This section contains archived content made available for reference, research, or record keeping purposes. These materials are not actively maintained and may not meet current accessibility standards. All links have been removed. Visit our current website for updated pages.

UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

Cotton > Year-Round IPM Program > Early Squaring > Leaf Ring Sampling for Whitefly Nymphs

  Printer-friendly version

Cotton

Leaf Ring Sampling for Whitefly Nymphs

For whitefly nymphs, only part of the leaf must be sampled. Use a leaf ring to isolate an area the size of a quarter between the central and left-side main veins as shown below. For a leaf ring you can use a cap thread gasket (dimensions: 1-1/8 in. O.D. x 31/32 in. I.D. x 1/16 in. H) found at the plumbing department of your local hardware store. For convenience, keep this with your hand lens.

Score the leaf as infested if any large nymphs (3rd and 4th instars) are present within the leaf ring.

Figure

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Acknowledgements Staff-only pages Subscribe (RSS) Contact UC IPM

Agriculture and Natural Resources, University of California

© 2016 Regents of the University of California Division of Agriculture and Natural Resources Nondiscrimination Statement

Accessibility   /PMG/C114/m114sclfdskwfly.html?srcPage=PMG%2FC114%2Fm114sclfdskwfly.html revised: June 24, 2016. Contact webmaster.