Rootworm Beetle Silk Feeding

A while back, I observed some fields with high corn rootworm beetle pressure.  I'm sure we're all familiar with the damage they can do in their larval form chewing up roots.  This year, I noticed an unusual amount of pressure from the beetle form.

The first symptom is a scratching appearance on the corn leaves.  As silks and tassels form, one notices the beetles begin to move and feed on these delicious, vulnerable organs.  Tassel damage is bad, but silk clipping is where they really cause damage.  A silk that is clipped early is a kernel that does not pollinate.  I will follow this feeding through the season to see how much damage occurs.  Older thresholds are not very reliable with today's grain prices.

Corn leaf blotches

I have received a few phone calls this week about yellow blemishes showing up on corn leaves.  This looks similar to HPPD inhibitor damage (such a Callisto).  However, it is caused by dirt that had clung to the plant earlier in its life.

The blocking of sunlight causes the plant to focus chlorophyll production elsewhere so it can be more productive.  As the plant grows and the dirt falls off, the chlorophyll production should start back up.

There should be very minimal (if any) loss in production due to this syndrome.



New Sidedress Bars-UPDATE

Here's what we will be getting for our 2 new bars:

12 row DMI Bar

1000 gallon tank

120” fixed axle

Tractor tires

Raven controller and pump w/ Sky Trac


We are working on getting them in and assembled.  They should be ready to roll soon!

New Sidedress UAN bars

Ag Partners will have two new sidedress UAN bars available this spring in our area!!!  More details to come, but this is an exciting addition to enable late or additional nitrogen applications!  Lets get the nitrogen where the plant needs it, when the plant needs it!

NEW MACHINES ARE IN!!!

Our new spreaders are now in!  Check out these beauties!!!

More than Manure

Recently, I have been testing a new product called More than Manure by SFP.  It contains Nutrisphere (a nitrogen stabilizer) and Avail (which make phosphorus more available).  It is a revolutionary product because of it's ease of use.  It can be poured directly into a lagoon or pit and will disperse by itself!

http://www.youtube.com/watch?v=B8SO3s6Fm6A&context=C4a0f2a6ADvjVQa1PpcFOs--8Vt3V2cGsWxKK3ZB431EEypSPJyPo=

Additionally, it can have some other benefits including eating up solids/crust (making manure more flowable) and reducing ammonia levels (increasing animal health and neighbor happiness).

This is a NEW product, so I have a couple test of it running.  In my testing, I have seen a pretty significant reduction of ammonia and a lessening in the crust (though not completely eliminating a heavy crust).

Please check out the video!

Fungicides Plus!

March 15^th is the deadline for those prepaying fungicides to receive significant rebate incentives!!!

There has been a lot of debate lately regarding fungicide timing, rates and performance.  Timing is the key with fungicides.  Today’s fungicides contain both curative and preventative products.  In corn, the ideal time to spray is full tassel.  In beans, we need to shoot for R3.  Being off one week can reduce response substantially.  When customers buy their fungicide from me, I keep an eye on their crops’ progress for them to ensure appropriate application timing.

ISU trial data

Recently, V4 to V7 applications have become very popular in corn.  Farmers will add a full or partial rate of fungicide to their herbicide mix while spraying in this window.  This has proven to provide strong yield bumps, but I feel it should be considered an ADDITIONAL application.  When applied early, residual control can run out before plants need it most.

Fungicide response can be very hybrid specific!

Additionally, when you are running over the field at VT/R3, it is a good idea to throw a long residual insecticide in the mix. Though you might not be at threshold for any one insect, it’s a safe bet that you will pick up the $7/ac(ish) the insecticide costs from cumulative control of corn rootworm beetles, corn leaf aphids, spider mites, soybean aphids, grasshoppers, green clover worm, etc. In beans, if you need to spray a second round of insecticide for aphids, most insecticide companies will help pay for the chemical needed.

Notice better filling at the tip!

Helena's product, CoRoN, is a foliar nitrogen product that uses boron to help bring the nitrogen into the plant more efficiently. This is ideal for fungicide and insecticide applications because it assists in the fungicide uptake and effectiveness as well.

Sources:

Helena Chemical Company

Syngenta

Iowa Stute University Extension: Alison Robertson and Daren Mueller.  Publication: http://www.extension.iastate.edu/CropNews/2012/0109robertson.htm