Seasonal variation in sorghum resistance to shoot fly

Abstract

The studies on seasonal variation in sorghum (Somalia germplasm) resistance to shoot fly Atherigona varia soccata Rondani were conducted in four experimental sowings in three seasons viz. late postrainy season 1990-9 1, early rainy 1991, and early postrainy 1991-92 at ICRISAT Center. Investigations included evaluation for resistance of the entries to the shoot fly over seasons for less oviposition, less damage resulting in fewer dead hearts and tolerance/recovery resistance. In view of seasonal variation, entries were assessed in relation to various environmental parameters namely temperature, humidity and rainfall and their influence on varietal ~esistance was monitored