National Sunflower Association - link home
About NSA Join NSA Contact Us Facebook YouTube
All About Sunflower

Buyers

Health & Nutrition

Sunflower Seed and Kernel

Sunflower Oil

Growers

Banded SF Moth

Sunflower Moth

Video Clips

Blackbirds

Diseases

Insects

Banded Sunflower Moth

Cutworms

Headclipper Weevil

Longhorned Bettle

Midge

Palestriped Flea Beetle

Red and Gray Seed Weevils

Sunflower Beetle

Sunflower Bud Moth

Sunflower Moth

Sunflower Seed Maggot

Sunflower Stem Weevil

Thistle Caterpiller

Wire Worms

Insect Supplements

Weeds

Approved Chemicals

Planting

Growth Stages

Harvesting/Storage

Production Resource Books

Marketing

Yield Trials/Crop Survey

Crop Insurance

Equipment Buy/Sell

Calendar of Events

Media Center

Photo Gallery

Sunflower Statistics

International Marketing

Research

Meal/Wholeseed Feeding

Sunflower Magazine

Surveys

Espanol

Daily Market News
Sign Up for Newsletter
Online Catalog
Online Directory
Google Search
Printer Friendly Version
You Are Here Growers > Insects > Sunflower Beetle




Sunflower Beetle

Sunflower Bettle
The sunflower beetle zygogramma exclamationis feeds only on sunflower. The beetle can be confused with the Colorado potato beetle. The sunflower beetle is smaller, ¼ to ½ inch long, and characterized by three distinct dark stripes. The larvae have a unique 'humpbacked' appearance. This insect was problematic during much of the last two decades in the northern region but has been largely eliminated with insecticide seed treatments.

Sunflower Beetle larva
Life Cycle: There is one generation of the sunflower beetle. Adults overwinter and emerge in the spring and begin to feed. Eggs are laid on the sunflower stem and the underside of leaves.

Damage on leaf
Damage: The sunflower beetle is a defoliator. Defoliation of the entire early leaves can have a negative yield impact. Later feeding by the larvae can be severe leading to reduced yield and poor seed set. The damage to mature leaves creates a ‘lace-like' appearance. The sunflower plant can withstand a considerable amount of defoliation without a yield impact.

Economic Thresholds: Sunflower can tolerate more damage as the plant matures. One to two adults is the recommended threshold level in the seedling (2 to 6 leaf stage) or 10 to 15 larvae during the later stages or when 25% defoliation occurs in the upper leaves.

Scouting Method: The standard X pattern is recommended. Adults and/or larvae should be counted on 20 plants at five different sites within a field. Or plant defoliation should be considered using the same process.

Management: Sunflower beetle damage has been largely eliminated by insecticide seed treatments with Cruiser® and Idol®. Most insecticides labeled for sunflower insects include the sunflower beetle and are very effective.

Research: There is no additional research being conducted on the sunflower beetle.

Photos: Visit the Photo Gallery.

For further information, click on the link below. Another resource about Insects can be found in the Archive section of The Sunflower magazine.

Source: NDSU Extension Bulletin 25 Sunflower Production Handbook, NDSU Extension Service, September 2007 and the Sunflower Production Guide, Manitoba.



Additional Documents

NDSU Extension Bulletin 25 - Revised 9/2007 (document) File Size: 5461 kb

Download Adobe Acrobat Reader
NDSU Extension Bulletin 25 - Revised 9/2007



Top of the Page

copyright ©2014 National Sunflower Association