South African Cossid Moth Lure

Latin Name:  Coryphodema tristis

Lure: Red Rubber Septum.

Lure Active Ingredient: E9-14Ac and Z9-14Ac

Field Life: 30 days

Trap to Use: Green or Multi-color Uni Trap

Monitoring Strategy: Check with Cooperative Extension or Master Gardener for local information and recommendations.

Cultural and Physical Control: Debark or wholly remove infested trees to prevent the next generation from propagating as much as possible. Less severe infestations, such as those to branches, may be controlled by excising and incinerating the aforementioned infested branches.

Distribution: Botswana & South Africa

Hosts: Various Species, including those of the Quince, White Mangrove, Mallow, Rose, Elm and Zelkova families, and species of grapevine and creeper.

Description: Adults: Wingspan is 25-50 mm. Body is grayish brown in color, the front wings are mottled brown and hindwings are mottled light gray.

Larvae: 30-40 mm long when fully grown. Brown head and light yellowish body with red spots at maturity.

Eggs: About 1 mm in length, oval in shape and with a dull-cream-colored body

Life Cycle: Adult female cossid moths lay eggs on the bark of trees, usually in a sheltered place such as cracks in the bark. Upon emergence, larvae bore through bark and feed on the cambium. As the larvae grow, they bore into the wood, where they cause extensive tunneling. The larvae feeding in the cambium and the extensive tunneling in the sapwood and heartwood results in severe damage to trees, which often also die. Both the main trunks and branches are attacked. Trees from five to fourteen years old have been infested, but it is likely that the cossid will infest both younger and older trees, provided the diameters of the trunks / branches are sufficient to enable the larvae to feed. Pupation occurs in pupal cocoons constructed inside the larval tunnels. Just prior to adult emergence, the pupae cut themselves out of the cocoons and wriggle towards the tunnel openings until their bodies project halfway out the tree. The life cycle lasts approximately two years, with one generation occurring in that span of time.

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