Pheromone Monitoring Lure for Cameraria ohridella, the Horse Chestnut Leaf Miner
The Horse Chestnut Leaf Miner is a tiny brown moth, (wingspan 6 – 8 mm). Females lay eggs on the leaves and the larvae make mines or tunnels in the leaf tissue about 1-2 mm long which turns the leaves brown in mid-season causing them to drop off prematurely. The stress on the trees may kill them and at best the trees become extremely unsightly. The pest was first recorded in Macedonia in 1985 near Lake Ohrid. It was described as a new species of the genus Cameraria by Deschka and Dimic (1986). It spread to Austria by 1989 and rapidly moved east and west, reaching Paris in 2000 and London by 2002.
Available singly, price discounts for bulk orders. Prices on application.
Description
Lifecycle of the Horse Chestnut Leaf-miner
There can be up 5 generations of Cameraria per year. Adult moths appear from April onwards. They emerge in the early morning and fly to the tree trunks where they mate. From May to August eggs are laid along or near the lateral veins of the leaves on the upper epidermis. A female can produce on average 20-40 eggs. The eggs hatch after approx. 2 and 3 weeks. The larvae go through 5 stages of development, which takes up to 4 weeks to complete. During this time they feed on the inside of the leaves but the upper and lower epidermis remains intact. Pupae develop in a silken cocoon for approximately 2 weeks before they are fully developed however, the over-wintering generation can remain at this stage for 6 or 7 months. They are known to be very hardy and can withstand extreme cold and frost conditions. It is possible that the mines may be confused with a brown leaf mould or damage caused by salt. To be certain, the leaf should be held up to the light. If it is a Horse Chestnut Leaf Miner burrow, it will be possible to identify a larva, chrysalis, or at least larval frass.
Directions for Use
Funnel traps are recommended for Horsechestnut Leaf Miner. Place lure in basket and attach to underside of lid. Fill the base with a mix of water and detergent and hang in affected trees early in the year. Lures can be changed as necessary during the season. The base of the funnel trap can be removed easily to dispose of captured moths. Glue tree bands can also be placed around the trunks, stems and branches of trees to stop insects moving along the tree bark surface once they have emerged from the leaf litter.
Storage Instructions
This product is sealed in impermeable packaging for storage and shipping. Keep product away from direct sunlight, heat, sparks and open flame. The dispensers and systems should be kept under good storage conditions at below 15°C when the dispensers will retain their activity and attraction for a minimum of 18 months. Bulk storage of dispensers for periods of up to 24 months is possible by refrigeration at temperatures of 4°C or below. Keep dispensers inside their sealed packaging until use. When replaced, the old dispenser should be completely removed from the area of use and destroyed to prevent interference with the fresh replacement/ recharge dispenser.
| Latin Name | Cameraria ohridella |
|---|---|
| Common Name | Horse Chestnut Leaf Miner |
| Pheromone Active | E-8, Z-10-tetradecadienal |
| Dispenser | Natural Rubber Septa |
| Active Life | 4–6 weeks (temperature dependent) |
| Packaging | Individually sachet packed |
| Sachet Material | Foil Lined Laminate |
| Shelf Life | Up to 2 years when stored in cool, dry conditions |
| Recommended Trap | Funnel Trap |
