Corn flea beetle and Stewart's leaf blight prediction

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

Being early March, it is time to put out the annual corn flea beetle and Stewart’s leaf blight prediction based on the average temperatures the past three months (Dec, Jan, and Feb.).  Stewart's bacterial disease is dependent on the level of bacteria-carrying flea beetle survival over the winter. Because higher populations of the flea beetle survive during mild winters  than during cold winters, winter temperatures have been used to predict the risk of Stewart's disease. Compared to recent years, and even the past few decades, the past three months have definitely been on the cold side. 

The 'flea beetle index' is calculated as the sum of the average temperatures of December, January and February. This winter we find that all areas of the state have indexes less than 90 suggesting that the risk for the insect and the disease is negligible. Only the two most southern locations (Piketon and Jackson) even reach an index over 80, coming in at 84.8 and 88.7, respectively. The other  locations and the corresponding indexes are: Wooster (OARDC) 73.8, Ashtabula 67.5, Hoytville (Northwest Research Station) 63.2, and South Charleston (Western Research Station) 74.1. Obviously, this was a very cold winter!

As always, we would recommend that growers still scout for flea beetles, especially if they have planted a hybrid that is susceptible to Stewart's disease. It is always better to be on the cautious side. However, the realization is that most field corn planted these days, especially all transgenic hybrids, already come with an insecticide seed treatment applied. Thus, it is mostly non-transgenic corn that might need to be considered and watched more closely. Also, field corn hybrids tend to be more resistant to wilt than sweet corn. Sweet corn varieties are much more susceptible to wilt in the first leaf stage. A few are resistant by the second leaf stage and many are resistant in the third and fourth leaf stage. Consult your seed supplier for information on resistant varieties and hybrids.


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


Convyers

Meridian’s conveyors deliver seed with unmatched versatility. Meridian’s transport conveyors are manufactured with heavy-duty, fully enclosed construction. Meridian’s cross cleated ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form