Yield losses due to gall midge Orseolia oryzae Wood‐Mason in some rice varieties and characterisation of tolerance

Abstract

The yield losses caused by the Asian rice gall midge Orseolia oryzae Wood‐Mason in 15 traditional or high yielding varieties, studied by the paired plot (unprotected and protected) technique, ranged from‐0.06 in CR.1014 to 1.1% in CR.58‐MR.1538 for every unit per cent increase in silver shoots. Based on this, CR.1014 was identified as highly tolerant with no yield loss (‐0.06%) followed by Jagannath with 0.27%, while the other entries were rated as either moderately tolerant (0.3–0.60%) or least tolerant (0.61 % and above).

Keywords:

• Yield losses
• Rice gall midge
• Rice varieties
• Tolerance