Integrated Crop Management News

Links to these articles are strongly encouraged. Articles may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If articles are used in any other manner, permission from the author is required.

The Source Matters for Getting the Most out of Aerial Imagery

March 10, 2016

As spring plans are finalized, don’t forget to consider aerial imaging as part of a continuous improvement plan. Remote sensing and the use of aerial imagery has been used for decades in agriculture but since 2010 we’ve seen the number of available imagery providers grow extensively. The use of imagery can vary from farm to farm but several common uses include variable rate fertility recommendations, assessing water management performance, quantifying soil compaction and machinery induced yield limiters, locating late season weed outbreaks, and generally evaluating the consistency of crop vigor across a field.  Read more about The Source Matters for Getting the Most out of Aerial Imagery

Selecting Nozzles for Postemergence Herbicides

February 15, 2016

An earlier ICM News article discussing affects of nozzle type and size on spray coverage prompted a question from a farmer regarding nozzle selection. In recent years there have been many advances in nozzle design. The primary improvement has been development of nozzles that minimize the formation of driftable droplets (< 200 micron) while still producing a droplet spectrum that provides the level of coverage required for consistent, postemergence weed control. Read more about Selecting Nozzles for Postemergence Herbicides

Managing Two Soybean Pests to Optimize Yield

February 11, 2016

Soybean cyst nematode (SCN) and soybean aphid (SBA) are important soybean pests in the north-central region. Soybean varieties with host plant resistance for SCN (PI88788) and SBA (Rag1) can suppress pest populations and subsequently protect yield. In addition, seed treatments are becoming widely adopted and now can include a nematacide, fungicides and insecticide. Combining host plant resistance with seed treatments could potentially further protect yield. Read more about Managing Two Soybean Pests to Optimize Yield

Breaking Down Resicore - Does It Pass the Test?

January 27, 2016

The first line of defense against herbicide resistance is using herbicide programs that include multiple herbicide groups effective against target weeds. When using premix products, this involves comparing the application rates of active ingredients in the premix versus rates applied with the stand-alone products. This step is needed to insure that the premix is providing an effective dose of the active ingredient. Read more about Breaking Down Resicore - Does It Pass the Test?

SCN Resistance Continues to Pay Twice in 2015

January 16, 2016

Resistant soybeans are vital for managing the soybean cyst nematode (SCN). But SCN-resistant soybean varieties can vary greatly in their agronomic performance and in the SCN control that they provide. ISU evaluates more than 150 SCN-resistant soybean varieties each year in experiments conducted throughout Iowa. The results of the 2015 experiments have been recently compiled and made available in print and electronically. Results show continued benefits of SCN-resistant soybean varieties in producing higher yields and allowing less SCN reproduction than susceptible varieties. Read more about SCN Resistance Continues to Pay Twice in 2015