Monthly Archives: July 2014
Oysters… Fun Fact Friday
Some great information from Dr. Lindsay Chichester on oyster farming in Alabama.
This past week 1,300 agricultural focused extension folks from around the nation gathered in Mobile, Alabama for our annual conference. There are always great presentations, posters, vendors, and conversations that provide educational opportunities. But we also have a chance to go on a day tour to learn more about something in the area. This year I selected an oyster and crawfish tour. Certainly not something we have much of in Nebraska, but it was very interesting. Today I want to share with you some of the fun facts I learned about oysters.
— Oysters are animals and can be grown in off-bottom gardens. Off-bottom means the oysters are grown in baskets, bags, cages, etc. that are suspended in the water, versus on the bottom of the water source. Off-bottom gardens protect the oysters from predators and helps keep them safe from getting buried in bottom of the water sediment.
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Soybean Management Field Day
Plan to attend the soybean management field day near Shickley this year! Great information for your operation!
Each year Soybean Management Field Days is held at 4 different locations across Nebraska. This year, Fillmore County is fortunate to host one of these programs. On August 13, 2014 at the Stengel farm near Shickley, with registration at 9:00 a.m. and the program running from 9:30 – 2:30 p.m. this educational event will occur. One hour presentations will occur aimed at providing important research based data to soybean producers.
Specifically, topics will include:
- Herbicide applications, water quality and resistance management (demonstrations of herbicide drift with discussion on how to mitigate drift with new herbicide-resistant traits, how weed growth affects herbicide performance, etc.)
- Growth development and growth enhancement products (soybean growth and development, how yield is made and soybean responses to plant density and planting date)
- Multiple soybean input study that includes row spacing, fungicides, insecticides and nutrient management (soil fertility management for soybeans, seed treatment products, risks associated…
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Corn Progression After August 2013 Storm
On August 1, 2013, a severe wind and hail storm damaged 170,000 acres of corn and 86,000 acres of soybeans in Clay County, Nebraska. Corn at the time of the storm was from brown silk-blister. While the storms in the Gibbon/Blue Hill areas occurred a little earlier in the growing season, the following photos show the progression of damage in the event it can be of help to those affected by 2014 storms.
Corn Disease Look-Alikes
Fair week tends to be time for tasseling in corn and considerations for watering and fungicide application are being made. Regarding diseases in corn, there has been confusion about a few diseases, particularly about a disease called physoderma brown spot which some have confused for southern rust. The fungus causing physoderma brown spot feeds on pollen and debris on leaves and does not cause harm to the corn plants themselves. Because the spores of this fungus move via water (it’s closely related to oomycetes), numerous lesions can appear on leaves in bands or areas where water collects. While the lesions may look like early southern rust, there will be no pustules present and often purple colored lesions will also be observed in the midrib, leaf sheath, stalk, and outer husks.
When differentiating between southern rust vs. common rust, there are several criteria to consider and this NebGuide is a great resource. Typically common rust will have brick-red pustules randomly scattered on the upper and lower leaf surfaces that are larger in size. It is common rust that we are currently seeing in our fields.
Southern rust in our area tends to have very small, raised, tan-orange pustules on the upper leaf surface of leaves in localized areas on mid-upper leaves. These pustules are tightly clustered on the leaves. However, color and size are relative as sometimes the two diseases can look alike. Microscopic observation is the best way to differentiate the two diseases. Fungal spores from Puccinia sorghi causing common rust will be near perfect round circles whereas fungal spores fromPuccinia polysora will be oblong in shape.
We do have some gray leaf spot in the lower canopies and I haven’t seen much northern corn leaf blight in the fields. But we do
have a bacterial leaf blight that is affecting quite a bit of leaf tissue on some hybrids. These lesions are long and skinny appearing at first to be limited to the veins. There’s been concern about these lesions being severe gray leaf spot but it’s not and there’s nothing you can do about the bacterial disease. Please don’t mistake this bacterial disease as a fungal one and trigger a fungicide application too early.
Fungicide Application Timing
We tend to see southern rust in our part of the State each year; it’s a matter of time. Triggering a fungicide application too early may result in no residual for when you need it if/when southern rust occurs. Every year some producers make more than one fungicide application due to blanket applications at tassel or shortly after followed by another fungicide application when southern rust occurs later in the year. Consider good fungal resistance management and apply fungicides when disease pressure warrants them in your fields and also consider economics for your situation for proper fungicide application timing.
Is that a Webworm or a Bagworm?
Webworms, bagworms, are they the same thing? If not, why does it make a difference whether you have a bagworm or webworms? It can make a big difference which insect you have to control and the damage that they cause. Correct identification is key to know how to control these pests.
Fall webworms or tent caterpillars are an occasional pest. They are sometimes called ‘bagworms,’ but using the correct common name will help clear up confusion. They appear as white webbed nests on the ends of branches in cottonwood, crabapple, walnut, and other trees. The caterpillars hide in the webbed nest during the day and feed on the trees at night. The caterpillars cause little harm to otherwise healthy trees. Tree health is not usually affected until more than 50 percent of the foliage is eaten. If there are enough nests, about one on every branch, the tree could be…
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