PNABD246.pdf

germplasm of local, exotic, and mutant origin were screened under natural field
conditions against Cercospora leaf spot. Only a single entry, MB-53, was highly
resistant and two entries, e.g., MB-114 and MB-140, were intermediate in both
the growing seasons. Accession MB-117 showed resistance in 1978-79 but appeared
to be susceptible in 1979-80. These resistant/intermediate lines are of exotic
origin and are being used in hybridization programs for developing resistant
cultivars. [AS]
*0084 Jalaluddin, M. ; Shaikh, M.A.Q. 1981. Evaluation of mungbean (Vigna
radiata (L.) Wilczek) germplasm for resistance to mungbean ellow mosaic virus.
SABRAO JOURNAL, v.13(1):61-68. LEn] [En Abstj (A:PS)
Yellow mosaic is the most damaging disease of mungbean in Bangladesh. Its
eradication or control is complicated owing to its transmission by the
whitefly. Development of resistant strains of the crop seemed most desirable.
One hundred and sixty-eight accessions of local, exotic and mutant origin were
screened under field conditions for identifying sources of resistance. Using a
disease severity index (D.S.I.) based on percentages of leaflets and leaf areas
infected, the accessions screened were graded into six disease reaction
classes. One highly resistant strain MB 53 was identified in Sri Lanka,
together with four resistant (three induced mutants from Bangladesh and one
Indian cultivar) and three moderately resistant (one induced mutant from
Bangladesh, one Indian and one Australian) strains. The resistance of the
strains, however, needs to be confirmed by controlled glasshouse tests. [AS]
*0085 Marimuthu, T. ; Sivaprakasam, K. 1981. Varietal reaction of green
gram (Vigna radiata (L.) Wilczek) to leaf spot and powdery mildew. PULSE
CROPS NEWSLErTER, v.1(4):55. [En] (A:PS)
Two hundred lines of mungbean were screened for Cercospora leaf spot and
powdery mildew resistance under natural conditions of infection for 3
consecutive years from kharif and rabi 1978 onwards. All lines tested were sown
in double rows of 15 cm length with a spacing of 30 x 10 cm in between the rows
of highly susceptible variety CO 3 or Hyb 12-4. The results indicated that the
lines ML 3, ML 5, ML 12. AVRDC 1387, AVRDC 3404, and AVRDC 3478 were resistant
to Cercospora leaf spot, while ML 3 alone was found to possess resistance to
both Cercospora leaf spot and powdery mildew. The line ML 3 is also reported to
be resistant to rust caused by Uromyces appendiculatus. [THH]
*0086 Mathur, A.K. ; Tyagi, R.N.S. ; Bhatnagar, L.G. 1981. Evaluation of
urad varieties for susceptibility to powdery mildew. PULSE CROPS NEWSLETTER,
v.1(3):59. [En] (A:PS)
Powdery mildew (Erysiphe polygoni) is one of the most important diseases of
blackgram in Rajasthan. The reaction of 39 blackgram varieties to powdery
mildew was studied. They were sown in two replications for 3 consecutive years.
Results qf 3 years revealed that only one variety 6203-1 was free both under
epiphytotic and artificial conditions and all others differed in their
susceptibility to the disease. [THH]
*0087 Singh, D.P. ; Sharma, B.L. 1981. Evaluation of mungbean germplasm.
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