Grapes - Netting | Farm Stewards

Vineyard Netting

Using nets to cover fruit trees is an effective way to deter birds and some insect pests from eating or infecting fruit. It is reusable, chemical-free, and does not create the neighborhood disruption that can arise from using noisemakers

Don't leave it loose

Typically in many vineyards, drape nets are tossed over the vines to block birds from accessing the grapes. Excess netting is left pooled in between and at the ends of rows. Unfortunately, this loose netting can become a death trap for wildlife, and while most viticulturists probably wouldn't be too bothered by the death of a grape-stealing House Sparrow, there are dozens of other helpful or benign species who also get caught, some of which pose serious health and safety risks.

Loose pools of netting easily trap snakes, including rattlesnakes, who attempt to slide through the nets as they would a pile of leaves or brush. When they get entwined, they often cannot extract themselves as their overlapping scales make it difficult for them to move backwards. This creates a highly dangerous situation for the next vineyard worker who comes across it, as there is now a scared and pained snake who will likely attempt to bite anyone who attempts to help. Even non-venomous snakes such as Gophersnakes, can pack a painful punch with their bite. Snake extractions require professional help. Killing the snake does not help in the slightest, as snakes can reflexively bite (and inject venom) for hours after death. Also, killing any wildlife species including snakes, is illegal under the BC Wildlife Act and comes with steep financial penalty.

Loose netting can also trap birds of prey such as kestrels hunting in the vineyard; their sharp talons and beaks also pose a risk to anyone trying to disentangle them, and the fine threads of the netting often injure the legs or wings.

Installing bird-safe netting in the vineyard is especially critical when using integrated pest management protocols and encouraging the presence of insect-eating birds such as bluebirds and swallows.

Don't Leave It Loose!

Using different types of netting

While there pros and cons to all types of netting, the main criteria for snake-safe and bird/bat safe netting is that it is secured off the ground at all times and has a hole width of no larger than 5 mm. And while arguments can be made for white versus black versus coloured nets for wildlife, it is also true that the color of the nets can affect the fruit beneath it, so as long as nets are installed properly, the colour should have a negligable effect with respect to wildlife safety

Drape netting is the most likely to cause safety issues for wildlife and workers, as it is typically applied loosely and left on the ground. Leaves and twigs often poke through the mesh, eventually creating holes through which birds can get to the grapes

Drape netting still can be used effectively and safely, as long as the excess is tied up at the end of rows, and loose fabric is secured off the ground below the grapes

Side netting is a very safe option for wildlife. As it is applied only to the fruiting zone, there is no risk of snake entanglement and bird entanglement risk is low. Depending on installation, some side nets can be left in the vineyard all year, saving on installation costs.

Overhead netting and full vineyard enclosure is also an option, but is very expensive. Care must be taken to use a bird-safe mesh.

Using different nets

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Vineyard Netting