1- Mosquito verde (Empoasca lybica)
The green vine mosquito is an insect that bites the leaves until it reaches the vessels of the sap conduction that ends up clogging them and therefore drying the leaves from the outside to the inside.
When the leaves dry, the plant cannot perform its vital functions correctly and if the attack is very strong it can defoliate the entire vine stock.
2- What is the green vine mosquito? Description:
Adults are light green and about 3 mm. long.
They fly at the slightest movement and are located on the underside of the leaves.
Whitish-colored larvae until they undergo the first molt.
The nymph is similar to the adults, but smaller in size.
The eggs are white and elongated, deposited on the underside of the leaf.
3- What damage does it cause to the vine?
The insect bites the leaf veins to feed on the sap of the plant, so if the attack is large, it can weaken the plant.
It sucks the nerves of the leaves until it reaches conductive vessels from which it gets its food.
The direct damage located first in the leaves, manifested by sharp spots (red in the red varieties), causing the leaf roll on the undersides.
The margins of the leaves turn yellow , then turn brown and finally dry out.
If the damage is significant, it can cause premature defoliation , making it difficult for the wood to dry out and weakening the vine.
In the campaign following a strong attack by the green mosquito in the vineyard, there is a decrease in vigor in sprouting and a drop in the harvest.
The most serious damage occurs in summer (those caused by the second generation) as the weather is hot and dry.
The juvenile stages are more harmful than adults because being less mobile perform more intense attacks on the same sheet.
4- What criteria to use to carry out a phytosanitary treatment? When to treat?
Yellow plates can be used to detect the presence of adults during the sensitive culture stage (June to September).
To make the treatment decision , yellow chromotropic traps can be used to determine the population volume (the amount of green vine mosquito we have) and its action on the crop.
The presence of adults is observed on leaves that are easily appreciated when moving the vegetation.
Treat against the green mosquito when we find one larvae and one nymph per leaf.
5- Treatment . Fighting strategy and means of control
5.1.- Chemical Control: Insecticides for green mosquitoes.
The only effective means of control today is the chemical.
The currently recommended active ingredients are listed below:
When carrying out treatments against the cluster moth , the active ingredients that are effective against the green mosquito should be chosen.
You can buy any of the following green mosquito control products directly from Amazon:
5.2- Biological control: use of auxiliary fauna:
Normally, if insecticidal treatments have not been exceeded , the activity of predators and parasitoids is sufficient to keep green mosquito populations at low levels.
The mimárido hymenopteran Anagrus atomus is a parasitoid of the eggs of the green vine mosquito and other leafhoppers. They are present in crops of blackberry, hazelnut, dog rose, etc. so it would be interesting to plant around the vineyard.
The hymenopteran Stethynium triclavatum can also parasitize the eggs of this pest.