As I write this week’s Hardin County Agriculture and Natural Resources Update, it is raining again. The abundance of rain has not only caused problems with this year’s planting season, but it has also affected horticultural plants as well. I have been getting a flood of plant problems being brought into the office for diagnosis and recommendations. Most of these problems have symptoms of either too much water or fungal diseases caused by the wet spring and early summer we have experienced so far. It makes for good timing as several of our Hardin County Master Gardener Volunteers just went through a training in Kenton a couple weeks ago to learn more about these kinds of issues. Read the attached article about statewide plant diagnostic clinic that 32 MGVs from 8 counties attended to find out how they might be able to help you diagnose a horticulture plant problem.
I finished trapping armyworm and black cutworm moths for the season as their effect on agronomic crops is now past for this year. We ended up the May-June trapping period with lower armyworm counts and a rising black cutworm population. I have since pulled these traps and put out traps around the county for western bean cutworm. I will be trapping WBC moths July-August, monitoring the population in the area as part of a statewide entomology project. See the attached state WBC map for information about WBC catches for the week ending June 30. It is important that we keep an eye on these populations, and scout fields to look for damage since several farmers are dropping some of the insect traits in their seed corn to save input cost, and while certain insect traits are becoming less effective due to growing insect resistance problems from lack of rotating traits, crops, and control methods. If you want to learn more about WBC, go to the OSU Fact Sheet at http://ohioline.osu.edu/factsheet/ENT-40.
If you are interested in reading about issues in Fruit and Vegetable production, check out the VegNet Newsletter’s new blog at http://u.osu.edu/vegnetnews/ as I have posted reports from Hardin County for both early and late June. Since we have several commercial fruit and vegetable growers in the southeast portion of our county, I have spent considerable time working with these producers to help them with their crops as well as the crops of traditional grain farmers. Plans are progressing on the Hardin County Precision Ag Field Day to be held August 23 at Kellogg Farms near Forest. Make sure you mark your calendar now to save the date. See the attached article for more information about this upcoming local field day that plans to offer both fertilizer certification credit and Certified Crop Adviser credit for those that need it.
We had a good discussion of local agriculture this morning at Ag Council. I hope more of you will join us in the future for these ag breakfasts that usually happen the first Friday of the month, starting at 7:00 am at Henry’s Restaurant in Kenton. Upcoming events in the next week include Men’s Garden Club meeting Monday, July 10 at 6:30 pm at Stewart Coats’ home near Ridgeway; Sheep Improvement Association meeting Tuesday, July 11 at 7:30 pm at Extension office; and the OSU Weed Science Field Day Wednesday, July 12 at 9:00 am at Western OARDC research station in South Charleston. I have included articles below about agronomy topics that you may be interested in reading.
Manure, PSNT and N recommendations – Harold D. Watters, Greg LaBarge
The question has come in several times this year, probably due to the excessive rain, from folks wanting to know how much more nitrogen (N) to add. Recently the question came from a livestock operation. For several years the use of the PSNT – Pre-Sidedress Nitrogen Test – has been recommended in manured or terminated legume situations. Ohio has done field test with PSNT and where soil test result exceed 25 ppm NO3-N additional N is unlikely to increase yield. Both Pennsylvania State University and Purdue University have taken the PSNT a step further providing guidelines to adjust N rates where the PSNT result does not exceed the no application threshold. We often point producers in those directions to learn more. To find out more about nitrogen recommendations in corn, go to https://agcrops.osu.edu/newsletter/corn-newsletter/2017-20/manure-psnt-and-n-recommendations.
How to separate flooding injury from Phytophthora seedling and stem blight – Anne Dorrance
I received many calls last week from areas south of and along Interstate 70 that received more than 3 inches of rain and I expect next week they will come from northern Ohio where 4 or more inches of rain landed in some or our plots. Flooding injury can range from lower roots killed to the whole plants if submerged for a long enough period of time. Flooding injury – Large numbers of plants in low lying areas of field Wilted appearance, some yellowing of leaves. Almost a shepherds hook appearance on the tops. New leaves on mildly affected plants were growing Note grayish color on some of the older leaves. The damage and the yield loss associated with flooding injury are directly related to the amount of time the plants are in a low soil oxygen or high carbon dioxide state. The longer the time, the more damage. To read more about soybean damage from wet conditions, go to https://agcrops.osu.edu/newsletter/corn-newsletter/2017-20/how-separate-flooding-injury-phytophthora-seedling-and-stem.
1st Generation European Corn Borer Management in non-Bt Corn – Andy Michel, Kelley Tilmon
European corn borer (ECB) was once our most important corn insect, but its population has decreased over the past 20 years, likely due to Bt-corn that provides excellent protection. For this and other various reasons, many farms have switched to corn that does not contain Bt proteins to control ECB and other caterpillar pests. Keep in mind that ECB is not an extinct species—we can find ECB still flying around. This year, we have seen ECB feeding in conventional corn. ECB has 2 generations per year. Currently, we are seeing larval feeding on the leaves and in the whorl. Soon, and if not already, these larvae will tunnel through the stalk where they will usually continue to feed and pupate. Adults will emerge in late July-early August. Go to https://agcrops.osu.edu/newsletter/corn-newsletter/2017-19/1st-generation-european-corn-borer-management-non-bt-corn to finish reading this article.
What is the Nutrient Value of Wheat Straw? – Laura Lindsey, Ed Lentz
Wheat harvest is now underway. What is the nutrient value of the straw? The nutrient value of wheat straw is influenced by several factors including weather, variety, and cultural practices. Thus, the most accurate values require sending a sample of the straw to an analytical laboratory. However, “book values” can be used to estimate the nutrient values of wheat straw. In previous newsletters, we reported that typically a ton of wheat straw would provide approximately 11 pounds of N, 3 pounds of P2O5, and 20 pounds of K2O. A 2013 analysis of wheat straw collected at the OARDC in Wooster contained 14-18 pounds of N, 3-4 pounds of P2O5, and 20-23 pounds of K2O. To read more about the nutritional value of wheat straw left in the field, go to https://agcrops.osu.edu/newsletter/corn-newsletter/2017-20/what-nutrient-value-wheat-straw.
Undergraduate Agronomic Crop Internship Program – Steve Culman
This summer a cohort of undergraduate interns are working alongside OSU Extension County Educators to conduct on-farm research. The Agronomic Crop Research Experience (ACRE) interns are placed in county offices throughout the state and work with county educators and state specialists to support on-farm research and extension activities. The program has the goals of 1) training the next-generation of agronomists, 2) empowering locally-directed on-farm research, and 3) identifying solutions to critical agronomic issues in Ohio. This year, there are 9 ACRE interns working across Ohio: Ross Andre (Fulton), Michael Schmenk (Paulding), Rose Vagedes (Miami, Champaign, Darke, Auglaize, Mercer), Abigail Hill (Pickaway, Madison), Cody Clyburn (Fayette, Clinton), Emily Bauman (Ross), Evan Bedard (Highland), Sara Weber (Scioto), and Colin Sandrock (Sandusky). To read more about what these ACRE interns do for the Ag Crops Team, go to https://agcrops.osu.edu/newsletter/corn-newsletter/2017-18/undergraduate-agronomic-crop-internship-program.
Mark A. Badertscher
Agriculture and Natural Resources Educator
OSU Extension Hardin County
1021 W. Lima Street, Suite 103, Kenton, OH 43326