Response of integrated disease management practices on bacterial leaf blight of rice

Abstract

Bacterial leaf blight disease caused by Xanthomonas oryzae pv. oryzae. Disease occurs in two phases – Kresek phase or Wilt phase which usually occurs at active tillering stage results death of the tillers. Other is Leaf blight phase, which is most common phase. In this phase disease initially starts from either one or both side of the leaf margins become water soaked and turns yellow to straw color in wavy pattern. The progress of disease, drying spreads downwards and inwards of the leaf blade causing drying and death of the leaves. Integrated disease management practices {seed treatment, use of FYM, cleaning of bunds and field, reduced (2/3) dose of Nitrogen with need based spray of chemicals} on disease severity of rice. Management practices adopted plot reduced the severity (25.42%) of sheath blight of rice and increase the grain yield (3662 kg/ha) as in non managed plot disease severity was recorded (59.1%) with (2775 kg/ha) yield in susceptible variety Pusa Basmati-1.