Thread: blown down corn
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Old August 5, 2020   #10
JRinPA
Tomatovillian™
 
Join Date: Jul 2013
Location: SE PA
Posts: 963
Default Corn Lodging

Bumping an old thread since this info as current to us now as it would have been 5000 years ago.

We had nearly 5" of rain yesterday from 7am to 2pm from the tropical storm coming up the coast. The wind picked up near the end and around 1pm my CRW cages (single row abreast to the wind) went over. Single bamboo bean poles broke with the weight. Late last night I checked the corn at the comm garden and all my corn was laid down. The rows run N S and everything was laid over like dominoes from the north to the south.

The roots are up a bit but not many stalks are broken.

This corn was planted mostly around July 1 as soil blocks and was up to about 4 ft for the earliest patch. The second patch a week younger and some from seed, but they all laid over the same. All are double rows with drip. It has been super fast growing, and was really looking spectacular before this.

I'm hurrying to read and then go fix if possible and found this thread. Also two good articles with some studies involved.

https://www.agweb.com/article/hail-a...-you-need-know
https://www.pioneer.com/us/agronomy/lodging.html
https://cropwatch.unl.edu/2020/wind-damage-corn

Quote from the last:
Quote:
Carter and Hudelson (1988) from the University of Wisconsin conducted a study where they manually pushed the base of corn plants perpendicular to row direction after irrigating to saturate the soil. The study was conducted for two years. They noted that within two days after lodging, the upper portion of plants became upright and subsequent timing of plant development was not impacted. However, more barren plants were observed when lodging occurred at later development stages, impacting yield. Corn lodged at V10-12 stages resulted in a 2-6% yield reduction. Corn lodged at V13-15 resulted in a yield reduction of 5-15%. Corn lodged after V17 resulted in a 12-31% yield reduction.
It sounds like I could leave it alone and expect losses up to 1/3 at this stage, but that it will probably come back. Nice to know there have been a few studies. I don't have any known problems with rootworms. I will be sure not to water for a while to help keep the stalks light as possible.

I'm going to go take a look now. Most of it was laid over past 30 degrees, some probably 15-20 degrees off the ground.

I was thinking about Florida Weaving it up for a week or so...but after reading I may leave it. My worry is not the time it would take, but causing additional greensnap.
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