Showing posts with label Senescence. Show all posts
Showing posts with label Senescence. Show all posts

Thursday, November 16, 2017

Muscat's last stand.

Vinogirl is back in Vinoland.
I may have returned from my trip to Blighty, but Vinoland's grapevine leaves are currently in the process of, well, leaving.  The biological aging of the vines, senescence, is very definitely taking place.  Whilst the leaves were mostly green when I left, just over three weeks ago, they are now, for the most part, yellow.  In fact, the leaf in the photograph is one of the very last leaves on the Orange muscat vines.  Theory holds that it is decreasing day length that triggers the biological process of senescence.  I really can't blame the leaves for departing, I do not like the nights closing in myself.  But I'll survive: I'll patiently wait for the reappearance of Vinoland's grape leaves next March.

Thursday, October 13, 2016

Cabernet revealed.

I spent most of today leaf pulling in the Cabernet sauvignon vines in preparation for harvest tomorrow.  I got a good look at the fruit as I stripped the leaves away and I'm estimating the crop is a little lighter than last year.  And the vines seem to be shutting down rather early.
The leaf pulling was a very dusty activity, I was filthy by the time I had finished.  The Napa Valley is expecting its first storm-series of the season tomorrow, perfectly timed to coincide with the Cabernet harvest.  It will be a rather soggy harvest event, but at least I, and the grapes, will be clean at the end of it.  Oh well, sigh.

Monday, November 16, 2015

Closing up shop.

Autumn is well and truly here.  In fact, I'd have to say that it was really quite wintry when I left for work this morning as everywhere was white with frost.  The vines are all busy shutting down and are losing their leaves.  Triggered by decreasing daylight hours, senescence begins in the mesophyll cells located in the margins of the grape leaf and slowly advances inward.  (The leaf above is a great example).  Temperature does not play a part in the onset of senescence, but frosty mornings will definitely speed up the whole process.  And yesterday, I harvested my last batch of tomatoes, so I think it is finally time to admit summer is over, sigh.

Saturday, November 15, 2014

Back in the U.S. of A.

I'm back Stateside.  After a great holiday, I have returned to the Napa Valley.  The journey back was long and tedious, the only highlight being an Elvis impersonator who was on the flight from Manchester to London.  I lost track of Elvis in Heathrow.  I was hoping he would be on my flight from London to San Francisco, but, alas, he was probably on his way to Las Vegas.
It seemed like I was away for ages.  I don't know why, but I expected all sorts of things to be different when I woke up my first morning back.  The vines are a little more yellow, senescence is well and truly happening, but only the white grape varieties have lost any leaves to speak of.  It's a little cooler, but not cold, so there isn't a need to turning the heating on yet.  Still, it definitely feels like autumn.  Vinodog 2 made a big fuss of me, but she is such a creature of habit that just 5 minutes later it was like I'd never been away. 
Vinomaker was doing wine stuff when I left; racking, barreling down, topping etc., and he was still doing wine stuff when I got back.
Constancy is good.

Friday, November 16, 2012

Muscat mosaic.

Rain today, sigh.
The poppy seeds that I planted last Sunday will have had a a good watering today.  In fact, rainy weather is forecast to continue all the way until Tuesday, double sigh.
I must admit, Vinoland and it's environs look rather pretty right now, as there is already a green-haze of r-selection plants covering vineyards, roadsides and every other available surface.  I will, however, have to say a reluctant goodbye to the fetching leafy-patchwork of warm, autumnal hues that until recently were the verdant sugar-factories of Vinoland's Orange Muscat vines, oh well.  The now soggy leaves will breakdown and will eventually be available, to the very same vines, as organic matter.  And the cycle continues...

Sunday, September 25, 2011

First autumn rain.

A wet spring, late budbreak, a cool summer, elevated powdery mildew pressure, senescence of the vines, and now a rather untimely autumn rain. Apparently, Mother Nature gave up drinking wine in 2011 without telling anybody about it, and now it seems that she has determined to not let anyone else even consider producing a vintage this year.
My poor grapes.

Saturday, September 24, 2011

Bye bye leaves.

The leaves of Vitis vinifera live for approximately 150 days: that's almost a full 5 months, from the time of budbreak, of basking in the warm California sun. The basal leaves, the first to appear in the spring, have done their very best for this vintage and are now amongst the first to slowly take their leave. See ya next year!

Thursday, November 26, 2009

Happy Thanksgiving Day.

Happy Thanksgiving to all who are thankful for something in their life.
I am thankful for many things; for living in such a pretty part of the world (look at how cute Napa is right now), for my family and good friends, for good health, for great Vinodogs, for good wine...and a husband who makes it :)

Saturday, October 18, 2008

The essence of senescence.

Things are starting to look a lot different around here.  Things are looking more...yellow. It's a good job that I think yellow is a very nice, happy colour because every vineyard around here is not so green anymore.  The grapevines have given up their crop for this vintage and are now shutting down for their long winter nap, a process called senescence.  A grape leaf lives for approximately 150 days and so the first to give up the ghost and fall to the ground is usually the first one that grew in the spring.  The vine, however, first removes any goodies it can from the leaves and stores what it can in it's root system.  This way it is assured a kick start in the spring when the ground begins to warm up again.  The correct colour sequence is green, then yellow and finally brown...and down, not the autumnal colours depicted on postcards all over the Napa Valley.  Red leaves mean the plant is virused and will eventually die.  I must confess that I love to see the horrified look on visitors faces when I tell them that.  My grandmother would have said that the 'divil' was in me.