Interesting Start to July
2016 is turning out to be an interesting year with good yield potential as of July 1. The nice early April weather allowed much planting to be completed in the mid-April time frame. Late April turned cold and wet, which challenged the emergence of some corn planted April 22 through 25. Some replant was needed for corn planted during this window and some pythium root rot occurred in the corn that struggled with emergence. Corn planted May 5th or later, generally looks good in Eastern Iowa. Warmer than normal temperatures persisted till mid-June allowing corn to rapidly progress. For example, our show plot at the Miller Hybrids office, which was planted April 23, had the first corn silking on June 30, about 10 days ahead of normal. There were a few multiple-inch rains in some fields in late May and late June which caused significant Nitrogen loss, while some Southern and Central Iowa areas have suffered drought stress. Disease development was initially slow, but because of recent rains, conditions are now highly favorable for disease in many fields. Weed control was a challenge due to cool early temperatures and excess heat later, making herbicide uptake difficult. It was also a difficult year to kill cover crops, leading to some competition for nutrients.
Some European Corn Borer Moths and Corn Rootworm (CRW) beetles have been observed recently. For CRW beetles, be sure to scout at silk emergence to determine if there is a need to spray insecticide to prevent silk clipping and pollen feeding, especially on late planted or uneven emerging corn. We observed significant first generation European Corn Borer (ECB) on conventional or herbicide only refuge corn in June. The second generation is getting started already and it often will attack your later planted corn. If an insecticide is needed, we suggest combining it with a fungicide application due to the current ideal conditions for disease development. I recommend close monitoring for silk or pollen feeding and quick insecticidal treatment if damage is observed. This is also a key time frame for Western Bean Cutworm (WBC) flights. WBC can be quite damaging to the yield and grain quality unless you spray or have genetic control (Agrisure Viptera®, or hybrids containing the Herculex1 gene for example). Contact Miller Hybrids for assistance in scouting or digging roots to observe CRW feeding.
Continue to scout soybeans for aphids and spray with an insecticide if aphids are at threshold levels. Aphids may also increase the damage from nematodes (ISU verbal communication).
This may be a troublesome year for weed control in many fields, due to herbicide tolerance or due to cool early temperatures and excess heat later, which both made herbicide uptake difficult. It was also a difficult year to kill cover crops, leading to some competition for nutrients in fields with unkilled cereal rye. This year, it appears that a two or even three pass chemical program may be needed in some fields to adequately control weeds. Late application of herbicides in corn requires the use of drops with proper sprayer tips and proper additives to get the job done without crop injury. Only Miller Hybrids corn varieties which have a “G” (for Glyphosate) or Roeschley Hybrids varieties with VT2P, VT3P, SS or G, in the hybrid name, can be sprayed with Roundup® or Glyphosate. Contact your chemical representative for proper advice on rescue herbicides.
This year we have observed a limited amount of Common Rust is present on corn leaves and we have seen the start of Northern Corn Leaf Blight and Grey Leaf Spot (GLS), although in general leaf diseases have been slow to develop. However, due to the recent rains and heavy dews, I expect this could be a year with a high incidence of leaf disease. The high incidence of Northern Corn Leaf Blight (NCLB) in 2015 left a lot of inoculum on residue and could set us up for a disease problem again this year. I am still inclined to apply Headline AMP® or a similar fungicide in heavy residue fields, corn-on-corn, low lying fields and on hybrids which are more fungicide responsive for yield and standability. A greater economic advantage exists for fungicide application, if you already need to apply an insecticide. We feel the ideal time to spray a fungicide on corn is around the first brown silk, however if CRW or Japanese Beetle clipping of corn silk occurs, I would apply the fungicide with an insecticide during flowering, just don’t use an adjuvant if applying fungicide during silking.
Goss’s Wilt (GW) is a bacterial disease which won’t be controlled by fungicides, except for the fact that fungicides will keep the plant healthier overall. GW lesions can be quite large and are irregular shaped and appear water-soaked. Infection by GW bacteria require an open wound or leaf tear and will be worse in high residue continuous-corn fields which experienced hail or wind damage. The most effective control options are crop rotation or planting a tolerant corn variety. Goss’s Wilt is slowed by hot, dry conditions.
Soybean diseases including Sclerotinia White Mold (SWM) and Sudden Death Syndrome (SDS) could be prevalent this year and fungicidal control may be justified for SWM at R1 to R3. Miller Hybrids sells a Soybean Cyst Nematode (SCN) seed treatment from Syngenta® called Clariva®, which in addition to excellent nematode control, it can help in reducing Sudden Death Syndrome (SDS) fungal infection, which is worsened when nematode damage is high. The conditions appear right in 2016 for a potentially high level of SDS in soybeans in fields where saturation of soils during early flower occurred. SDS management includes SCN control, improved drainage, and planting highly tolerant varieties (true resistance does not appear to exist). Many of the soybean varieties Miller Hybrids sell, have excellent SWM and SDS tolerance scores.
Products, Programs and Contacts
Several new elite varieties are being produced by Miller Hybrids for the 2017 sales year. Miller Hybrids offers an excellent portfolio of unique corn hybrids with herbicide and insecticide trait options, focused in the 90 to 115 day market, as well as elite new conventional corn varieties. Miller Hybrids is the exclusive provider of Roeschley Hybrids™ soybeans in Iowa and Wisconsin with varieties specifically chosen by Miller Hybrids. Miller Hybrids Alfalfa continues to offer excellent value, beginning with two elite fine stemmed hybrid varieties ,MA-379HY/BR and Profusion, and a high yielding fine-stemmed standard variety called Seneca.
We will offer available seed at 2016 prices with a 12% prepay discount if purchased in July, 2016. This will also guarantee you our lowest price. Please return the pallets or boxes we delivered or call us for pickup.
Miller Hybrids team of seed experts are available to visit your fields, answer questions, and provide profitable solutions that fit your farming operation. Visit www.millerhybrids.com or call us toll-free at 866-946-CORN, or in Iowa call Bob Miller 319-325-6158, Brock Adrian 319-530-6505, Clayton Hester 641-295-4963, Dave Vyrostek 515-360-3045 or Denny DenHartog at 563-940-2744. In northern Illinois call Steve Pfile 815-449-2573, in East Central Illinois call David Brint 309-255-9010, or in central Wisconsin call Mike Read 920-918-2220. Let us work with you to provide the right seed solution for the way you farm.
Thoughts from Ph. D. Corn Breeder and Miller Hybrids Owner, Bob Miller.
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