These are wild and second year for this to happen? Is it a type of fungus?
This looks a lot like Pierce Disease. This article will offer more information:
https://www.gardeningknowhow.com/edible/fruits/grapes/preventing-pierces-disease.htm
I live in AZ it has been 105°. The leaves are changing color and getting spotty. How often should I be watering? I have noticed white fuzz on some parts of the stem. Are there several things going on here? Thank you for your time!
It is a fungal infection from overwatering.
Compensation for heat should be in the form of shade, instead of supplemental watering. Watering should, only, be done when the soil is completely dry down to about 3 or 4 inches. Overwatering, even in the heat, will lead to root suffocation and infection. Roots use the action of soil drying out for all processes including breathing and nutrient absorption, so soil that does not have a chance to dry out thoroughly will be the primary cause for infection.
Treatment will consist of fungicide and proper watering practice.
Here are some articles that will help you from here:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm
https://www.gardeningknowhow.com/edible/fruits/grapes/growing-grapevines.htm
These spot and places on the leaves only showed up about a week ago. The plants are only 1.5 years old. Can you tell me what it is and how to treat it?
They were likely overwatered at transplant, or still in saturated soils.
This will need to be dosed with a fungicide/bactericide. These articles will help:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm
https://www.gardeningknowhow.com/garden-how-to/info/applying-bactericide-to-plants.htm
Make sure that the soil dries, thoroughly, down to about 3 or 4 inches between watering. This can help prevent future infections once you get the current one under control. This article will help you to grow grapes, successfully:
https://www.gardeningknowhow.com/edible/fruits/grapes/growing-grapevines.htm
Something is eating the teensy tiny grapes as they are forming on our 3 Year old vines. I'm not sure if it's birds or not. I can't see any bugs on the little grapes. What should we do?
Those appear to be flowers. They have not swollen yet. Once they lose their reproductive organs, they will start to swell.
Here is an article that will help you to grow grapes:
https://www.gardeningknowhow.com/edible/fruits/grapes/growing-grapevines.htm
Thank you for identifying our grapevine picture as flowers. We are new to growing grapes. What kind of bird netting would you recommend for our vines, as the deer and possibly birds are a nuisance to the vines and the cherry bush right next to our vines. And would essential oils work for whatever is eating our grape leaves? See pic
I cannot see any damage to the grape leaves, only the flowers again.
These articles will help you to keep animals away from your garden:
https://www.gardeningknowhow.com/plant-problems/pests/animals/birds-eating-flowers.htm
https://www.gardeningknowhow.com/plant-problems/pests/deer/deer-repellents.htm
them every 2 weeks and water every 3 days. Can you help? thank you I know it was very hot last year; the leaves were green all the time; cut them back so the sun could get through; have had grapevines for about 3 years, this was the first time they had grapes.
This article should help with your problem:
https://www.gardeningknowhow.com/edible/fruits/grapes/black-rot-grape-treatment.htm
I have a grapevine that has little wormy things that are eating the leaves. How do I get rid of them??
Without a photo it's difficult to know for sure what your pest is but these articles should help:
https://www.gardeningknowhow.com/edible/fruits/grapes/treating-grapevine-problems.htm
https://cdn.shopify.com/s/files/1/0145/8808/4272/files/A1656.pdf
A visit with your local extension office may be able to pinpoint the pest.