Southeast Michigan vegetable regional report – September 7, 2016

Some harvests end while others begin.

Weather

The table below presents rainfall (in inches) for the Michigan State University Enviro-weather stations in southeast Michigan. Degree-day is base 50 degrees Fahrenheit since March 1 for 2016 and the average degree-day accumulation at this point in the growing season in past years.

Rainfall and degree-day totals as of Sept. 7, 2016

Weather station

Rainfall (in.) last week

Rainfall (in.) since April 1

Degree-days

5-year average

Commerce

0

13.65

2,467

2,268.9

Blissfield

0

14.48

2,729

N/A

Hudson

0.25

10.56

2,552

2,403.2

Petersburg

0.13

12.04

2,557

2,442.4

Crops

Sweet corn harvest is wrapping up on many farms, as heat pushed production forward. Cover crops have gone in after production has wrapped up in some fields.

Cucurbit crops continue to be at risk for downy mildew and powdery mildew. Looking at reports coming out of Ohio, downy mildew is widespread in cucumbers and melons in northern Ohio, and this last week saw a report of downy mildew in pumpkins in southern Ohio. Michigan State University Extension recommends keeping an eye on your plantings, especially if you are targeting later markets. For pictures of symptomatic foliage, see “Downy Mildew Symptoms on Cucumber” by MSU. Pumpkin harvest has begun for sale purposes as well as getting them out of the sun.

The wet conditions in the last two weeks have led to instances of fruit rot in peppers. Anthracnose has appeared in some fields. Many peppers have suffered sunscald this year, which can make the fruit susceptible to secondary infections.

For potatoes and tomatoes, the Michigan Late Blight Risk Forecasting predicts high risk of late blight over the next four to five days in our area.

If you have any plants you believe may have a disease, please contact me at .(JavaScript must be enabled to view this email address) or 517-264-5309 to schedule a pickup, or send the affected plant parts to MSU Diagnostic Services.

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