PNABD246.pdf

method, but did show inhibitory action by the turbidimetric method. [EMS]
*0324 Shekhawat, G.S. ; Patel, P.N. 1977. Seed transmission and spread of
bacterial blight of cowpea and leaf spot of green gram in summer and monsoon
seasons. PLANT DISEASE REPORTER, v.61(5):390-392. [EnJ tEn Abstj
(REP.MB-1542)
Seed transmission and secondary spread of cowpea (Vigna unguiculata ssp.
unguiculata) blight and mungbean (Vigna radiata var. radiata) leaf spot caused
by Xanthomonas vignicola and X. phaseoli, respectively, were studied during the
summer and monsoon seasons in Rajasthan and Delhi in India. During the summer
with mean relative humidity (RH1) 20-80% and temperature 25-34 C, the incidence
of cowpea blight reached 62% from an initial inoculum load of 1% infested seed,
but the incidence of mungbean leaf spot was only 0, 3, and 32% from 1, 10, and
100% initial seed infestation. Both diseases became severe during monsoon (mean
RH 50-95 and temperature 24-32 C). Stem infection was rare in mungbean leaf
spot. The seed transmission of cowpea blight caused seedling mortality or bushy
and stunted plants as a result of severe stem cankers; secondary spread,
however, caused leaf blight only. [AS]
*0325 Singh, D. ; Patel, P.N. 1977. Studies on resistance in crops to
bacterial diseases in India. 8. Investigations on inheritance of reactions to
bacterial leaf spot and yellow mosaic diseases and linkage, if any, with other
characters in mungbean. INDIAN PHYTOPATHOLOGY, v.30(2):202-206. [En] [En
Abst] (REP.MB-1915)
The resistance to bacterial leaf spot pathogen Xanthomonas phaseoli
mungbean strain, in mungbean (Vigna radiata (L.) Wilczek) lines P 476, P 646,
PLM 501 and Jalgaon 781 was found :.-be controlled by a single dominant gene
whereas yellow mosaic tolerance in variety 24-2 was governed by a single
recessive gene. The genes controlling disease reactions, seed color, and
maturity were independently inherited and freely combined. [AS]
*0326 Thakur, R.P. ; Patel, P.N. ; Verma, J.P. 1977. Studies on resistance
in crops to bacterial diseases in India. 11. Genetic make-up of mungbean
differentials of the races of bacterial leaf spot pathogen, Xanthomonas
phaseoli. INDIAN PHYTOPATHOLOGY, v.30(2):217-221. [En] [En Abstj
(REP.MB-1914)
Existence of distinct pathogenic races in the bacterial leaf spot pathogen,
X. phaseoli, in mungbean (Vigna radiata) was confirmed. To study the genetic
make-up of the four mungbean differential lines P-23, P-10875, PLM-95 and
IC-11303-3 a diallele set-of crosses was made and the Fl, F2 and backcross
progenies were inoculated with six raceL; of zhe pathogen. The results indicate
that (1) resistance in a differential to a race is governed by a single gene;
(2) the gene governing resistance in a differential is dominant to its
recessive allele governing susceptibility in another differential; (3) that a
gene or allele erning resistance or susceptibility in the differentials to
different races uo not overlap. [AS]
*0327 Kore, S.S. ; Shirshikar, S.P. 1978. Investigations on bacterial leaf
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