PNABD246.pdf

where research work on improvement of seed legumes was in progress. The nine
diseases encountered were cowpea blight (Xanthomonas vignicola), mungbean leaf
spots (Xanthomonas sp. and Pseudomonas sp.), blackgram leaf spot and stem
canker soybean pustule (X. phaseoli var. sojense), arhar leaf spot and stem
canker (X. cajani), moth blight (Xanthomonas sp.), Fuscus blight of French bean
(X. phaseoli var. fuscans) and Dolichos leaf spot (X. phaseoli). Of these,
mungbean leaf spot due to Pseudomonas sp. and moth blight are new records from
anywhere on these crops in nature, whereas th2 occurrence ef Fuscus blight in
French bean is the first for India. The diseabes were widespread in the
germplasm collections and improved varieties in the coordinated trials at most
of the locations. Evidences from field observations suggested that the
pathogens involved were transmitted through seeds and by way of infected seeds
they were disseminated from one research institution to the other and to
farmers' fields. Several germplasm lines and varieties exhibited high degree of
resistance under natural epiphytotic. A distribution map prepared from the
previous reports and our surveys of these diseases in India are presented. [ASJ
*0321 Patel, P.N. ; Jindal, J.K. ; Singh, D. 1972. Studies on resistance in
crops to bacterial diseases in India. 4. Resistance in mung bean (Phaseolus
aureus) to Xanthomonas phaseoli. INDIAN PHYTOPATHOLOGY, v.25(4):526-529.
[En] [En Abst] (REP.MiB-0183)
Of the 2160 germplasm lines of mungbean (Vigna radiata) tested for
resistance against the bacterial leaf spot pathogen, Xanthomonas phaseoli, 29
proved to be highly resistant and 5 to be tolerant in more than one test. In
some resistant lines the young leaves on seedlings exhibited strong
hypersensitive reaction but at seed maturity stage old leaves showed few spots.
[AS]
*0322 Sood, A.K. ; Thind, B.S. ; Singh, N. 1976. Occurrence and control of
bacterial leaf spot of Dung (Phaseolus aureus Roxb.) Ja the Punjab State.
JOURNAL OF RESEARCH (PUNJAB AGRICULTURAL UNIVERSITY), v.13(2):182-185. [Eni
[En Abstj (REP.MB-2421)
Studies on Xanthomonas phaseoli mung strain, the causal organism of
bacterial leaf spot of mungbean (Vigna radiata Wilczek), revealed that the
bacterium is seed-borne. Seed treatment with different chemicals was found to
reduce the seedling infection, although a marked reduction in germination was
observed in some cases. Captan (0.3%) and bleaching powder (0.025%) were found
to be the most effective seed-treating agents. In field experiments laid out at
Ludhiana and Gurdaspur, three protective sprays each of streptocycline (100
ppm), zineb (0.3%) and benomyl (0.2%) were found to be effective in controlling
the secondary infection of the bacterium. [AS]
*0123 qnr., A V ; Thind, B.S. ; Singh, ". 1976. in ..... eVilumLiu of
some antibiotics and fungicides against Xanthomonas phaseoli causal agent of
leaf spot of sung. HINDUSTAN ANTIBIOTICS BULLETIN, v.18(3/4):119-120. [Enj
(REP .MB-2440)
The mungbean bacterial leaf spot Xanthomonas phaseoli was inhibited in
vitro by streptocycline, agrimycin 100, streptomycin, and a combination of
streptocyline and copper sulphate. Zineb, mancozeb, Bavistin, copper
oxychloride, and benomyl did not inhibit the bacterium by the paper disc
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