I have good news to report today as I still have not found any Western Bean Cutworm moths in any of the four traps around the county. This is the same result for most of the state for the past four weeks. Also, I have yet to find any Soybean Aphids or Green Stink Bugs as of this time. If you see any of these pests in your fields, please let me know as Extension is trying to see how bad of a problem we might have in Ohio.
I wanted to remind everyone of the Hardin County Crop Walk program that is going on Tuesday, August 20 from 6:00-8:30 pm. The program will include an emphasis on fruit and vegetable production. The location of the program will be 19809 County Road 200, Mt. Victory, Ohio 43340, which is about a half mile past the Scioto Valley Produce Auction. See the attached news release and flyer for further information.
The Extension office now has Farm Science Review tickets available. This year’s Farm Science Review is September 17-19 at the Molly Caren Agricultural Center in London. Tickets are $7.00 presale and $10.00 at the gate. Children 5 and under are free. Make sure you purchase your presale tickets by September 16. If you are a teacher or someone who needs to get a purchase order, now is the time to do the paperwork. If you are an agribusiness that normally gets tickets to sell from our office, let me know so I can get you an allotment. This year’s theme is “Break New Ground” so go to http://fsr.osu.edu/ to start to plan your trip to this year’s show.
This week Amber Buzzard, a District Sales Manager with Channel Seeds stopped by the office. Buzzard lives in Forest and is interested in setting up seed dealers in the county. Check out their website at www.channel.com for more information about their products and opportunities. She will be presenting the program for our September 13 Ag Council Meeting. Below are some articles and other information that you may be interested in reading.
Soybean Aphid Update – Ron Hammond, Andy Michel
We are receiving our first reports of soybean aphids reaching levels that require insecticide treatment in counties just south of Lake Erie. Mid-August is time of the summer when we normally see outbreaks in Ohio. Because of this, we would urge growers to check their soybean fields to see if aphids are reaching threshold levels. However, because the majority of reports indicate low population levels, we recommend that growers only treat fields that have been scouted and where thresholds of 250 aphids per plant are reached. See the fact sheet at http://ohioline.osu.edu/ent-fact/pdf/0037.pdf for further information.
Assessing the 2013 Corn Crop : The Ohio’s Country Journal Crop Tour – August 7-8, 2013 – Peter Thomison
Last week I had an opportunity to participate in The Ohio Country Journal Crop Tour (http://ocj.com/2013/08/2013-i-75i-71-ohio-crop-tour-summary/) which evaluated the status and condition of the corn and soybean crop in 40 counties across the state. I was part of a team that visited 20 fields in the western part of Ohio – the I-75 tour. Another team evaluated corn and soybean crops along I-71. We stopped at fields that allowed an assessment of a corn and soybean field in close proximity. Yield checks were based on the “Yield Component Method” described in last week’s C.O.R.N. newsletter (http://corn.osu.edu/newsletters/2013/c.o.r.n.-newsletter-2013-25/estimating-corn-yields-prior-to-harvest). However, time constraints (about 20 minutes per field) limited our yield assessments to no more than three sites within each field. To continue reading this article, go to http://corn.osu.edu/newsletters/2013/2013-26/assessing-the-2013-corn-crop-the-ohio-country-journal-crop-tour-august-7-8-2013.
Common Bagworm – (Thyridopteryx ephemeraeformis) feeding season is coming to an end. Curtis Young and Joe Boggs reported that bagworm caterpillars in northwest and southwest Ohio, respectively, are beginning to tie their bags to anchorage points and are closing the bags’ openings in preparation for pupation. While there remains some earlier instar bagworms mixed among older caterpillars, by and large it is too late to treat with an insecticide to effectively manage bagworm populations for next season. To read more, go to http://bygl.osu.edu/content/windshield-wipes-54.
Stink Bugs on Soybeans – Andy Michel, Ron Hammond
As we get into the full pod and beginning seed development stages, we need to turn our attention to possible problems with stink bugs, mainly the green stink bug and red-shouldered stink bug. But before we limit ourselves to those two, keep in mind that we are still anticipating the brown marmorated stink bug becoming a problem on soybeans. Because stink bugs cause direct injury to the pods and seeds, it takes fewer of them to cause economic losses. Losing an average of only 1-2 seeds per plant will equal the cost of an insect application. Thus, growers across Ohio should scout their fields for stink bugs with either a sweep net or by hand. When sweeping, the threshold for regular soybeans is four or more stink bugs, adults or nymphs, per 10 sweeps. For soybeans grown for seed or food grade, we would lower the threshold to two per 10 sweeps. If counting the stink bugs directly, two stink bugs per foot of row throughout the field is the threshold, with just a single stink bug as the threshold for seed and food grade soybean. However, these levels should be across the field and not only in a few locations. More information on stink bugs can be found on our newest fact sheet available at http://oardc.osu.edu/ag/images/StB_Factsheet_June_26.pdf.
Check your Walnut Trees for Thousand Cankers Disease – The Ohio Department of Agriculture (ODA) has announced that TCD of walnut has been confirmed in Butler County, Ohio. This disease of black walnut (Juglans nigra) is caused by a fungus (Geosmithia sp.) that is carried from tree to tree by the WALNUT TWIG BEETLE (Pityophthorus juglandis) (WTB); a type of bark beetle. For more information about how to identify this problem, go to http://bygl.osu.edu/content/thousand-cankers-disease-tcd-confirmed-ohio.
Mark A. Badertscher
Agriculture and Natural Resources Educator
OSU Extension Hardin County
1021 W. Lima Street, Suite 103, Kenton, OH 43326