This is an amazing video that makes allot of sense.  Maybe if some you can try this out to see if you can stop Japanese beetles from attacking your grape vines.

Would love to hear your comments!

Take care

Danie

Adult Japanese Beetle

The Japanese beetle (Popillia japonica, also known as the jitterbug) is one of the most visible and most destructive feeders of grape vine foliage out there. 

The Japanese beetle attacks most green parts of the grape vine, but mostly feeds on young leaves in the upper part of the canopy.  Occasionally, they will feed on fruit also, making it unusable for export or table grapes. 

When Japanese beetles feed on the leaves of the grape vine, they will eat the foliage surface material between the veins, leaving only the veins in place, which will look like they were skeletonized.  Although mature, vigorous growing grape vines can tolerate quite a bit of defoliation, this insect can cause some serious damage to a grape crop. 

The life cycle of the Japanese beetle:

Japanese beetles overwinter as larvae in the soil.  They will feed on the roots of grass and other plant material.  Adult beetles will become visible in late spring and may be present in vineyards until mid in summer.  The adult Japanese beetle (as seen in the picture), has a distinctive, shiny green body and head, with copper-coloured wings.  The sides and back of the body is covered with small white hair.  The female Japanese beetle is bigger than the male and is approximately ½ inch long.

After mating, the female Japanese beetle will temporarily leave the grape vine, to lay up to sixty eggs in the soil of your vineyard or if you have a backyard vineyard, in your lawn.   In midsummer, the eggs will hatch and will reveal small, white grubs or larva, where they will feed and hide up to 8 inches deep into the soil, to wait out the cold of winter.

Japanese beetle control:

Strange enough, in Japan, where the Japanese beetle originally comes from, this insect is not a big problem!  Why?  The answer is; natural enemies that feed on the grubs. 

For the organic grape grower, you can control Japanese beetle by putting out traps with a pheromone that attracts the female and a floral lure, that will attract the male.  The disadvantage of using these traps are that you can lure more Japanese beetles to your vineyard, as they can fly quite long distances in a short amount of time.

A program with physical and biological control of the grabs is a more effective method of controlling Japanese beetle.  The two nematodes that are most effective against Japanese beetle grubs are Steinernema glaseri and Heterorhabditis bacteriophora.  Both these nematodes are commercially available.

Milky Spore (Bacillus popilliae), a naturally occurring host specific bacterium, will also attack the destructive white grubs.

Important:  If you are to use chemicals to treat Japanese beetle, then spot treatments with botanical insecticides is advisable.  Unfortunately, these chemicals also kill the biological nematodes that help control Japanese beetle.  In other words; keep chemical treatments to the minimum.  Products like Carbaryl, Malathion, Methoxychlor, Rotenone can be used on adults and Merit (turf), Marathon, Bendiocarb can be used to control grubs.  Make sure these products are registered in your country or state before you use them and PLEASE, read the labels of the products BEFORE you use them.

You have prepared your site; you have decided what variety to grow; now it is time to plant your grape vine! Well, unfortunately, this is where many home grape growers terribly fail!

Planting a grape vine is not hard, if fact, it is one of the easiest fruits to get started, but there are a few key things to remember when planting your grape vine.

1. The planting hole

In the early days, before research proofed this method wrong, planting grape vines, by adding fertilizer and all kinds of stuff into the planting hole, was a well-known practice? Research showed, that a grape vine sprouts from energy within the vine itself, and do not actually use any fertilizer until the vine reach about 2 to 3 inch shoot length. By adding fertilizer directly into the planting hole, or directly on the roots of the vines could damage (scourge) the roots.

With knowledge/information you gained from soil samples, you should fertilize and correct all mineral shortages BEFORE you prepare your vineyard site and then plant your grape vine. This will mix all the fertilizer with the soil and will not damage the roots of your grape vine.

Make a large enough hole to accommodate all the roots from the cutting and do not cut or remove any roots – the more roots, the better the chance of successfully planting your grape vine.

2. Preparing the new vine before planting

Before planting your grape vine, you should plunge the complete vine into a bucket of water for at least six hours. Under no circumstances, let the roots of the vine dry out – this is very important! If you are planting a few hundred vines, cover the vines not planted yet with a damp gunny bag or something similar.

3. Watering the vine

Before you plant the grape vine, you should thoroughly water the planting hole and ensure that the water deeply penetrates the sidewall of the planting hole.

Constantly add water to the planting hole while filling the hole with soil, to ensure that no air pockets forms near the roots of the vines. Water your grape vine once a week for at least a month after planting the grape vine.

Following these simple rules when planting a grape vine, will guarantee a much higher success rate.

I received this email from Casey yesterday, and would like to share it with you…..

Danie,
Let me first say that I absolutely love your book (The Complete Grape Growers Guide), and I want to express how helpful it was in starting my first few vines. The information was very a relief as many other books I’ve read lacked the quality information about pruning. Following your instruction I was able to get my vines on track and they were growing very well.

Unfortunately, I’ve had a run in with a few deer that really took a lot of my vines out. The deer proceeded to eat all of the leaves on my main shoot and they’ve nearly stopped growing completely. I was wondering what my plan of attack should be next, should I choose a new shoot to train or should I wait for a new growing point to start on the main shoot I have now.

I would like to express my thanks to you again, as some of my vines have already reached the bottom wire on my trellis, and I have another month or two left in the growing season!!

Thanks again.
Casey

Hi grape growing friends,

I received this email from John and Randi, so I decided to reply to their email on my blog so everybody can have a look at it.

Here’s the email:

What to do about the new growth? I think about 20 bunches/plant is recommended, under the best circumstances, either red or white varieties. Do I pinch back the new growth at the mature stem, pinch back below the lowest bunch (I assume the plant needs leaves to produce nutrients for the grapes), let the new growth continue – removing only the bunch buds: how to balance roots with fruits?

OK here we go …

Although John and Randi didn’t mention the age of their grape vines in the email, I assume it is mature vines. New growth on a grape vine is easily managed by starting to remove water shoots.

Water shoots (as I call them) are shoots that develop from the old parts (arms and stems) of the grape vine – older than 2 years. These shoots normally do not produce grapes and only compact the vine and prevent proper sunlight penetration and air flow. Although water shoots can be used to renew a cordon (arm) when a cordon dies or become unfruitful, they are normally useless on a grape vine and should be removed.

Determining the crop size you want on your grape vines beforehand, is important and you should experiment with your own vines to see what the best load for optimum quality is.

Depending on how strong your grape vines are and off course the trellis system you use, 20 bunches per vine (like in the email from John and Randy) is okay, but with a well developed grape vine structure, good exposure to sunlight, correct bunch sizes and proper canopy management during summer, I succeeded in ripening up to 32 bunches per vine.

Some “grape growers/consultants” might tell you that this kind of crop sizes will result in lower quality grapes. Yes, that is true IF you do not look after your vine. I successfully prepare and pack grapes crops of this size year after year.

Now you might think: “What a windbag this guy is?” No, actually I’m no windbag, in fact I’m a rather quiet guy!

I’m telling you this because it is possible to grow grapes that produce that kind crop sizes. By removing all unnecessary shoots on the grape vine before flowering and even by reducing the number of flower-clusters at that stage, will unbelievably improve the quality of your grapes.

Like I said, decide on the crop size and count the number of bunches before flowering starts. Here is the formula I normally use.

Say for instance I decide on a crop size of 30 bunches per vine, I then ad 60% to that number

30 bunches + 60% = 48 bunches per vine (the rest will be removed after fruitset, when you will be able to choose the 30 best bunches from the total)

If I have say 70 bunches on the vine at that stage (which is possible!), I will remove 22 of those bunches. I start by removing inferior shoot, even if they have bunches on them. I remove all double shoot that developed from the same bud (remember that a bud on a grape vine is actually 3 buds combined) and then I remove individual clusters from shoot that produced more than one cluster per shoot.

KEEP ON COUNTING THE GRAPE CLUSTERS AS YOU PROCEED!

Once I’ve reached 48 clusters, the grape vine is now ready to go into flowering.

You see my friend …

By removing unnecessary clusters before flowering, the vine is under much less stress – when the clusters start flowering, the grape vine is under an enormous amount of stress.

I never remove leaves at that stage. Rather leave the grape vine until after fruit set and then remove leaves. If you feel that some of the shoots is growing out of control, you can set them back by removing the growing point of those shoots.

I tried to explain this in simple terms, so I hope this will help you grow your grape vine the correct way.

Good luck and if you have any questions, just add a comment below this post.

Take care

Danie

The Grape Guy

For any wine enthusiast wine is more than just a liquor, it is a valuable beverage that triggers a certain chemistry and plays a fundamental role not just from the commercial point of view but intellectually, universally and socially speaking. The very history of wine is dating back to times when only the most well educated and wealthy people enjoyed it plentifully.

However, a wine enthusiast found among the poor and the illiterate was not rare either, as the pleasure of this sense stimulant is widely applicable to anyone, regardless of personal and social status. Presently, wine relates to so many areas that it is almost impossible to exhaust it as an object of study.

First and foremost, wine has a chemical composition that makes it the perfect accompaniment for food: fatty dishes would not be the same without the mild acidity and the taste contrast that wine creates. You don’t have to be a passioned wine enthusiast to actually be aware of the way it complements the taste of food.

Furthermore, since meals are often a pretext for social interaction, wine is often the bond or the missing link in faulty communication. It relaxes the mind, eliminates the tension and stimulates creativity. Any wine enthusiast knows that as long as drinking remains rational, the pleasure is maximum.

The taste buds are the ones to sense the pleasant sensations triggered by wine and the combination of sweetness and acidity is the balance on which wine quality actually relies. It is not seldom that a wine enthusiast is happy to discover some fruity flavor in the liquor; usually such flavors contribute to the sweetness of the wine, depending on the general characteristics of the fruit that create them. Rich dimensions can be found in wine owing to the possibility to combine the taste of grapes with that of certain other fruits like pears, strawberries, elderberries and the like.

If for an amateur it is difficult to tell how white and red wine varieties are created, a wine enthusiast will most certainly know the difference. If red wine is made by the fermentation of the entire grapes, the white wine is the fermentation product of grape juice only: there is no fruit meat or skins left to the composition. Such knowledge may seem basic, but there are lots of other details that a wine enthusiast will share with others, since the topic is so wide and comprehensive that it could not be covered easily.

Take care
Danie
The Grape Guy
www.my-grape-vine.com

Because we cannot see the roots of the grape vine without digging into the soil, many grape growers often make the mistake of not ensuring a well balanced, properly formed root system of the grape vine.

Tests have shown that a grape vine with well developed and well distributed root system contains lots of fine roots. These fine roots are responsible for the uptake of food and water, which will ensure a well developed canopy throughout the season. It is a known fact that for a good eating quality grape or a good quality grape for wine, active growth during the ripening of the grapes is essential.

A grape vine with an underdeveloped root system, especially fine roots, has a poor buffer capacity against unfavorable conditions, like drought, heat waves and even unwanted rain. The absence of these fine roots will result in less young leaves to form or develop throughout the season.

There must be a proper balance between old and newly formed leaves on a grape vine, because young leaves continue to feed the grapes and the root system of the vine. When an imbalance occurs, the grape vine goes into “stress” and will not be able to sustain the composition of the grapes during the later stages of ripening.

In short; the root quality and quantity of a grape vine is essential for good quality grapes, therefore proper soil preparation and the correct chemical substance of the soil must be determined and corrected before you plant the grape vines.

Without any doubt, there is a direct correlation between the canopy development and quality of the root system and in the end the quality of the grapes and wine.

Ensuring a proper root system, will make canopy management easier and your grape vines will not easily go into “stress” when unwanted climate and external conditions occur.

Have a grape day!
Danie
“Author of the Complete Grape Growers Guide”

Hi Grape Friends.

Hope you had a wonderful festive season and that 2008 will be a great grape growing year for you.

In this post, I would like to talk about birds damaging (eating) your grapes. If you are like me, a true nature person, fond of all wild animals (birds included), it is hard not to hate these feathered friends when you are a serious grape grower.

All over the world, grape growers have problems with birds ruining grape crops and the extent of damage to crops, caused by birds of varying types is often significant. Birds damage grape crops by either pecking or consuming whole grapes from bunches.

The former feeding method causes secondary spoilage as bacteria, moulds and insects attack the damaged berries, which may ruin an entire bunch , like in the picture below. Further more, in the table grape industry, which is my speciality by the way, grape bunch appearance is an important feature of the produce and even minimal feeding by birds cause cosmetic damage, making the fruit unsuitable for the export market.

Secondary infection because of bird damage

Now the Million Dollar Question is: “How can you prevent birds from damaging your grape cop?”

Studies showed that strategies to try and eliminate birds species, that damage grape crops have a poor record of success and the fact that environmental consciousness is on everybody’s mind these days (as it should be), makes killing these birds not an option anymore.

There are a few methods, you as a grape grower, can use to try to reduce damage to grape crops.

1. Bird Netting

Grape growers use bird netting to drape the grape vines with a special net developed to keep out birds. Although bird netting give some sort of protection, it is not fool proof. Draping the netting over grape vines is a time consuming job and no mechanical manipulations (like mechanical harvesting) can be done before the netting is removed again.

2. Propane Gas Cannon

The Propane Gas Cannon is a bird scarer, controlled by an electronic timer and 12V battery and create periodic load explosions in an effort to scare birds from the vineyards. These Cannons are quite costly and should be placed at strategic places throughout the vineyard. Some grape growers where I live tried to use these cannons, but it seems like birds become acclimated in time to new sounds introduced into the vineyard and tend to ignore the cannon shots after a while.

3 Visual Repellents

I’ve seen grape growers use shiny streamers and other shiny and fluttering objects like small mirrors hanging from strings, to repel birds, but as with the propane gas cannon, birds acclimate to these objects quickly. Some grape growers stretch plastic strings over the vineyard and these strings will vibrate in the wind and make a low irritation sound that could (notice I said “could”) repel unwanted birds.

4. Chemical Repellents

No proven chemical repellent (to my knowledge) has been successfully used in vineyards. Normally, the grapes are almost ready for harvest and applying chemicals to the grapes, could lead to artificial flavour to grapes and in the end to the wine – and it could be dangerous to humans! I do not recommend this!

In the end, there isn’t much else we can do – sadly. As my dad always say: “Danie, always remember, you planted the rows on the sides of the vineyard for the birds and grape thieves to eat!” 🙂 LOL , thanks Dad, maybe I should design a vineyard without any side rows!

Hope you enjoyed the post, try some of these methods, even if they work only for a week or two – it could just be enough to save some of your grapes.

Have a great day

Danie

Hi grape growers.

Can you believe that it’s Christmas again. Last year, the same time, we were a small community of grape growers, but since then grew exponentially!

Thanks for being part of the My-Grape-Vine experience.

A merry Christmas and lots of blessings to you.

Danie
The Grape Guy

Hi Grape Viners.