Pest - BLACK VINE WEEVIL
The black vine weevil is a pest that can cause enormous damage in many ornamental crops. The larvae of the beetle are not easily controlled chemically: not only because they are hidden in the soil, but also because of their acquired resistance to many pesticides.
The black vine weevil goes through four stages of development: egg, larva, pupa, and adult. Adult black vine weevils are "walkers", i.e. they cannot fly. They are particularly active at night, and will go almost unnoticed during the daylight hours. The larvae live in the soil where pupation also takes place.
Both the adult weevil and the larvae damage plants. The adult weevil takes semi-circular bites from the edges of leaves, resulting in notching which decreases the ornamental value of the plant. The larvae, however, cause the most significant damage. Smaller larvae feed mainly on root hairs, while larger larvae feed on roots and the stem base. This greatly hinders growth, and eventually causes the plant to turn yellow and wither. One larva is enough to kill a plant if it girdles the base of the stem.
Biological control of the vine weevil is possible with the Koppert product listed below.
For more information, ask our expert
Products in blue are Garden/Greenhouse Accessories.
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