Updates From the Field

The Pioneer Seeds app is a new tool available from Pioneer for download in the app store. With Pioneer Seeds, you can see cumulative GDU’s and 24-hour rainfall data for each of your fields. It also allows us to pinpoint field observations while scouting and send reports of any issues we find. To use it effectively, we need to get your planting data into the database that underlies the Seeds app. Talk with us if you would like to get set up for using this helpful app!

More information about what you can do with the Pioneer Seeds app is available at https://support.fields.corteva.com/hc/en-us/articles/360030661891-What-can-I-do-with-the-Pioneer-Seeds-app-.

Flea beetles like those in the photo below, spotted in a field in Tompkins County, cause only minor chewing damage to corn plants. However, they are a vector for a disease called Stewart's Wilt. Stewart's Wilt is a bacterial disease that affects field corn and sweet corn. Many hybrids are resistant, but Stewart's Wilt can be a big problem on varieties that are not. Early in the season, the disease causes systemic wilt and can result in plant death, and after tasseling it manifests as a foliar blight. The later season blight rarely results in plant death, but can predispose the plant to stalk rot.

If you see flea beetles, you can ask us about your hybrids' resistance levels. And more information about Stewart's Wilt is available from Pioneer at https://www.pioneer.com/us/agronomy/stewarts_wilt_cropfocus.html.

European corn borer larvae are leaving their tell-tale early sign in local fields. Pin holes in your corn leaves like those in the photo below are an indication that the young larvae have started boring into the corn. The European corn borer is a tiny pest at first, but the worms grow quickly and can have significant impact on your corn. The introduction of BT varieties has reduced the corn borer populations in NYS significantly, but there are still occasional infestations. If you observe corn borers feeding in your BT hybrids, it's likely you have found the refuge corn. Conventional corn hybrids that do not have BT protection are susceptible to damage from this pest, which can result in weakened stalks and lodging, as well as creating entry points for diseases and ear and stalk rot. One local grower is using pheromone traps to assess whether a threshold population is present, informing the decision whether to spray.

For more information about European corn borer, see the Cornell Field Crops website at https://fieldcrops.cals.cornell.edu/corn/insects-corn/european-corn-borer/.

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