Winter wheat update – July 1, 2013

In its grain-fill period, wheat is facing leaf disease and lodging pressure.

A summary of the July 1 Michigan Wheat Watchers report is provided in the table below. In general, the group feels the crop does not measure-up to last season. However, moisture levels are adequate in many areas, and the relatively cool temperatures as of late should help sustain the grain-fill period. This will translate into a few extra bushels of yield, particularly where fungicides and adequate fertilizer nitrogen help to further slow the ripening process.

According to Michigan State University Extension, there are no reports of serious armyworm infestations, unlike the past few years. Fusarium head scab can be found in many fields, but at relatively low levels. Nonetheless, it would not be surprising if testing at harvest uncovers a few cases of high DON levels.

Leaf diseases were unusually scarce until the past few weeks. Currently, the disease of the year goes to Septoria leaf spot. Albeit at low levels, it was the one disease that hung around during April and May. In recent weeks, it has advanced to the flag leaf in untreated fields. Leaf rust, along with stripe rust, can now be found as well.

Plant lodging is a concern. Despite being behind in development this season, wheat has attained normal height. However, because of its rapid growth, the stem strength may not be adequate in all cases. Severe storms have added to the lodging concerns of growers.

Michigan wheat watchers report for July 1, 2013

County

Watcher

Growth stage

Yield est. compared to 2012 (bu/A)

Leaf spot diseases

Rust diseases

Comments

Allegan

Tom Smith, Moline Co-op

Milk

-5

 

Stripe rust

Some head scab even though it was sprayed; what looked early on as a great crop, not as good as previously thought.

Cass

Carl Sparks, Sparks Cedarlee Farms

Soft dough

-3

 

 

Head scab scattered and glume blotch.

Gratiot (southern)

Phil Tuggle, MI Ag Comm.

Soft dough

-20

 

 

Non-fungicide sprayed is a wreck. Head scab is showing up as well on wheat without fungicide at heading.

Huron

Tim Wilke, Co-op Elev. Co.

Early-mid-milk

-4

Septoria

 

No significant armyworm pressure, some lodging occurring. Some light scab being found.

Ingham

Steve Wagner, AgriBus consult.

Early dough

-5

Septoria, low

None

Recent storms have knocked down wheat up to 5%.

Isabella

Paul Gross, MSU Extension

Med milk

-8

Septoria

Light stripe rust

Cool temperatures making for good conditions for grain fill. Kernel count and size should be good. Some down wheat from high wind and rain last week.

Jackson

George Wilcox, Crop Prod Services

Soft dough

-7

Low pressure

Low pressure

Concern now with excess rain, lodging wheat in most fields. More rain in the forecast. Harvest will be later that expected, grain quality a question.

Jackson

Brandon Hotchkin

Early dough

 -5 to 10

Powdery mildew

 

 

Lenawee

Scott Wahl

Early dough

 -5

Septoria

Stripe rust

Fields are drying down. Disease pressure has been low until this point. Overall yield will be slightly less than last year, but overall quality looks to be in the fair to good range.

Montcalm

Fred Springborn, MSU Extension

Dough

+/- 20%

Septoria, not severe but present

Light rust

Difficult to assess yield potential. I expect irrigated wheat to be down slightly, but dry land to be up. Some fields are lodging.

Newaygo

Mitchell Murray, MI Ag Commodities

Late milk

-5

Leaf spot

None

Crop has evened out in color to the normal dark green that we like to see. Fusarium head blight is showing up in some fields.

Presque Isle

James DeDecker, MSU Extension

Watery to mid-milk

-5

Septoria, mild powdery mildew;

 

A few late fungicide applications went on in the last two weeks. No real color change yet. Parasitized aphid “mummies” showing up on heads; bacterial mosaic found.

Saginaw

Bill Guilford, Guilford-Beagle Farm

Early dough

-10

Septoria

Leaf rust

The return of a more normal, later harvest date.

Saginaw Midland

Dennis Varner, Harvey’s Ag Solutions

Late milk

-20

 

Leaf rust

No disease where Prosaro sprayed; a little rust in unsprayed field.

Sanilac

Martin Nagelkirk, MSU Extension

Milk

-5

Septoria

None

Very heavy Septoria leaf spot. Significant lodging in some fields following storms. No armyworm outbreaks reported. Have about one scabby head per square yard in trial.

Sanilac

Kyle McCarty, MAEAP Tech

Early to late milk

-4

Septoria, powdery mildew

Leaf rust

Some lodging in southeast Sanilac area (2-5%). Leaf spot severe in some fields.

St. Clair

Mark Naplin, Eastern Michigan

Late milk/ early dough

+/-5

Septoria, powdery mildew

None observed

Crop looks good. Storms that came through in the last two weeks knocked some wheat down. Bleached heads are showing up in some fields.

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