GrainTrader - 10/17/2025 20:23
NEIAAG - 10/17/2025 20:05
GrainTrader - 10/17/2025 19:37
farmer in training - 10/17/2025 19:27
2 weeks apart is NOT too close together. Ask the sugarbeet guys, they used to be 28 days, now 10 - 14.
Maybe I should include that in a trial next year. Thank you for responding. I have a friend in sugar beet production. I’ll have to get some info/ideas on it.
Just my two cents worth but I think you are overthinking it. I have been planning on two passes since the first time I did it back in 2019. Some years, its not worth doing. Most years it is. So my concern is if you do a timing test, you likely found the best scenario for that year. Next year, tar spot comes in late, or southern rust shows up early and the "ideal" application timing is different that year. My suggestion is that since we don't have a crystal ball, go with what statistically is proven the best timing for your area, and plan on the second but be flexible. If you experience the heavy pressure we saw this year, 21 days is too late for the second and 14 days was better. But if is a dry year, low humidity and low disease pressure, you might decide at 21 days to see what it looks like at 28 days - then maybe decide to scrap the second all together. The last two years, we did not spray the second pass even though it was planned. There wasn't enough disease pressure to justify it and there were other more yield limiting factors.
All that said, we combined some corn today
(October 17
) that was still averaging 28 pct. and it looked like it was ready for the silage pit. So definitely if you want to overlap the generics, it will keep the plant alive.
Take care
To clarify, My 21 day apart approach is in the idea of being “proactive” and not waiting to see disease before I spray.
This pic is on a farm after it was sprayed twice. I believe the first pass was probably July 22nd, give or take.
(My first farm was July 15th and I believe this farm was a week after that +/-
). This photo doesn’t do much justice if you don’t see a neighboring field without spray, but this was a field chopped for silage. They missed some stalks as they were chopping and i asked them to leave them to over some pics and videos for a few fiends for comparisons. This was taken Aug 31st. The second pass was probably around the 12th of August. 14-15 oz of quilt each time.
My thought is to be ahead of early diseases and then hopefully stay ahead of a late flush also. Been good corn so far. If our monitors are both set semi accurately, my neighbor and I plant the same hybrids at the same time together. He did one pass of Veltyma and I am at least 10 bushel ahead. Thinking I’m closer to 15+ this year. Will know more after harvest to compare notes with each farm.
I appreciate and look forward to your post on here and the work you’re doing ! Thanks for sharing yours
Fungicide yield results
