RESISTANCE RESPONSE OF RICE ( L.) GERMPLASM AGAINST RICE LEAF FOLDER ( G.) UNDER GREENHOUSE CONDITION IN PAKISTAN
Ishaq Ahmad*, Abdul Rehman**, Ehsan –Ul- Haq*** and Arif Mahmood****
Rice leaf folder ( G.) is a key insect pest of rice crop and distributed all over the rice growing areas of the world including Pakistan. The infestation of rice leaf folder often appears very suddenly resulting in huge yield losses. Host plant resistance is an important component of IPM. It is easy to use, viable, durable, effective and long term method as compared to any other control measure. It was imperative to exploit the sources of resistance to cope with threat the pest and its environmental friendly control. Present study was carried out in greenhouse of Plant Genetic Resources Institute (PGRI), NARC. Twenty six Pakistani genotypes of rice germplasm including 15 coarse and 10 fine genotypes were screened in pot experiment during 2011 including TNI, used as susceptible check. The damage results revealed that one genotype PK-8893-4-1-3-1 was moderately resistant, seven genotypes were moderately susceptible, eleven genotypes found susceptible and seven genotypes were highly susceptible. The present study will facilitate the breeders in the development of leaf folder resistant varieties in future.