Wingspan of 34-44 mm. Forewings greyish-ochreous, veins pale lined with brown. A short black stripe basally in middle of wing. A white kidney shaped stigma is present and a white speck is present in the middle of the wing. Hindwings are white.
Larvae
Length of 35-40 mm when fully grown. Reddish grey with a yellowish shade between segments. A double, grey fine dorsal line present. Sub dorsal lines interrupted
and clearer towards the anal segments. Spiracles ringed with black.
Eggs
Laid in batches of up to 100 between leaf sheaths and stems. Eggs hatch in ca. 5 days.
Distribution
Europe, the Middle East, Africa, Asia and Oceania.
Economic Host(s)
Maize (Zea), wheat (Triticum), oats (Avena) and rice (Oryza)
Symptons/Signs
Leaves are skeletonized by young larvae while later instars will eat entire leaves and bore into hearts of wheat and barley. May also feed on flower spikes. Frass is conspicuous.
Generations
Up to 7
Monitoring
Adults Present
March-November (climate dependant)
Recommended Trap Density
2 traps per hectare in large uniform areas of crops and 3-4 traps per hectare in small, mixed or less dense crop stands.
Trap Maintenance
Check traps on a regular basis; at least twice a week. It is recommended to replace the pheromone dispensers every 4 weeks to achieve optimum results.
Replace sticky inserts, if used, when they become filled with dust or insects. with
Storage
Keep product away from heat and direct sunlight. Store in a refrigerator for a shelf life of 18 months or a freezer for an extended life of 24 months. Always store sealed in
original packaging.
