Corn Newsletter : 2016-13

  1. Total Precipitation
    Author(s): Jim Noel The weather pattern has become favorable for planting. In the short-term planting is favorable but it could become less favorable in the next 1-2 week again so it is worth taking advantage of the window.
     
  2. Author(s): Laura Lindsey

    Wet weather has kept many farmers (and us) out of the field.  According to the USDA National Agricultural Statistics Service, as of May 15, 10% of the soybean acres were planted.  At the same time last year, 46% of soybean planting was complete.  On average, in Ohio, the majority of soybean acres are planted mid to late May (Table 1).  Although, it is not uncommon for soybean planting to creep into June.  In general, we don’t recommend altering soybean management until planting in June.  Below are some guidelines to consider if planting soybeans in June.

  3. Replant corn decision
    Author(s): Peter Thomison

    Although most corn that’s been planted has yet to emerge or develop much beyond the VE or V1 stage, there are localized reports of growers replanting early planted corn. Some of these replant issues appear related to the consequence of recent frost injury combined with excess soil moisture or flooding.

  4. black cutworm feeding above ground
    Author(s): Kelley Tilmon, Andy Michel

    We have started to see cutworm damage in Ohio corn.  Black cutworm (BCW) is the prime offender, though other species exist.  Adult BCW (moths) are migrants from the south that start moving into Ohio in April, and lay eggs that hatch into the cutworm caterpillars.  Although there are some hotspots for egg laying, these predictions are far from exact.  Moths tend to seek out fields with a lot of weeds, especially winter annuals such as chickweed, to lay their eggs.

  5. frost damaged soybeans
    Author(s): Laura Lindsey, Peter Thomison

    Soybean: Last Monday, May 16, air temperatures dropped to high 20s/low 30s causing some freeze injury to soybeans. Soybeans in low areas of the field are most likely to be affected. Plants should be assessed for damage at least five days after suspected injury to inspect for regrowth. If damage occurred above the cotyledons, the plant will likely recover. If damaged occurred below the cotyledons, the plant will not recover. Look for a discolored hypocotyl (the “crook” of the soybean that first emerges from the ground) which indicates that damage occurred below the cotyledons.

  6. cressleaf groundsel flowers
    Author(s): Mark Loux, Jeff Stachler

    It’s definitely a big year for cressleaf groundsel (Senecio glabellus), that yellow-flowered weed that can be seen about everywhere right now.  While it is most often found in no-till corn and soybean fields that have not yet been treated with burndown herbicides, there seems to be an above-average number of wheat and hayfields and pastures with substantial populations.  Cressleaf groundsel can be identified by its hollow and grooved stem with a purplish color, and yellow sunflower-type flowers.  It is a winter annual that emerges in late summer into fall, and can infest late-summer seeding

  7. fusarium head blight prediction center
    Author(s): Pierce Paul, Jorge David Salgado

    Wheat is now flowering in parts of central Ohio and will continue to flower in more northern counties later this week and into next week. According to the FHB forecasting system (http://www.wheatscab.psu.edu/), the risk for scab is low in central and northern Ohio for fields flowering at this time (May 23). Although it has rained fairly consistently over the last 7-14 days, conditions were relatively cool last week, which likely reduced the risk of the scab fungus infecting the wheat spikes.

About the C.O.R.N. Newsletter

C.O.R.N. is a summary of crop observations, related information, and appropriate recommendations for Ohio Crop Producers and Industry. C.O.R.N. is produced by the Ohio State University Extension Agronomy Team, State Specialists at The Ohio State University and Ohio Agricultural Research and Development Center. C.O.R.N. Questions are directed to State Specialists, Extension Associates, and Agents associated with Ohio State University Extension and the Ohio Agricultural Research and Development Center at The Ohio State University.