zucchini rotten inside

Question

My zucchini is beautiful on the outside and nice and green but inside is black and gooey. Never had this happen before.

Answer 1

Likely some sort of borer insect or worm.
Spray with Neem OIl.
Here are a few links for you.

https://www.gardeningknowhow.com/edible/vegetables/zucchini/solutions-for-common-problems-growing-zucchini.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm