Naslov
Western corn rootworm and European corn borer important pests of maize in Croatia

Autori
Ivezić, Marija ; Raspudić, Emilija ; Brmež, Mirjana ; Majić, Ivana ; Brkić, Andrija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
ICE 2008 / Crewe, Robin - Durban : Entomological Society of Southern Africa, 2008

Skup
XXIII International Congres of Entomology

Mjesto i datum
Durban, Južnoafrička Republika, 06.07.2008. - 12.07.2008

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
WCR; ECB; pest of maize; Croatia

Sažetak
Introduction: Western corn rootworm (WCR) (Diabrotica virgifer virgifera LeConte) and European corn borer (ECB) (Ostrinia nubilalis Hübner) are considered to be the most harmful pests of maize in Croatia. Research was done with the aim to evaluate combined attack of both pests in Croatia. Methods: The research was carried out at the Agricultural Insitute Osijek, in years from 2003 to 2007 on 7 Croatian commercial maize hybrids. WCR population was monitored by pheromone traps. Root injury was assessed during July according to the Iowa Node Injury Scale (0-3). In order to determine ECB larvae and total damages per plant were dissected in September. Results: Node-injury ratings ranged from 0.58 to 1.61. From 2003 to 2006, rating of all hybrids except one, planted in monoculture for 7 years, were assessed over 1. Hybrid OSSK 617 showed greater tolerance to the WCR larvae. Since the maize was grown in monoculture only for two years, considerably less damage was determined in 2007 when node-injury ratings ranged from 0.38 to 0.73. ECB attack in 2003 and 2004, was more than 81%, in 2005 and 2006 damage was more then 41% and it was considerably lower. In 2007, nearly 100% maize stalks were infested with ECB larvae. Stalk damage was positively correlated with the intensity of ECB attack. Conclusions: The obtained results indicate that Western corn rootworm and European corn borer are severe pests of maize in Croatia and in order to avoid economic damages integrated pest management is recommended.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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