Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Change in the outbreak of rice diseases in mechanized transplant cultures.

Abstract

The rapid spread of mechanization during the last 10 yr has increased seed-borne and soil-borne diseases in nursery beds, and changed disease outbreaks in the field. Blast (Pyricularia oryzae) has increased while sheath blight [Corticium sasakii] and bacterial leaf blight [Xanthomonas campestris pv. oryzae] have decreased. Other diseases showing increasing incidence are bakanae (Gibberella fujikuroi) and bacterial grain rot (Pseudomonas glumae), while there is a decrease in downy mildew (Phytophthora [Sclerophthora] macrospora). The incidence of blast, bakanae, brown spot (Cochliobolus miyabeanus) and bacterial grain rot has increased in box nurseries; appropriate control measures are outlined. The incidence and control of soil-borne damping-off fungi in box nurseries are also described.