Date: To: AgEnto@listserv.montana.edu Subject: armyworms in barley From: Sue Blodgett------_=_NextPart_001_01C3418C.EC8BFD10 Content-Type: text/plain Enclosed is a heads up on armyworm in barley provided by Phil Glogoza, NDSU With these storm fronts moving through the region, we start to get concerned about the movement of armyworm moths to our crops from the south. The NDSU diagnostic lab just received a sample of barley where there was some tunneling/cutting at the soil line. It appears this damage may be related to armyworm feeding. Barley is often one of the preferred crops armyworms infest (the lodging and high humidity in the canopy are attractive to moths to come and lay eggs). So it is time to see if any amyworm have made their way into fields. If using sweep nets to sample for grasshoppers in small grains, you might find some armyworm. However, using a sweep net during the day to sample armyworms is likely to underestimate numbers. Some field inspection for the presence of armyworm would be recommended. If feeding damage is found in the foliage and no other responsible insects pest can be found, scout for armyworms by parting foliage on the plant and inspecting the plant and the soil below for small fecal pellets. If pellets are found then look for larvae under plant trash, soil clods, or in soil cracks. If 4 to 5 worms or more are found per sq. foot, treatment is recommended. Because populations are higher in lodged areas, be sure to average the population over the entire field. Sue Blodgett, Assoc Prof Dept Entomology, L. Johnson Hall Montana State University Bozeman, MT 59717 Phone: (406) 994-2402 Fax: (406) 994-6029 blodgett@montana.edu ------_=_NextPart_001_01C3418C.EC8BFD10 Content-Type: text/html ------_=_NextPart_001_01C3418C.EC8BFD10--Enclosed is a heads up on armyworm in barley provided by Phil Glogoza, NDSU
With these storm fronts moving through the region, we start to get
concerned about the movement of armyworm moths to our crops from
the south.
The NDSU diagnostic lab just received a sample of barley where there
was some tunneling/cutting at the soil line. It appears this damage may
be related to armyworm feeding. Barley is often one of the preferred
crops armyworms infest (the lodging and high humidity in the canopy
are attractive to moths to come and lay eggs).
So it is time to see if any amyworm have made their way into fields.
If using sweep nets to sample for grasshoppers in small grains, you
might find some armyworm. However, using a sweep net during the
day to sample armyworms is likely to underestimate numbers.
Some field inspection for the presence of armyworm would be
recommended. If feeding damage is found in the foliage and no other
responsible insects pest can be found, scout for armyworms by parting
foliage on the plant and inspecting the plant and the soil below for small
fecal pellets. If pellets are found then look for larvae under plant trash,
soil clods, or in soil cracks. If 4 to 5 worms or more are found per sq.
foot, treatment is recommended. Because populations are higher in
lodged areas, be sure to average the population over the entire field.
Sue Blodgett, Assoc Prof
Dept Entomology, L. Johnson Hall
Montana State University
Bozeman, MT 59717
Phone: (406) 994-2402 Fax: (406) 994-6029
blodgett@montana.edu