Petiole Sampling

I decided to have a petiole analysis performed on all three cultivars that I grow. Noiret, Corot Noir, and Traminette. The vines sampled were planted in 2004.

Each sample requires that you pick between 60 - 80 leaves.

You then remove the petioles, which are the leaf stems.

I used a basket for gathering leaves. You need to select the newest mature leaf from the shoot. This is usually 5 or 6 leaves from the shoot tip.

You just pinch off the leaves.

Then you will have a petiole in your hand.

When all the petioles are collected, they need to be quickly rinsed in a mild detergent. Just a dab of laundry soap in a bowl.

Don't soak them, just a quick dip.

Followed by a quick rinse.

I dried the petioles off on a paper towel, being certain to keep the three cultivars separate.

I then transferred them to aluminum foil, and popped them in a 200 degree oven for about 15 minutes.

That will remove a lot of the moisture, but not all.

They were then placed in the sample bags provided by Cornell.

Below are the application forms for the petiole anayses that I submitted, and the Analysis Reports which were sent back to me, with recommendations for each of the three cultivars.

This is the Analysis Application for the Corot Noir vines:


This is the Analysis Report for the Corot Noir vines:


This is the Analysis Application for the Noiret Vines:


This is the Analysis Report for the Noiret vines:


This is the Analysis Application for the Traminette vines:


This is the Analysis Report for the Traminette vines: