I'd be interested to see what that canopy looks like when fully developed. Seems like you've got a lot of buds close together there. I think it would be too dense for conditions here (north Portugal) where there's a lot of mildew pressure.
We have a fully developed canopy at the moment so I will try to include an update in the next video. I am interested, are the varieties you are referencing eating grapes or wine grape varieties? I believe the varieties grown for wine production in Portugal are many of the same varieties we grow in Tasmania. Thank you for your comment I appreciate it. Regards Matt
I am curious as to why the vines have been trained with overlapping cordons in this first place since it appears to be detrimental from multiple perspectives. What are the advantages?
That is a really good question. And there are a few reasons why we end up with overlap. In the majority of cases I deal with the percentage of overall overlapping canes is small. Due to yeild demands, a pre determined bud number per cane has already been decided prior to pruning operations and at times that will result in overlap and in short the time it would take to measure the canes when they are pruned is more expensive overall than dealing with the small percentage of overlap later on. I personally don't mind overlap for one reason, it gives me the chance to remove the weakest potentially less productive shoots because I can see the difference in strength between the shoots in areas of congestion. In my situation missing some overlapping canes is also ok because I favour a high water volume when applying fungicides this normally provides enough coverage and penetration for congestion to not really be an issue in most circumstances. Depending on the skill and experience of the pruning team avoiding overlap completely can be cost effective but it depends on particular circumstance. My apologies for rambling a bit, I hope I was able to answer your question
@@hakunamoscato5353 Thanks so much for the detailed response. The reason I asked is that I've taken over managing a small 3.5 acre vineyard planted in 2011. The previous manager trained the vines on a very low cordon (12 inches off the ground) VSP system and there are many places where they overlapped the cordons not only twice, but 3 times! As a result, the spurs are way too close, many have not been pruned close enough to the cordon and many have so many shoots they look like a spider web. It makes it difficult to manage the canopy, thin shoots, pull leaves and spray and is driving me crazy! I It's also promoting disease causing some of the cordons to die. We removed some of the excessive overlap this past spring, but I definitely need to devise a multi-year vine rejuvenation plan.
@@l0jack It sounds like your on a good track to fix the problems. A thin small canopy is sometimes harder to control diseases because it's more difficult to get the correct chemical amount on to the canopy. The chemicals are heavier than the water so if droplets start to form on the leaves you either end up with the chemical falling off the vine if the droplets fall. Or if they stay on the leaves the coverage is terrible because you end up with concentrated chemical droplets drying on the leaf instead of completely covering the surface area. Reducing the overall cane number will increase the vigour of your shoots and will make disease easier to control in the long run. But you are 100 percent correct it will be a long process. Changing nozzles and water volume on your sprayer until you get a combination that fives you the best coverage will help a lot in the short term.
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I'd be interested to see what that canopy looks like when fully developed. Seems like you've got a lot of buds close together there. I think it would be too dense for conditions here (north Portugal) where there's a lot of mildew pressure.
We have a fully developed canopy at the moment so I will try to include an update in the next video. I am interested, are the varieties you are referencing eating grapes or wine grape varieties? I believe the varieties grown for wine production in Portugal are many of the same varieties we grow in Tasmania.
Thank you for your comment I appreciate it. Regards Matt
I am curious as to why the vines have been trained with overlapping cordons in this first place since it appears to be detrimental from multiple perspectives. What are the advantages?
That is a really good question. And there are a few reasons why we end up with overlap. In the majority of cases I deal with the percentage of overall overlapping canes is small. Due to yeild demands, a pre determined bud number per cane has already been decided prior to pruning operations and at times that will result in overlap and in short the time it would take to measure the canes when they are pruned is more expensive overall than dealing with the small percentage of overlap later on.
I personally don't mind overlap for one reason, it gives me the chance to remove the weakest potentially less productive shoots because I can see the difference in strength between the shoots in areas of congestion.
In my situation missing some overlapping canes is also ok because I favour a high water volume when applying fungicides this normally provides enough coverage and penetration for congestion to not really be an issue in most circumstances.
Depending on the skill and experience of the pruning team avoiding overlap completely can be cost effective but it depends on particular circumstance.
My apologies for rambling a bit, I hope I was able to answer your question
@@hakunamoscato5353 Thanks so much for the detailed response. The reason I asked is that I've taken over managing a small 3.5 acre vineyard planted in 2011. The previous manager trained the vines on a very low cordon (12 inches off the ground) VSP system and there are many places where they overlapped the cordons not only twice, but 3 times! As a result, the spurs are way too close, many have not been pruned close enough to the cordon and many have so many shoots they look like a spider web. It makes it difficult to manage the canopy, thin shoots, pull leaves and spray and is driving me crazy! I It's also promoting disease causing some of the cordons to die. We removed some of the excessive overlap this past spring, but I definitely need to devise a multi-year vine rejuvenation plan.
@@l0jack It sounds like your on a good track to fix the problems. A thin small canopy is sometimes harder to control diseases because it's more difficult to get the correct chemical amount on to the canopy. The chemicals are heavier than the water so if droplets start to form on the leaves you either end up with the chemical falling off the vine if the droplets fall. Or if they stay on the leaves the coverage is terrible because you end up with concentrated chemical droplets drying on the leaf instead of completely covering the surface area. Reducing the overall cane number will increase the vigour of your shoots and will make disease easier to control in the long run. But you are 100 percent correct it will be a long process. Changing nozzles and water volume on your sprayer until you get a combination that fives you the best coverage will help a lot in the short term.