A “close-up” Look at Some Diseases of 2013: By Stephen Franke

July 10th, 2013
A microscopic view of the asexual reproductive structures of alfalfa downy mildew. (found near Oneida)

A microscopic view of the asexual reproductive structures of alfalfa downy mildew. (found near Oneida)

A single asexual "spore" (sporangium) of the alfalfa downy mildew pathogen, Peronospora.

A single asexual “spore” (sporangium) of the alfalfa downy mildew pathogen, Peronospora.

A dissecting scope view of powdery mildew on wheat (Blumeria graminis). Note the spherical fruiting structures (chasmothecia). (Found near Freedom, WI)

A dissecting scope view of powdery mildew on wheat (Blumeria graminis). Note the spherical fruiting structures (chasmothecia). (Found near Freedom, WI)

A close-up image of the powdery mildew chasmothecia. Inside they contain the sexual spores (ascospores) for reproduction.

A close-up image of the powdery mildew chasmothecia. Inside they contain the sexual spores (ascospores) for reproduction.

Blumeria graminis chasmothecia

Blumeria graminis chasmothecia

Blumeria graminis asci and ascospores from a ruptured chasmothecium.

Blumeria graminis asci and ascospores from a ruptured chasmothecium.

Stemphillium leaf spot of alfalfa (Stemphillium spp.) Pictured are the sexual spores (ascospores) contained in their sacs (asci). (Found near Bonduel, WI)

Stemphillium leaf spot of alfalfa (Stemphillium spp.) Pictured are the sexual spores (ascospores) contained in their sacs (asci). (Found near Bonduel, WI)

A close up image of the asexual spores (conidia) of Stemphillium leaf spot of alfalfa.

A close up image of the asexual spores (conidia) of Stemphillium leaf spot of alfalfa.

A uredinial pustule from wheat leaf rust (Puccinia spp.) viewed under the dissecting scope. (Found near Freedom, WI)

A uredinial pustule from wheat leaf rust (Puccinia spp.) viewed under the dissecting scope. (Found near Freedom, WI)

A close up of two uredinio spores from the wheat rust pustules. Note their orange tint which gives rust diseases their characteristic "rust orange".

A close up of two uredinio spores from the wheat rust pustules. Note their orange tint which gives rust diseases their characteristic “rust orange”.

A look under the dissecting scope at Septoria leaf spot of wheat (Septoria tritici). The black spots are asexual fruiting bodies(pycnidia). (Found near Freedom, WI).

A look under the dissecting scope at Septoria leaf spot of wheat (Septoria tritici). The black spots are asexual fruiting bodies (pycnidia). (Found near Freedom, WI).

A ruptured pycnidium with conidia from Septoria tritici.

A ruptured pycnidium with conidia from Septoria tritici.

A view of Septoria tritici conidia.

A view of Septoria tritici conidia.

Soybean downy mildew hyphae on the underside of a leaf (Peronospora manshurica). (Found near Pulaski, WI)

Soybean downy mildew hyphae on the underside of a leaf (Peronospora manshurica). (Found near Pulaski, WI)

Sporangia and sporangiophores from Peronospora manshurica.

Sporangia and sporangiophores from Peronospora manshurica.

White Mold Control While Applying Glyphosate at V1-V2 Stage in Soybeans

June 23rd, 2013
SoyPicV1
I had a great question from a great grower about this season and with the weather conditions that we have been having.  Wet and cooler.  These conditions and having a field with previous white mold problem on that field can increase the potential for having white mold.
Products that will suppress white mold I did not find any products that will ‘control’:
Lactofen Herbicide (Cobra and Phoenix): Timing 2 trifoliate to 45 days preharvest.  Will burn the soybeans, spray and go fishing, do not look at the beans for 1 week.  Will also help control some broadleaf weeds.  To suppress white mold you would need to apply this close to when white mold starts which would be the R stages (beginning bloom).
Fungicides: Endura, Aproach, Topsin, Domark: Prior to disease development and continue on a 7-14 day interval.
Biological control: Contans WG this has to be soil applied in fall after harvest or spring before planting.
So to answer the question about throwing in something for White Mold while applying glyphosate at V1-V2 stage will probably not work.  You need to wait until the R stages to suppress white mold so at the V1-V2 stages just spray the glyphosate.

Visit our booth at WPS Farm Show

March 26th, 2013

EAA Grounds - Oshkosh, Wisconsin
March 26, 27 and 28, 2013
9 a.m. to 4 p.m. Tuesday and Wednesday
9 a.m. to 3 p.m. Thursday

Our Booth Location: C5631

Enter to win a $200 Fleet Farm Gift Card!

See you there!

Powdery Mildew

April 26th, 2012

Powdery mildew was observed in a 12-14″ tall winter wheat field today.  Very dense canopy most likely contributing to the infection.

DBA Annual Symposium

February 10th, 2012

Come check out our booth at the 7th Annual DBA Expansion Symposium

KI Convention Center
February 21-22

LCD day.

September 22nd, 2011

Spent time on a farm with fifth graders, educating them about food production.

Wind Damage Corn

September 22nd, 2011

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Check corn for wind damage and prioritize harvest accordingly.

Wind damage.

September 22nd, 2011

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Wind damage caused by storms that moved thru Appleton.

Corn silage dry downs

September 22nd, 2011

Doing corn silage dry downs this week, the rain we had over the weekend has really kept the corn wet.

Final Nitrogen Check

July 11th, 2011

With all the moisture this spring and early summer its a good time to do a final nitrogen check in corn.  This can be done visually or using soil and tissue tests.  Many soil nitrate tests have been coming back low in nitrogen, but the tissue tests are in sufficient range.  If plant is getting enough nitrogen no need to add more continue to monitor and apply as needed.