Investigation on Spodoptera spp. (Lep., Noctuidae) and its population fluctuation using phero-traps in beetroot farms of Isfahan region

Subject Areas : entomology and othea arthropods

E. Danyalzadeh ¹ , A. Avand-Faghih ² , H. Farazmand ³ , J. Karimzadeh ⁴

1 - Department of Entomology, Agricultural Faculty, Islamic Azad University, Arak, Iran
2 - Department of Agricultural Entomology, Iranian Research Institute of Plant Protection, Tehran, Iran
3 - Department of Agricultural Entomology, Iranian Research Institute of Plant Protection, Tehran, Iran
4 - Department of Plant Protection Research, Isfahan Research Center for Agriculture and Natural Resources, Isfahan, Iran

Received: 2011-11-11 Accepted : 2012-11-11 Published : 2012-11-21

Keywords:

Abstract :

S.exigua, S. litura and S. littoralis with a wide host range are the most important pests of beet. spread all over the word while two other species S. littoralis and S. litura are more limited. Spread seasonal fluctuations of these species population along the growing season were studied by green funnel traps that were bated by sexual pheromone in a beet farm near Esfahan in 2010. S. exigua and S. littoralis were captured in traps but S. litura was not captured in pheromone traps because S. exigua and S. littoralis are similar concerning their molecules and their proportion. From mid-October as the weather gets cold, it reduced to the least. The average of trapped of S. littoralis was low till August and almost was fixed and any max or min was not observed. But trapped pests increased from 9Th September and it became maximum in mid-October. Results showed that the time of activation of these species were different in that the population of S. exigua was more than S. littoralis in the beginning of growing season of beet till late summer. But in the end of growing season means the population of S. littoralis was increase in late summer till autumn and over numbered to S. exigua population.