Pests That Can Destroy Your Grapes
Saturday, February 12th, 2011
Growing grapes can be a fun and rewarding hobby or a profitable business. But there is a learning curve – you need to learn all about the various aspects of growing grapes; from the types of grapes to grow to how to care for them and everything in between. One of the most important thing to learn is how to defend against grape pests, especially insects, that can totally destroy your crop in very short time.
The following are just a few pests that attack the vineyards of the world. Some of these pests may not be found in your area, however, as a grape farmer, it’s a good idea to know about them as well.
Grape Phylloxera
This insects is very tiny like an aphid and can attack either the roots or the leaves. The main sign of its appearance are the tiny abnormal growths known as galls that form either on the leaves or of the roots, which may not affect the health of the fruit, but adversely impact the affected area.
These grape pests set off a chain of events that can ruin the crop. Since the grape plant can lose all or most of it’s leaves as a result of these bugs, it can delay or severely reduce the amount of fruit you get, thus reducing your harvest.
To avoid these problems, a regular inspection of your plants for any galls is required. If you common experience phylloxera infestations, you might want to treat your plants with insecticide. Carbaryl is the most popular insecticide for grapes. .
Japanese Beetles
Japanese beetles are versatile pests in that it is not only grapes that are attacked by these insects but also nearly 300 other species of fruits, vegetables and crops. A Japanese beetle is very easy to spot since it looks so distinct. It is metallic green in color with copper brown wings.
Grape plants are usually fairly resistant to these insects as long as they remain in limited numbers. However, in large numbers they can cause severe loss of leaves and lots of damage as a result. Be sure to inspect your grape crop at least two times a week looking for these pests. If you see them, pick them off by hand. You might also use insecticide such as Permethrin sparingly in spots with heavy infestation.
Grape Berry Moth
This is one of the grape pests that attack the berries. The larvae of the grape berry moth appear creamy white in color, while the adult is a mottled brown with a bluish-gray band found in the interior of the fore wings.
It is not the adult grape berry moth that concerns farmers the most but the larva since it feeds directly on the berry. Add in the fact that larva also serve as contaminants and there is even more reason to worry.
Injured berries are usually removed by hand while prevention measures include destroying the dead leaves. Insecticidal applications may be necessary to control the two generations of moths that live in a year.
As you learn more about how to grow grapes, you will come across many other grape pests like the multicolored Asian lady beetle and the yellow jackets. Become educated with regards to the different pests that exist in your area and the best means to prevent them.
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