Tritrophic interactions of nineteen canola cultivars- Chromatomyia horticola - parasitoids in Ardabil region

Abstract :

The leafminer, Chromatomyia horticola (Goureau) (Diptera: Agromyzidae), is one of the most important pest of canola, Brassica napus L., crop in Ardabil region. In this research, the parasitoid species of the leafminer larvae were collected and identified in the experimental field of canola in the University of Mohaghegh Ardabili during 2008 and 2009. Then the percentage of abundance of each of parasitoid species was determined in the experimental field. In 2008 and 2009, Diglyphus isaea (Walker) had the highest abundance (48.3% and 42.8%, respectively) and Chrysocharis pubichornis (Zetterstedt), Dacnusa sibirica Telenga and Pediobius sp. had lower abundance, respectively. Also, the density of larvae and the percentage of parasitized larvae were determined on nineteen canola cultivars in the experimental field. The density of larvae was lower on Opera, Hyola401 and RGS003 than on the other tested cultivars during 2008 and 2009. The percentage of parasitized larvae on Opera, hyola401 and RGS003 was significantly higher than on the other tested cultivars. Therefore, it could be concluded that using of Opera, Hyola401 and RGS003 cultivars might be increased the efficiency of parasitoids in control of the larvae of C. horticola

Keyword :

Chromatomyia horticola, parasitoid, identification, canola cultivars, interaction, Ardabil

Author(s) : Fathi, S. A. A.
Downloads : 1946
Published Issue : 2011 Vol. 6 Number 1

2011 Vol. 6 Number 1