Diseases on corn and soybeans in Kansas

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

Corn Diseases

The 2012 growing season was unusually hot and dry for Kansas corn growers, so much so that even irrigated corn was affected. Gray leaf spot, the most common foliar disease in most years, was almost nonexistent in 2012. Only a few irrigated fields and possibly some dryland fields that caught some timely rains were even considered for fungicide applications.

Goss’s bacterial wilt, while less common than in 2011, was still severe in some fields that received hail damage early in the season. Goss’s wilt is typically more severe in fields that are in continuous, no-till corn and that have received injury due to hail or sandblasting. The disease has spread rapidly across the Corn Belt in recent years and scientists are trying to determine the reasons for the rapid increase.

Aspergillus ear rot, the producer of aflatoxin, was as severe as or possibly even a little worse than in 2011. Fields with significant levels of Aspergillus were found as far northwest as Rooks County, an area that rarely has to deal with aflatoxin problems. Fortunately, aflatoxin amounts were generally at levels where the elevators would accept the grain without penalty, but some loads were docked for excessive levels, and a few loads were simply rejected. Because of the dry conditions, charcoal rot was also prevalent in many non-irrigated fields.

On a positive note, because of the drought in Texas and Oklahoma, southern rust was again at very low levels. That, combined with the early maturity of the crop, greatly reduced the threat of yield loss from the disease. The only other disease of concern was common smut. Poor pollination leaves ears more susceptible to this disease and the high heat at pollination resulted in many fields with poorly filled ears and increased levels of common smut.

Soybean Diseases

The hot dry conditions also reduced the incidence of soybean diseases in 2012. Common foliar diseases such as brown spot and frogeye leaf spot were absent from most fields. The hot, dry weather proved to be highly favorable for the development of charcoal rot, bringing statewide losses to even higher levels than 2011. 

One interesting development in 2012 was that in an effort to keep up with water demand, some fields were actually overwatered and sudden death syndrome (SDS) developed at levels higher than expected. Overall however, levels of SDS were well below average. 

A statewide survey for soybean cyst nematode (SCN) was completed in 2012. Approximately 20% of Kansas soybean fields were found to be infected. The majority of these fields have SCN levels in the range where only low to moderate losses are likely occurring. In some counties, such as Cherokee County in southeast Kansas, however, the percentage of fields infested was approaching 100% -- with a few having nematode levels that are likely causing significant yield loss.

Other diseases identified in 2012 include bean pod mottle virus, stem canker, bacterial blight, and iron deficiency chlorosis.


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


Aluminum Grain Trailers

Maurer Manufacturing offers a complete line of high quality aluminum grain trailers. Manufactured in Spencer, Iowa, Maurer aluminum grain trailers ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form