Wheat Insect Calendar

Bars represent the range of crop development stages during which insects may be present and/or crop damage may be expressed. Economic thresholds for management will vary by insect and crop stage.

Wheat Insects


  Feekes
 1
Emergence/
Seedling


Feekes
 2-3
Tillering
(Dormancy
 -Winter Wheat)
Feekes
 4-9
Stem
Elongation/
Jointing

Feekes
 10
In Boot



Feekes
 10.1-10.5
Heading/
Flowering

Feekes
 11.1-11.2
Milk/
Dough
Development

Feekes
 11.3-11.4
Ripening/
Maturity

Aphids
(Bird cherry-oat aphid, Corn leaf aphid, Greenbug, Russian wheat aphid, English grain aphid)
Grasshoppers
Hessian Fly
 
White Grubs
         
Pale Western Cutworm
(Northern and Central Plains)
         
Fall Armyworm
   
Armyworms, Fall Armyworm
 
Wireworms (spring wheat)
 
Cereal Leaf Beetle
 
       
Orange Wheat Blossom Midge
   
Wheat Stem Sawfly
(Northern, Central Plains, and Prairie Provinces of Canada)
 
       
Wheat Head Armyworm
IM Fall armyworm

Clemson University, USDA Cooperative Extension Slide Series, Bugwood.org.          

                                                     

IM Fall armyworm

Frank Peairs, Colorado State University, Bugwood.org.                                                     

IM White grub

Alton N. Sparks, Jr., University of Georgia, Bugwood.org. 

IM Cereal leaf beetle

 

 

IM Wheat stem sawfly larvae, note S-shape

Robert Peterson, Montana State University.                                                  

IM Greenbug

Frank Peairs, Colorado State University, Bugwood.org. 

IM Hessian fly

Scott Bauer, USDA Agricultural Research Service, Bugwood.org 

IM Bird cherry-oat aphid

Frank Peairs, Colorado State University, Bugwood.org. 

IM Pale western cutworm

Frank Peairs, Colorado State University, Bugwood.org. 

IM Russian wheat aphid

Frank Peairs, Colorado State University, Bugwood.org

IM Wheat head armyworm

Phil Glogoza, University of Minnesota.  

IM Wireworms

Frank Peairs, Colorado State University, Bugwood.org. 

IM Orange blossom wheat midge

Phil Glogoza, University of Minnesota. 

IM English grain aphid
 
Sources

Lee, C., Herbek, J. (editors), Bruening, W., et al. 2009. A comprehensive guide to wheat management in Kentucky. ID-125. University of Kentucky Extension. www2.ca.uky.edu

Foster, J.E. and Hein, G.L. 2009. Hessian fly on wheat. NebGuide G1923. University of Nebraska-Lincoln Extension

Paulsen, G.M. et al. 1997. Wheat production handbook. C-529. Kansas State University Extension.

McCornack, B.P., Zukoff, S., Whitworth, R.J., Michaud, J.P. and Schwarting, H.N. 2016. Wheat insect management 2016. MF745. Kansas State University Extension.

Reisig, D., Herbert Jr. D.A., Ambrose, G. and Weisz, R. 2013. Chapter 10. Insect pest management for small grains. Small grain production guide. North Carolina State University Extension.

Knodel, J., Shanower, T. and Beauzay, P. 2016. Integrated pest management of wheat stem sawfly in North Dakota. E1479. North Dakota State University Extension.Agronomy Guide for Field Crops: Chapter 13. Insects and pests of field crops. Pub 811. OMAFRA.

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