PNABD246.pdf

were identified as natural hosts. In microprecipitin and agar gel diffusion
tests, the virus failed to react with antisera of bean common mosaic, bean
yellow mosaic, soybean mosaic, potato virus Y, peanut mottle, henbane mosaic,
and tobacco etch viruses. This causal virus, apparently in the potato virus Y
group, is a newly-characterized pathogen of mungbean and is named mungbean
mottle virus. [AS]
*0263 Singh, R.N. ; Nene, Y.L. 1978. Further studies on the mosaic mottle
disease of urd bean. INDIAN PHYTOPATHOLOGY, v.31(2):159-162. (REP.MB-2175)
A viral disease with systemic mottle symptoms in blackgram (Vigna mungo) is
widely prevalent in north India. The in vitro properties of the virus in
extract are: thermal inactivation, infection after heating for 10 minutes at 55
C but not at 60 C; dilution end point, infection at 5 x I.OE-3 but not at
I.OE-4; longevity in vitro at 24 C, infection at 36 hours but not at 48 hours.
The host range is restricted to a few legumes. It is transmitted by Aphis
craccivora and A. gossypli and is serologically related to common bean mosaic
virus. [AS]
*0264 Talens, L.T. 1978. Mungbean viruses in the Philippines. I. Identity
of a virus causing mottle in mungbean. PHILIPPINE PHYTOPATHOLOGY,
v.14(1&2):58-b2. [Enj (REP.MB-2U79)
A virus inducing a mottle reaction and stunted growth in field-grown
mungbean [Vigna radiata (L.) Wilczekj was isolated and identified. Based on
thermal stability, serological property, and morphological features, the
mungbean virus isolate was found to possess physical and antigenic properties
similar to blackgram mottle virus (BgMV). The virus was stable at high
temperature (10 min duration at 90-95 C) and occurred in high concentration
(infecttvity retained at I.OE-6 dilution) in infected mungbean tissues
harvested 10-14 days after mechanical inoculation. The virus reacted strongly
in an Ouchterlony double immunodiffusion test with reference BgMV antiserum.
Isometric particles which measured 28-30 nm in diameter were seen in electron
microscopic examinations of partially purified preparations stained with 2%
neutral phosphotungsta-e. This study describes the first report on the
occurrence of mungbean mottle virus in the Philippines with antigenic
properties similar to blackgram mottle virus. [ASJ
*0265 Talens, L.T. ; Dolores, A.C. 1978. Mungbean viruses in the
Philippines. 2. Host range, symptomatology and effect of mungbean mottle virus
on growth of mungbean, Vigna radiata (L.) Wilczek. PHILIPPINE JOURNAL OF CROP
SCIENCE, v.3(4):242-246. [En] [En Abst] (REP.MB-2085)
A virus previously named mungbean mottle virus (MMV) was shown to incite
veinal chlorotic reaction in inoculated primary leaves of mungbean. This was
accompanied by the appearance of random chlorotic areas in the emerging
trifoliate leaves. The chlorotic reaction originated from the veins, spread
outwards co the interveinal areas, and gave the foliage a mottled appearance.
The chlorotic reaction intensified as viral infection progressed. This is
apparently the first detailed description of the virus in the Philippines.
Blackgram and soybean proved susceptible to systemic invasion by the mottle
virus. Local lesions were produced on Chenopodium amaranticolor, C. quinoa,
Cyamopsis tetragonoloba, Macroptilium lathyroides, and Phaseolus vulgaris cv.
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