Naslov
Correlation between wcr damage and the development of secondary corn roots

Autori
Ivezić, Marija ; Tollefson, J.Jon ; Raspudić, Emilija ; Brmež, Mirjana

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

Izvornik
Prvi kongres hrvatskih znanstvenika iz domovine i inozemstva Zbornik sažetaka postera znanstvenih novaka izlaganih u inozemstvu 2002., 2003. i 2004. / Kniewald, Zlatko - Zagreb : Akademija tehničkih znanosti Hrvatske (HATZ), 2004, 429-429

Skup
Prvi kongres hrvatskih znanstvenika iz domovine i inozemstva

Mjesto i datum
Vukovar, Hrvatska; Zagreb, Hrvatska, 15.11.2004. - 19.11.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
WCR ; corn ; damage ; secondary corn roots

Sažetak
Since Western Corn Rootworm (Diabrotica virgifera virgifera LeConte) occurred in Croatia (1995), it becomes very severe pest of corn which can cause economic losses. In the last few years, in the county of Eastern Slavonia and Baranya, lot of cornfields had great percentage of lodged plants. Our investigation was based on evaluation of corn tolerance against WCR. Measuring of the root size and its weighting are one of the main parameters for evaluation of the hybrid tolerance. Plant with better developed secondary roots is able to give high yields even after WCR larvae feeding. The aim of this investigation was to evaluate the development of the secondary roots after WCR larval feeding. The trials were done in USA (Iowa) and in Croatia (Gunja and Osijek) during three years (2001, 2002, and 2003). Nine Croatian (Institute of Agriculture, Osijek) and two Pioneer Hi-Bred Int. Inc. (Johnston, Iowa, USA) commercial corn hybrids were evaluated by using randomized complete block design with four replications. Secondary roots were evaluated by visual scale 1-6 (1 means the best and 6 is the worst), and evaluation was also measured by weighing (g) the root regrowth at Iowa plots. Strong positive correlations were determined between weighting the roots in grams and visual scale, in Iowa, during all three years of investigations. Average regrow of the secondary roots between the two weightings (two weeks), were 12, 06 g. The best hybrids were: OSSK 644, OSSK 596R, OSSK 617 and OSSK 602. Those hybrids were the most tolerant in investigation. The results showed that visual scale is good for root regrowth evaluation and it can replace the evaluation by weighting roots which means less of human work.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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