Four reasons not to mix an insecticide with nitrogen

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

Recent research from North Carolina has suggested that there are times where tank mixing an insecticide with your nitrogen can be cheaper than using scouting and thresholds for cereal leaf beetle. The biggest reason for this is because there is a yield penalty for driving over wheat after jointing and because scouting costs money. However, there are a number of reasons why I do not recommend this for 2014.

1. When wheat is $6 per bushel, you can save on average $2 an acre using the tank mix approach. However, when wheat is $4 a bushel, you lose $2 an acre using the tank mix approach. This includes the cost of paying a scout, as well as the yield penatly incurred from drive down over the wheat. You can save even more money by doing the scouting yourself (a simple trip to the field in mid-April is better than nothing!) or by applying by airplane if needed (something you may want to do anyway if it continues to remain wet).

2. Cereal leaf beetle tend to be worse in thin stands. Contrary to common opinion, this is not because cereal leaf beetle prefer thin wheat (they actually prefer thick and healthy wheat), but because there are simply more beetles per tiller in thin stands compared to thick ones. We have a lot of thin wheat this year and cereal leaf beetle could be more of a problem than in the recent past.

3. Cereal leaf beetle doesn’t leave overwintering sites until daily high temperatures are consistently above around 60 degrees F. This means that on following a cold winter/spring, we might expect cereal leaf beetle to take longer to leave overwintering. NCCE recommendations are to apply nitrogen before the middle of March and before jointing. This means your insecticide will be applied much to early to do any good against the beetle if you tank mix with much-needed nitrogen over your field.

4. Even in a good year, you can still lose to cereal leaf beetle. Although, on average, you can save by tank mixing when wheat prices are $6 a bushel and higher, cereal leaf beetle can still overwhelm your field if they invade in high densities. The residual of the insecticide runs out after a month. Hence, the tank mixing approach is much riskier than scouting and using thresholds.

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 

e-Mail (required)


characters left

Demco 1400 Grain Cart

Demco offers a 1400 bushel grain cart to provide unmatched efficiency and operator convenience. In addition to the large 1400 ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form