Albert Lea Seed House Oat Production Guide | Page 38
Return to preceding couplet (12’).
nubs
no nubs
Figure 13.1.
Figure 13.2.
13
13’
Conspicuous tooth on front
corners of pronotum. Antennae
with distinct club. Combination often
referred to as ‘nubs and clubs’.
Foreign grain beetle – Ahasverus
advena
Return to preceding
couplet (13’).
No conspicuous tooth (or nub) on
front corners of pronotum.
Go to couplet 14
Figure 14.1.
Figure 14.2.
14
14’
Red flour beetle
Tribolium castaneum
Gap between eye differences:
Gap narrow or wide.
View comparison here
38
Antennal club differences:
Club distinctly or gradually
enlarged.
View comparison here
Confused flour beetle
Tribolium confusum
Lateral eye width differences:
Eye more than four or only two
facets wide at narrowest point.
View comparison here