hawaii 96822.