Blog Archives
Crop Update 8/1/14
Southern rust of corn confirmed in Clay County July 31. Very small, tan-brown lesions on upper surface of the leaf, usually in clusters. Spores inside the pustules are typically orange. This was found on one leaf in a field near Trumbull. Just because southern rust has been found in the area, we don’t recommend automatically spraying. Scout your fields and consider disease pressure, growth stage, and economics. Long season corn and late-planted fields have the potential for most damage. Secondary common rust sporulation has also been confused as southern rust as the secondary pustules tend to look like this. It’s important to obtain microscopic confirmation to know for sure if you have southern rust in your fields.
Microscopic Observation: Spores of southern rust appear elongated vs. common rust appear as near perfect circles.
Another common problem is old common rust lesions being confused as gray leaf spot. The color of this lesion is a tan-gray, typical of gray leaf spot. Using backlighting or a handlens, you can see the pustules within this lesion confirming it is common rust and not gray leaf spot. I’ve had many calls that gray leaf spot was up the entire plant in their fields and after looking at fields, have found it to be common rust in most situations. It’s important to know what disease you truly have to make the best decision on fungicide application.
Have also received questions on soybeans, particularly in dryland. This photo is showing drought stressed soybeans-often occurring in pockets within dryland fields right now. Closer observation shows plants aborting pods and losing lowest leaves. Spidermites can also be viewed on leaves in some of these patches.
Dryland corn showing stress as well. June rains were making for dryland crops with potential, but also led to shallow rooting. Crops could use a drink right now….but would prefer no more hail and tornadoes. The storm that hit Clay County so hard occurred one year ago today.
Storm Damage Resources
Field flooding occurred in newly planted and newly emerged fields throughout the area after recent rains.
Large trees were uprooted falling on buildings, homes, and cars in Sutton after the May 11, 2014 tornadoes.
The Mother’s Day 2014 storms caused significant damage in Clay County and other areas of the State. It never ceases to amaze me how people throughout the area respond to storm damage! Clay County has had its share, and yet the attitude of those affected has been one of thankfulness-thankfulness that no one was injured and that so many still have their homes in spite of damage. It’s also wonderful to see people from all over the County and area pull together with each storm-helping each other out bringing themselves and equipment to pick up debris or help however possible. It’s a blessing to work with and serve the people of this County!
Resources
As clean-up continues, the following are a list of resources that may be helpful to those affected by the storms. Thoughts and prayers go out to all who were affected!
- Numerous Tornado Damage, Recovery, Cleaning, Decision Making resources (scroll to Recovery portion in middle of page)
- Tips for Early Tornado Damage Recovery
- When to Save and Throw out Frozen Food after Power Outages
- When to Save and Throw out Refrigerated Foods after Power Outages
- Flooding and Corn Survival
- Flooding and Soybean Survival
- Evaluating the Need to Replant
Still Time for On-Farm Research!
With the recent rains and cooler weather in the State, producers still have an opportunity to consider conducting an on-farm research experiment that may be of interest to you! So far this year we have producers conducting nutrient management, irrigation timing, cover crop, seeding rates and dates, fungicide timing, and studies of various products on the market including sugar products. You can learn more about conducting on-farm research at our Nebraska On-Farm Research Network Website, our On-Farm Research Grower’s Guide, by Contacting a UNL Extension Educator or Specialist, the Nebraska Corn Board at 402-471-2676 or Nebraska Corn Growers Association at 402-438-6459. You can also learn more from our producers themselves in the video below. We hope you will consider conducting on-farm research this year to answer the questions you may have in your operation!
Proper Tree Pruning
Special thanks to Dr. Scott Dewald for the wonderful evening of information he provided at our tree care workshop last week!
Scott Dewald explaining what to look for when considering pruning a tree. Scott shared that one should never prune more than 1/3 the height of a tree in one season. Pruning should also be done to obtain a main leader and overall structure. It’s also best not to prune limbs more than 2″ in diameter. If the limb needs to be pruned but it encompasses more than 1/3 of the limit of what should be removed in a season, one could “head” the limb by removing a portion of it one year and then complete the cut the following year. This will slow the growth of that limb.
Pruning cuts should always be made at the “bark collar ridge” which produces a round cut and allows the tree to naturally heal. Scott shows attendees where the bark collar ridge is on this branch.
Pruning Fact Sheet ENH847 from University of Florida Extension written by Edward Gilman with good visuals of where proper pruning cuts should occur.
We learned that on large branches, it’s good to make a cut farther out to remove the weight first, and then go back and make the proper cut at the bark collar ridge. Improper pruning can result in further damage to the tree. Here we were trying to correct this tree for not having a main leader. Typically one would leave the southern-most branch according to Scott, but in this case, the northern-most branch was stronger. Scott said there was no need to stake the tree or try to get the northern-most branch to straighten out as it would naturally do this in time on its own.
After a large part of the branch weight has been removed, this attendee is now making the proper cut at the bark collar ridge.
We also walked from tree to tree in the park looking at additional problems. I noticed how high the mulch was piled on some of the trees. Mulch should never be placed against the base of the tree as it can cause rot. But in this case, it was observed that the person who planted the tree did not dig a deep enough hole. What appeared to be a pile of mulch was the actual root ball and soil mounded up above ground.
This situation also most likely was a result of improper planting. In this case, the tree roots began wrapping around the base of the tree girdling it (like choking it).
This is the most common problem I see with tree calls. A huge enemy to trees are weed whackers! In this case, you can see extensive damage to the bark and the base of this tree. Depending on the damage and how well the tree can seal the wound will depend on if the tree will survive or not. Often, as in the case of this tree, the tree will be weakened with few leaves appearing on branches. It’s best to place mulch around trees in order to avoid having to use weed whackers on them-but again, don’t place the mulch up against the base of the tree!
This was a fun workshop for me with the right size of group and great hands-on demonstration where we also learned from pruning mistakes and how best to correct them. Thanks again Scott!
On-Farm Research Update
Hope to see you next week at our Nebraska On-Farm Research Updates to be held March 10 at ARDC near Mead and March 11 in York!!!
Precision Ag Workshops
Agricultural machinery is equipped with numerous tools these days! When it comes to precision agriculture, do you know how to use these tools to the best of their ability for your operation? We’re hosting Precision Ag Workshops in Clay Center and York on January 29th and 30th respectively to help anyone interested learn how to utilize these tools more effectively. Computers, software, and data will be provided, but you are welcome to bring your own yield monitor data card to work on if you wish. Please register for Jan 29th session to Clay County Extension at 402-762-3644 or jrees2@unl.edu or for the January 30th session to York Extension at 402-362-5508 or gary.zoubek@unl.edu.
Soil and Water Conference
Hope you can join us for our Soil and Water Conference tomorrow in Clay Center!
Central Nebraska Extension Master Gardener Program
Interested in plants and gardening? Check out this information about the Master Gardening Program from Elizabeth Killinger, UNL Extension Educator!
New blog posted at http://huskerhort.wordpress.com/ about The Nebraska Extension Master Gardener Program
Do you enjoy plants and gardening? Looking to learn more and hone your skills but don’t know where to go? The Master Gardener program will educate you on many aspects of horticulture, allow you to test your knowledge and skills, all while serving your local community.
The Nebraska Extension Master Gardener program is a horticulture related volunteer training program based in many counties throughout the state. It has been part of University of Nebraska- Lincoln (UNL) Extension since 1976. Master Gardener volunteers are trained by UNL Extension faculty and staff. They contribute time as volunteers working with their local Extension office to provide horticulture-related information to their community. Participants are required to complete 40 hours of training and 40 hours of volunteer service during the initial year of their involvement in the program. Master Gardener volunteers retain their…
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National 4-H Week!
Did you know that more than 6 million young people across the United States are celebrating National 4-H Week October 6-13, 2013?! Research has proven that participation in 4-H has a significant positive impact on young people. Recent findings from the Tufts University 4-H Study of Positive Youth Development indicate that, when compared to their peers, young people in 4-H are:
1) Nearly 4 times more likely to contribute to their communities
2) Two times more likely to pursue healthy behaviors
3) Two times more likely to engage in Science, Technology, Engineering and Math (STEM) programs in the out-of-school time.
4-H is the largest youth development organization in the world! It’s a community of seven million young people across the globe learning leadership, citizenship, and life skills. In the U.S., 4-H programs are implemented by the 109 land grant universities and the Cooperative Extension System through their 3,100 local Extension offices across the country. Overseas, 4-H programs operate throughout more than 50 countries.
To learn more about 4-H locally, contact our office at 402-762-3644 or on our webpage. We would like to visit with you about the program and how you and your youth could become involved! We’re always looking for potential volunteers and program ideas. You can also learn more about 4-H at the State and National levels.
Challenge-Wear a 4-H Shirt and Post it on Facebook or Twitter:
When to Post: October 6 to 12, 2013. Post your pictures then check back to “like” your favorite photos! Official voting ends October 13th at midnight.
How to Enter: Post your picture via:
1) Facebook: post to the event titled: 2013 Wear A 4-H Shirt
2) Twitter: use hash tag #weara4Hshirt
Be sure to tag your photo with your category entry! The picture categories:
1) Most People in One Photo
2) Nebraska Landscapes
3) Fun and Food
The best picture from each category will receive a prize!
JenREESources's Extension Blog 