We have seen a lot of spray planes flying around lately, and most of them are spraying to prevent insect damage.This is a stressful time of year as the corn is pollinating and we want to get a good crop at harvest time.
Pesticides are a great tool if an application is warranted and will fit into a farmer’s operation. Unfortunately, hot, humid days were accompanied by warm nights in July, which allowed for plenty of insect activity and an increase in disease pressure.
Southern rust has been reported in counties south and east of Dawson County, which is one more headache to deal with. Southern rust spores are not capable of overwintering in Nebraska, as they require warm temperatures to sporulate (upper 70s to lower 80s F, especially nighttime temperatures).
Rust spores typically blow in from southern, tropical areas each year. Recent reports indicate that this is the earliest we have seen southern rust develop in Nebraska in a decade.
This may be alarming for farmers, as southern rust can be quite aggressive compared to its close relative, common rust. We see common rust in most fields every year. Treatment usually is not warranted. Common rust develops earlier in the growing season when it is cooler.
Common rust pustules are irregularly scattered on the upper and lower leaf surface and they produce dark, brick red spores.
Southern rust can be distinguished by pustules on the upper leaf surface in clusters and spores are light orange to tan in color. Since corn is pollinating, it is critical to scout fields to determine if southern rust is an issue and if a fungicide application is needed. Late-planted fields are at a higher risk for disease development and yield loss, since more diseases will probably become an issue as the growing season progresses.
Remember, fungicides are an added cost to production and a timely application can help save money during the growing season, compared to several fungicide applications. Systemic foliar fungicides can be quite effective at managing southern rust. However, the residual in systemic fungicides is approximately 21-28 days, so timing is important when making these applications to effectively manage diseases this year.
If you see southern rust in your field, please consider submitting a sample to the Diagnostic Clinic for accurate diagnosis prior to treating.
More information and updates on southern rust can be found at http://cropwatch.unl.edu/2017/southern-rust-corn-confirmed-eastern-nebraska-and-northern-kansas.
Soybean Field Days
The Nebraska Extension will host their 2017 Soybean Management Field Days at four locations in early August. Topics covered include:
• Early season crop stress effects on production, insects and seedling diseases;
• Maturity group and traits, cover crops and weed management;
• The good, bad and ugly when spraying the new herbicide formulations in soybeans;
• Marketing and policy outlook; and
• Impact of tillage on seeding rates, evapo-transpiration and soil factors affecting yield. Pre-registration is not necessary and meetings are sponsored by Nebraska Extension with support from the Nebraska Soybean Checkoff and the United Soybean Board.
Onsite registration begins at 9 a.m., with presentations from 9:30 a.m. - 2:30 p.m.
Lunch is included and CCA credits are available.
The following meetings are held in our area:
Aug. 8 in North Platte at the University of Nebraska West Central Research and Extension Center. The field is south of I-80 and west of Hwy 83, on the north side of State Farm Rd
Aug 9 in Ord at the Tad Melia Farm (47485 814 Rd. Ord.} The Field Day is on the west side of the road. More information about Soybean Management Field Days, other locations and so forth can be found at http://ardc.unl.edu/soydays, or by calling 1-800-529-8030.
NE Grazing Conference
TheNebraska Extension will be hosting the Nebraska Grazing Conference in Kearney Aug. 8-9.
The conference is open to the public and may be of particular interest for folks with pasture ground, land managers, policy makers, and those who graze cattle.
Topics at this year’s conference include:
• Water points and fencing NRCS cost share programs,
• Forages v. row crops,
• Much more.
There is a fee to attend this conference and online registration is highly encouraged prior to Aug. 1. Registration is still open after Aug. 1, but the cost to attend increases after that time.
The Nebraska Grazing Conference is held at the Ramada Inn in Kearney.
The doors open on Tuesday, Aug. 8 at 9 a.m. The two-day event will conclude around 2:40 p.m. on Wednesday, Aug. 9.
For more information on the conference, speakers, and to register, click on this website http://grassland.unl.edu/current-conference, or call 402-472-5636.