Leaf stripe and stem rot caused by Burkholderia gladioli, a new disease of maize in Mexico.

摘要

A new maize disease was observed in Veracruz, Mexico, during 2003-04. Initial symptoms in the leaves were small, white-yellow, watery spots, which coalesced into dry necrotic stripes that were 0.3 cm wide and 8.0 cm long. Reddening sometimes developed on these leaves. Stems developed a rot in the crown. The flag leaf showed a rot and necrosis at the base, rolled inward, and dried out. Necrosis developed at the base of the ears and their growth was halted. The morphological characteristics of the isolates were similar to those described for B. gladioli. The sequences of the isolates showed 99% similarity with those of the field isolates of B. gladioli. This is thought to be the first report of B. gladioli causing leaf stripe and stem rot of maize in Mexico.