Vol. 1 (4) : July-August 2010 issue
Green Farming Vol. 1 (4) : 396-399 (July-August, 2010) (New Series)
Tolerance level of medium land rice races of Orissa resistant to yellow stem borer, Scirpophaga incertulas
D. PANIGRAHIa1* and S. RAJAMANIb2
aKrishi Vigyan Kendra (OUAT), Angul - 759 122,
bCentral Rice Research Institute, Cuttack - 753 006 (Orissa)
Designation : 1SMS (Plant Protection), 2Ex-Director
Subject : Entomology
Paper No. :
Total Pages : 4
Received :
Revised accepted :
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Citation :
D. PANIGRAHI and S. RAJAMANI. 2010. Tolerance level of medium land rice races of Orissa resistant to yellow stem borer, Scirpophaga incertulas. Green Farming Vol. 1 (4) : 396-399 ; July-August, 2010 (New Series)
ABSTRACT
A study was conducted during kharif 2003 and 2004 at CRRI, Cuttack to measure the tolerance level of 5 early and 5 late medium land races of Orissa resistant/ moderately resistant to yellow stem borer under rainfed condition. These land races showed higher damage levels than the semidwarf high yielding varieties and the plants had no compensation mechanism except in case of one early medium udasiali and two late medium Boita and Rupabali where compensation mechanism operated at a very lower level when infestation was made at vegetative stage. But when infestation was made at reproductive stage, % EBT, all the yield contributing characters and ultimately yield were reduced appreciably in case of all the test land races.
Key words :
Land races, Resistant, Scirpophage incertulas, Tolerance, Yellow stem borer.
