Faramarz HARIRI MOGHADAM1*, Jafar KHALGHANI1, Saeid MOHARRAMIPOUR2, Babak GHARALI3 and Mehrzad MOSTASHARI MOHASSES3
1Department of Entomology, Science and Research Branch, Faculty of Agriculture, Islamic Azad University, Tehran, IRAN
2Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, IRAN
3Agriculture and Natural Resources Research and Education Center of Qazvin Province, Qazvin, IRAN
*Corresponding author: Fhmoghadam@gmail.com, Tel: +989127852004
Abstract. Sugar beet weevil, Lixus incanescens Boh., is one of most dangerous pests in sugar beet. Host plant resistance is known as an efficient strategy for pest management. Thus, this study was conducted to investigate the antibiosis resistance induced by zinc element in different cultivars of sugar beet to long snout weevil, L. incanescens. Seeds of eleven commercial monogerm cultivars of sugar beet including Pars, Torbat, Ekbatan, SBSI019, Rizofort, Puma, Dorothea, Brigita, Pecora, Nagano and Jolgeh, were studied. Field was divided to two parts; one part was treated with zinc fertilizer and other part did not treat with fertilizer. Antibiosis parameters were tested. Results clearly did not show that cultivars have antibiosis resistance under non–using fertilizer during 2013 and 2014 years. Rizofort cultivar showed lower susceptibility compared with other cultivars when using zinc fertilizer, because of lower adult weight, female longevity and period length of immature stage during the both years. Thus, Rizofort cultivar was relatively resistant to L. incanescens when using zinc fertilizer during the both years, which can be useful in the development of IPM programs for this insect in sugar beet fields
Keyword: Lixus incanescens, antibiosis, sugar beet, zinc fertilizer.