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Posters

These posters detailing weed seed, crop species and disease body identification were created for various educational events, and are now available for ISMA members. To view a particular poster, select the link below, arranged alphabetically.

Please note that these posters are copyrighted material and are to be used only for educational/ non-commercial purposes. Other uses without permission are prohibited.

Family

Poster Link

Description

Authors

Amaranthaceae

Categorizes and describes seed features that can be used for examination of amaranth or pigweed (Amaranthus spp.) seed impurities.

J. Neudorf, R. Wang, A. Salzl and T. Meyer

Credit: 2019 Canadian Food Inspection Agency

Asteraceae

Describes features of the achenes of four species of knapweed and star thistle (Centaurea spp.) that are regulated in Canada, including similar looking species.

J. Neudorf, J. Hinke and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Brassicaceae

Details and compares seed features of small seeded weedy species in the mustard family (Brassicaceae).

J. Neudorf and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Convolvulaceae

Illustrates the external and internal features of dodder (Cuscuta spp.) seeds, along with dodder fruit and immature seeds.

J. Neudorf and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Ergot and Sclerotia

An introduction to the identifying features of ergot disease bodies and sclerotia for the purity analyst.

Credit: 2021 Canadian Food Inspection Agency

Fabaceae

Compares and contrasts the identifying features of 3 crop kinds in the clover family (Fabaceae).

J. Neudorf and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Poaceae

Details the features used to distinguish wild oat (Avena sativa) and false wild oat (Avena sativa mut. fatuoid) florets.

J. Neudorf and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Poaceae

Describes and compares the floret features of four species of brome (Bromus spp.) that are regulated in Canada.

J. Neudorf, A. Salzl and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Poaceae

Summarizes the distinguishing features of the similar looking florets of western wheatgrass (Pascopyrum smithii) and couchgrass (Elymus repens).

J. Neudorf, S. Putz and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Poaceae

Describes and compares the spikelet features used to distinguish four species of foxtail (Setaria spp.) that may be encountered as seed impurities.

J. Neudorf and R. Wang

Credit: 2019 Canadian Food Inspection Agency

Poaceae

Describes the taxonomy, nomenclature and history of domesticated sorghum, hybrids, wild species and weed species (Sorghum spp.).

Visual identification of small oilseeds and weed seed contaminants

Black and white drawings. A tool for assisting grain inspectors in seed identification related to grain grading of small oilseeds crops. Text by Karen Bell. Illustrations by Norma Vidal. Edited by Steve Symons.

Previously published as: Handbook on Varietal Identification by Kernel Characters of Barley, Wheat and Small Oilseeds; Part III. by C.H. Owen and M.M. Ainslie: Minister of Agriculture, Canadian Grain Commission; Ottawa, Canada; 1971.

Users should be aware that weed seeds discussed in the bulletin represent a very small number of species of weed seeds that could potentially occur in oilseeds crops. The weed seeds discussed in this bulletin were selected based on being problematic in grain cleaning, end product quality or similarities in visual seed identification to oilseeds crops or other weed seeds of concern.