Authors:István Virág, K. Szalay, C. Szőke, G. Milics, L. Marton and M. Neményi
Kernel samples of two maize hybrids (46308 and 463017) with different levels of resistance to Fusarium ear rot were collected from artificially and naturally infected plants. The spectral characteristics of the samples were analysed with an ASD Fieldspec 3 MAX spectroradiometer in the wavelength range of 350 to 2500 nm using an ex situ method. The different extents of artificial and natural Fusarium infection on the maize kernels resulted in spectral differences detectable with a spectroradiometer. The data showed that for both genotypes the level of Fusarium infection generated by artificial inoculation was significantly higher than that caused by natural infection over a wavelength range of 2030 to 2080 nm. Principal Component Analysis (PCA) on the data set for this range revealed that the first component explained 77.0% of the variability for hybrid 46308 and 97.0% for hybrid 46317.
Authors:C. Bolduan, J. Montes, B. Dhillon, V. Mirdita and A. Melchinger
to EarRot and Mycotoxin Contamination in Early European Maize Inbred Lines. Crop Sci. In press.
Josephs, R.D., Schuhmacher, R., Krska, R. 2001. International interlaboratory study for the determination of the
. – Headrick , M. J. – Pataky , K. J. – White , G. H. : 2003 . Influence of Cryl Ab protein and hybrid genotype on Fumonisin contamination and Fusarium earrot of corn . Crop Science . 43 : 1283 – 1293 .
Authors:M. Blandino, M. Saladini, A. Alma and A. Reyneri
(Hübner) (European corn borer) is the main maize pest in Central and South Europe and it promotes
infection on maize grains, which is able to produce fumonisins. The objective of this study was to determine the effect of the timing of pyrethroid treatments on European corn borer damage, fungal ear rot and fumonisin contamination. The field experiments were performed from 2005 to 2007 in NW Italy. Four application timings were compared to an untreated control. The insecticide treatments were applied at approximately 10 days intervals, starting from the end of flowering. The last treatment was performed approximately 15 days after the ECB flight peak. At harvest, the ears were rated for the incidence and severity of European corn borer damage and fungal ear rot symptoms, and the harvested kernels were analyzed for fumonisins B
. In all the years, the treatments applied 7–10 days before the European corn borer adult flight peak showed the best efficacy to control insect damage on ears. Fungal ear rot and fumonisin contamination were clearly affected by European corn borer control. The occurrence of this mycotoxin in plots treated at the best pyrethroid application timing was significantly reduced, on average by 76%, compared to the untreated control. Furthermore, early insecticide applications, at the end of maize flowering, showed significantly lower fumonisin contamination than treatments applied at approximately 15 days after the adult flight peak. This research indicates that the production of maize kernels with low fumonisin content may be enhanced by a correct timing of the insecticide application against second generation European corn borer.