Showing posts with label pest management. Show all posts
Showing posts with label pest management. Show all posts

Sunday, August 23, 2015

Let go of my grapes!

Today I spent a bit of time performing various vineyard operations; training baby vines up stakes, clearing weeds from the bases of some vines and pulling leaves (and laterals) in the fruit zone.  Just as I was about to remove what I thought was a crumpled up, dead Syrah leaf I realised, right as I was about to grab it, that it was a rather large moth. At about 3.5 inches wide it is the biggest moth I have ever seen.
The Achemon sphinx moth (Eumorpha Achemon) is an occasional California vineyard pest as it is quite fond of feeding on wild and cultivated Vitis species.  The adult moths are rarely seen as they fly only at night and usually hide during the day.  Achemon caterpillars are rapacious feeders and can consume 9 Vitis leaves in a 24 hour period. Great!  Not exactly the type of leaf removal I was planning on.  I haven't spotted any naked vines thus far, so I think Vinoland is safe - for now.

Sunday, June 27, 2010

Ladybirds welcome.

Vinoland is teeming with ladybirds right now. They can be found out in the vineyard in each of their four stages of development; from eggs, to larvae, to pupal stage (shown above), finally emerging as cheerfully enrobed adults. Hippodamia convergens, commonly known as the convergent lady beetle, is the native ladybird species in this part of northern California. I am very happy to see them in such abundant numbers, it means that our vineyard is a healthy and thriving mini eco-system. The fauna living on the vineyard floor, and up in the canopy, are numerous and diversified.
Some alarmist folks warn of the possible problem of ladybird taint, (certain unpleasant volatile compounds that impair the taste or bouquet of a finished wine), if there are a sufficient number of the insects on winegrapes when they are being processed. In more than a decade of witnessing ton after ton of grapes being processed I can't say I am overly concerned with what would be an extremely rare phenomenon. Lots of spiders and earwigs, that unfortunately do not live to tell their tale, but no ladybirds.

Thursday, June 17, 2010

Wrong time and place.

Oh dear! This poor baby barn owl has somehow managed to become separated from his/her mother. From sitting on the tyre of our neighbour's truck, the owlet has flapped, fluttered, and hopped into an old wood pile where it may be safe, but for the fact that there is a hawk and a crow shadowing the fledgling's every move. I was sitting here trying to decide whether or not I should attempt to capture it and take it to the local wildlife centre. But then I came across a website that said baby owls quite frequently fall out of their nests and look helpless but are infact well equipped to look after themselves in these situations. So, I have decided to let nature take it's course.
Vinomaker and I for the past several weeks, have been enjoying a glass of wine on the deck every evening at dusk, with the express intent of spotting the pair of barn owls who leave, from the exact same direction each night, on their hunting trips. We have been rewarded with low flybys over the vineyard and even one owl that alighted upon the rollbar of the tractor and glared down the vine rows.
I love barn owls and I hope this particular little guy/gal survives to one day hunt down all of Vinoland's gophers.

Tuesday, May 25, 2010

And the great heron feeds.

Last seen flying out of the Far Niente vineyard with a gopher in it's beak, this Great Blue Heron (Ardea herodias) gave the Vinodogs a bit of a fright on our walk this afternoon. Their start probably had more to do with a missed gopher snack of their own than the sight of a 4ft tall bird about 10 feet above their heads. Mr. Heron is currently perched in an oak tree on the periphery of Vinoland eyeing the multitude of gopher mounds in the vineyard as if deciding which one houses this evening's supper. I hope he's hungry and takes two, or more.
And to think Vinomaker and I installed owl boxes for rodent control, maybe we needn't have bothered.

Saturday, January 17, 2009

Micro Pest Management.

Look at this cutie pie, a baby ring-necked snake (Diadophis punctatus).  I was sweeping up leaves this morning, when I found this baby hanging out in the damp edges of our Orange muscat planting. I wish I could have captured a shot of his/her tongue flicking in and out, giving me a good sniff. So cute, but yet so useful. I deposited him/her safely, under the leaves at the base of one of the vines, out of harms way. After all, I want this baby to reach adulthood and be the 30 inch long, slug eating predator it has the potential to be.
Godspeed little one...just leave my favourite lizards alone!

Friday, January 09, 2009

Vine Land Security.

It's still going to be winter for quite a while yet. Perhaps less so in California than other parts of the world, I admit, but it seems almost spring like this morning.
The local red-shouldered hawk, (Buteo lineatus), population seems to be out in full force today. A pair has spent the morning hunting in our vineyard, hopefully successful in partaking of a fresh, juicy breakfast of Pocket Gopher. Others flew overhead, their voices loud in warning, for whatever reason, to the ever circling Turkey Vultures, (Cathartes aura). These super ugly birds, by the way, drive the Vinodogs crazy. Not hawks, not crows, just vultures.
Gophers are responsible for the death of many a vine in the vineyard. They nibble their way through the roots which eventually causes the vine to die. Then they move on to the next vine!!! In her day V1 used to do a pretty good job of keeping the rodent inhabitants of our little part of Napa in check. In her prime she was very adept at dispatching the little devils in two quick chomps. However she has slowed up of late and Vinomaker and I have had to employ other means of 'pest management'.
Owl boxes are one approach, so we have several strategically dotted around the property. Alas, as of yet we have no occupants. I don't understand why, they are really nice boxes made by a friend, the view is fabulous and the rent is free...meals included.