Bioecology of European corn borer, Ostrinia nubilalis in North and North west of Iran.
2007
Basiri, Gholamhosein | Taghizadeh, M. | Espahbodinia, A. | Amirmoafi, M.
In a 2-year investigation (2004-2005), bioecology of European corn rer(ECB) was studied in North (Dasht-e Naz Sarie) and North west (Dasht-e moughan, Ardebil) of Iran. Results revealed that the pest was indigenous in these regions, and had three generations per year.The first generation is build up in winter wheat, while the second and third generations occur in corn fields.Life-span of the pest were 47 and 40-45 days in Dasht-e Naz and Dasht-e Moughan respectively. Investigation on temporal and spatial distribution of egg masses of the pest showed that ECB had an oviposition peak in each generation,and females laid their eggs underside of corn leaves of the middle part of corn plant, near the cron ears (cobs). Immature stages of ECB were attacked by natural enemies. Trichogramma brassicae parasitized egg masses of the pest, and Braconid wasp, Habrobracon hebetor attacked the pest larvae inside the corn stalks. Besides corn, ECB also attacked cotton , sugarbeet, and sorghum. About thirteen species of gramineous and broadleaf weeds were distinguished as ECB alternative hosts. Viability of ECB eggs was 87.8 %.
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