Field Crop Update, September 28, 2023

Erik Smith, Area Field Crop Specialist/Team Leader
Central New York Dairy and Field Crops

September 29, 2023

As I drive around the region, I see more and more winter grains popping up! As we get further into the fall growing season, keep an eye on the weeds so you're prepared to manage them in spring.

Once again this year I have funding from the NY State Corn and Soybean Growers Association to provide free testing for soybean cyst nematode in soybean fields. If you're interested, please get in touch.

Lots of silage being harvested this week, but if your crops aren't quite there yet, next week should be the week. Other than some rain tomorrow, we should have phenomenal harvesting weather coming up. Happy harvesting, and stay safe-

Further into fall, we're expecting warmer weather than usual, thanks to El NiƱo. See our weather outlook from Jessica Spaccio (Climatologist, NRCC):

7-day precipitation amounts
outlook for October 5-11
October outlook
outlook for October, November & December


2. Growing Degree Days See: Climate Smart Farming Growing Degree Day Calculator. Check your location, planting date, and silking date. Silage corn
needs 750-800 GDD after silking to reach a whole plant DM of 32%. Under typical late season dry down conditions we can expect the crop to reach 35% DM
four to seven days later. For more details, see this article. No matter what the numbers say, check your crop!

Hybrid Relative Maturity (day length) | GDD from silking date to reach ~32% DM
101-110                                                800
96-100                                                  750
<96                                                       750 or slightly less

Highlighted in blue: Time to make plans (35% DM anywhere between 5 - 11 days from now, depending on maturity)
Highlighted in green: Gas up the harvester and the trucks (35% DM in 2 - 8 days, depending on maturity)
Highlighted in yellow: See you in the field (35% DM in less than a week):
Highlighted in red: It's either already in the bunk or it's going for high-moisture corn or it's going in the bin for grain (DM likely > 35-40%)

Growing Degree Days as of September 26





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Upcoming Events

El "Break" Info-Lechero 2025

September 3, 2025
September 10, 2025
September 17, 2025
September 24, 2025
October 1, 2025
October 8, 2025
October 15, 2025
October 22, 2025
October 29, 2025
November 5, 2025

Dairy Spanish Webinar Series, free but registration required.  Only available in Spanish.

View El "Break" Info-Lechero 2025 Details

Corn Silage Dry Down Day

September 12, 2025
Fort Plain, NY

Free event.  No registration needed

View Corn Silage Dry Down Day Details

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Spotted Lanternfly

Lycorma delicatula, or Spotted Lanternfly (SLF), is an invasive plant hopper from Asia and is an agricultural pest. In the United States, it was first found in Pennsylvania in 2014. Spotted Lanternfly has been found in New York State on Staten Island, all New York City boroughs, Long Island, Port Jervis, Sloatsburg, Orangeburg, Ithaca, Binghamton, Middletown, Newburgh, Highland, and the Buffalo area. SLF threatens the agriculture and forestry industries, and is also a nuisance pest. The nymphs and adults feed on over 70 different plants, but is especially detrimental to grapes, a black walnut, hops, maple trees and apples. New York State Ag and Markets supported CCE efforts to help bring awareness to communities and we developed this Public Service Announcement and would appreciate you sharing it with your member lists. 



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