Sixty seven rice varieties/lines including ten differential varieties, a resis~ant and susceptible
check were tested in International Rice Gall Midge Nursery (IRGMN) during the wet season
of 1995 and 1996; and 179 varieties/advance lines were tested in National Rice Gall Midge
Nursery (NRGMN) during the wet season of 1996 at Chaughara, Makwanpur. Based on the
mean score of the two years the differential variety Eswarakora was found highly resistant.
Another differential variety, Veluthancheera and the test entry PTB 21 (Tekkan) were found
highly resistant to rice gall midge during 1995, but was not tested during 1996. The variety,
Eswarakora is suggested to use in breeding program as a resistant donor for developing gall
midge resistant varieties. The lines W 1263, OR 148-1-44 and PTB 12 were also moderately
resistance rice gall midge and should be tested in yield trials. Similarly out of 179 genotypes
tested in NRGMN, only NR 1004-22-1-4-1-1-1-2-2 was found moderately resistant to this
insect. The grain yield ofNR 1004-22-1-4-1-1-1-2-2 in IETRL-E was at par the check variety
Radha 4 at Parwaniput: and should be further evaluate at the hot spot. Eswarakora is
considered as the source of resistant against China Thailand, Raipur, Andhra Pradesh and
Bihar biotype. The other varieties resistant against China, Raipur and Andhra Prasesh
biotype are susceptible to gall midge population at Chaughara. Differential reaction of
Eswarakora indicates the possibility of a similar biotype of the insect in Chaughara as that
of Thailand and Bihar.

Sixty seven rice varieties/lines including ten differential varieties, a resis~ant and susceptible
check were tested in International Rice Gall Midge Nursery (IRGMN) during the wet season
of 1995 and 1996; and 179 varieties/advance lines were tested in National Rice Gall Midge
Nursery (NRGMN) during the wet season of 1996 at Chaughara, Makwanpur. Based on the
mean score of the two years the differential variety Eswarakora was found highly resistant.
Another differential variety, Veluthancheera and the test entry PTB 21 (Tekkan) were found
highly resistant to rice gall midge during 1995, but was not tested during 1996. The variety,
Eswarakora is suggested to use in breeding program as a resistant donor for developing gall
midge resistant varieties. The lines W 1263, OR 148-1-44 and PTB 12 were also moderately
resistance rice gall midge and should be tested in yield trials. Similarly out of 179 genotypes
tested in NRGMN, only NR 1004-22-1-4-1-1-1-2-2 was found moderately resistant to this
insect. The grain yield ofNR 1004-22-1-4-1-1-1-2-2 in IETRL-E was at par the check variety
Radha 4 at Parwaniput: and should be further evaluate at the hot spot. Eswarakora is
considered as the source of resistant against China Thailand, Raipur, Andhra Pradesh and
Bihar biotype. The other varieties resistant against China, Raipur and Andhra Prasesh
biotype are susceptible to gall midge population at Chaughara. Differential reaction of
Eswarakora indicates the possibility of a similar biotype of the insect in Chaughara as that
of Thailand and Bihar.