Source
DDrewit•

Just looks like new leaves to me.

13
grapegeek•

Looks normal

5
alwaysawayalwayshere•

100% typical.

5
CondroociousOP•

Is the red tinge or white fuzzy concerning? Sprayed 8 days ago with PureSpray green, will go at it again this week.

3
RoastBeefIsGood•

New leaves have white fuzz and can have red tints depending on what varietal it is. I wouldn’t be concerned personally, this is typical imo.

7
Moorlalm•

Totally normal. White fuzz is likely just a high density of plant hairs. The red tinge is caused by anthocyanin accumulation acting as “sunscreen” for the newly formed leaves.

5
CondroociousOP•

Thanks for the info! I "acquired" this vineyard a couple years ago having no vineyard experience. I'm still unsure as to what everything is supposed to look like, namely whether I have powdery mildew. I found this community a while back and it's been very helpful thus far. Because one of the varieties (Leon Millot) is prone to leaf burn from sulfur I've avoided using it, but if push comes to shove I'll go that way.

2
robthebaker45•

Not sure where you are located, that’d help give an idea of how much risk you may be under. There is a good chance powdery mildew is a risk, it’s one of the major diseases in grapevines. When I see it (Northern California) the faintest sign is usually a light speckled discoloration across many mature leaves, the discoloration may be accompanied by small indentations which have a thin layer of white powder in those spots, all of this can be difficult to see.

A lot of places will have resources that measures powdery mildew pressure on a regular basis that you can check, in California we use the risk assessment index (RAI)

I’d be surprised if local agricultural resources didn’t have something similar in most regions around the world because powdery mildew is a common problem for many other crops too.

Edit: I also agree that white fuzz and bronze tinge to new growth is not problematic.

1
CondroociousOP•

Willamette Valley. I had a look around, didn't find anything provided by Oregon State extension service akin to your resource in California. I may install a weather station at the vineyard site, then write a program to do the assessment for me...

1
Moorlalm•

Here's a helpful risk model for grape powdery mildew from Oregon State! I believe it uses the Gubler-Thomas model for powdery mildew which is something else you could check out if you're interested.

1
acoradreddit•

Really not at all a specific question...

1
BenghaziBob•

I thought my new leaves were dead because they were popping out white like that. Turns out they are fine

1
GuitarGoblino•

As others have said, looks fine to me.

1