The leaves are nice and green, but the stock is brown and looks like it is pulling apart.
Unfortunately, your photos did not come through. I am unable to see the damage. What I can do is provide a collection of articles that can help:
iving. Is it an egg sack of some kind? This is a new one for me. LOL Thanks for any information you can provide! Hello, I found this item (attached picture) on a single corn stalk. All corn plants, including this one, are very healthy and thriving. Is it an egg sack of some kind? This is a new one for me. LOL Thanks for any information you can provide!
Unfortunately, you are in for a time with this one. It appears to be a fungal infection called corn smut. Typically it grows on the kernals, but it will grow anywhere that the plant gets injured. This will be a hard one to get rid of. You may notice it start to change colors. You'll want to get rid of that plant before the growth turns black. It'll stay in the soil for about 3 years. This article will give some more information on the disease and treatment.
https://www.gardeningknowhow.com/edible/vegetables/corn/corn-smut-fungus.htm
I don’t know what is wrong with my corn plants. Most of the stalks are broken and the husk chewed up.
Sounds like animal damage, probably deer. Identifying the animal will help to control it. Here are some possibilities and solutions:
https://www.gardeningknowhow.com/plant-problems/pests/deer/deer-resistant-edibles.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/camouflage-gardening.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/getting-rid-raccoons.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/garden-mouse-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/camouflage-gardening.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/eliminate-rats-in-gardens.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/gardening-with-electric-fencing.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/using-predator-urine-in-gardens.htm
https://www.gardeningknowhow.com/plant-problems/pests/deer/build-a-deer-proof-fence.htm