Green Oak Moth

Tortrix viridana, Green Oak Moth


Tortrix viridana, Green oak moth is an economic insect of oak. It is also known as the European oak leaf roller and tortrix moth. It is a distinctive green moth whose larvae feed on tree leaves of Quercus (main host), Acer, Betula, Carpinus, Fagus and Populus. They also feed on shrubs including Vaccinium and Urtica. It is distributed in Europe, northern Africa, Cyprus, Iran and Israel. An infestation of the larvae can defoliate an oak tree.

Russell IPM manufacture and supply pheromone lures, traps and complete monitoring systems for Tortrix viridana, Green Oak moth. Pheromone trap data gives early warning of the infestation and also exhibits the density of the insect population.

OVERVIEW

Adult moth’s forewings are pale-green or yellow-green; hind wings are brownish-gray to grayish; both wings have a white, frayed outer edge. The wingspan is approximately 18 to 23 mm. The head is yellowish and adults have a grayish, 8 mm long abdomen. Larva: Younger larvae are gray coloured with dark heads. Older instar larvae turn gray-green. Larvae are 15 to 19 mm long and 2.5 mm wide. Egg: Eggs are round, with a diameter of about 0.7 mm. They are initially light yellow, later changing to brown. Each female oviposits approximately 50 to 60 eggs in pairs within a cement-like mass. Eggs are deposited on branches, leaves, and branch forks, within the entire crown. A dust and algae lining make the eggs nearly invisible.

Research & Development

Trap application guidelines

Do not re-use the trap to monitor different insects as this may lead to mixed catches. One trap for every two hectares of large scale fields of homogenous lands.

Find out more about the Delta trap

Monitoring

Lures for pest monitoring

Lures

Lures can be changed every 4-6 weeks to get the most accurate results.

Lures handling

Pheromone lures are a very sensitive tool. They can be affected by exposure to elevated heat and direct sunshine. Direct touching by hand may cause cross contamination leading to mixed catches in the trap. Some contaminants such as Nicotine May have repellent effect reducing trap catch.

Lure Storage

Store in a cool dry place.

Shelf life can vary from 3-36 months depending on the storage temperature.

See Technical Data Sheet for further details.

Find out about the Qure

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