Effects of chemical treatments on infestation of Alternaria spp. and Fusarium spp. in correlation with technological wheat quality

Abstract

In this study, the time of infestation by fungi from genus Alternaria spp. and Fusarium spp. was investigated in different stages of wheat maturity (milk, waxy, and technological maturity); the effects of different fungicides on the yield, technological properties, and content of mycotoxin DON were studied also. The results showed that Alternaria spp. attacked spike and kernel in f lowering and end-f lowering stage, as it was already known for Fusarium species. Fungicide treatment increases the yield up to 20%, test weight by 3.7%, and thousand-kernel weight up to 19.1%. High content of mycotoxin DON, above tolerable limits, was detected only in the treatment with fungicide Caramba and in untreated control.Ispitivano je vreme infekcije gljivama iz roda Alternaria spp. i Fusarium spp. u razlicitim fazama zrelosti psenice (mlecna, vostana, puna) kao i dejstvo primene razlicitih fungicida na prinos, parametre tehnoloskog kvaliteta, i sadrzaj mikotoksina DON. Rezultati ovog istrazivanja su da i gljive iz roda Alternaria zarazavaju klas i zrno u fazi formiranja zrna, kao sto je to do sada bilo poznato za Fusarium vrste. Tretman fungicidima povecava prinos do 20 %, hektolitarsku masu za 3,7%, masu hiljadu zrna do 19,1%. Sadrzaj mikotoksina DON iznad dozvoljene granice utvrdjen je jedino kod primene komercijalnog preparata Caramba i kod kontrole bez tretmana. PR Projekat Ministarstva nauke Republike Srbije, br. III 46005