PNABD246.pdf

Results of in vitro studies indicate that the seed coat of Vigna mungo
possesses certain antifungal substances which reduce the growth of seed surface
fungi (Aspergillus niveus, Cladosporium herbarum, Rhizoctonia solani), but
stimulates internally borne fungi (Aspergillus flavus, A. terreus). [THH]
*0365 O'Neill, M.J. ; Adesanya, S.A. ; Roberts, MzF. 1983. Antifungal
phytoalexins in Phaseolus aureus Roxb. ZEITSCHRIFT FUER NATURFORSCHUNG (TEIL
C: BIOCHEMIE, BIOPHYSIK, BIOLOGIE, VIROLOGIE), v.38(9-10):693-697. [En] [En
Abst] (REP.MB-2375)
Eight phytoalexins have been isolated from Vigna radiata (mungbean)
seedlings after treatment with aqueous CuCl2. These compounds include three
isoflavones: genistein. 2'-hydroxygenistein and a compound tentatively
identified as 2,3-dehydrokievitone, four isoflavones: dalbergioidin, kievitone,
cyclokievitone and 5-deoxykievitone, and the pterocarpan phaseollidin. The
antifungal activities against Cladosporium cucumerinum were determined. [AS]
*0366 Deng, T.C. 1984. [The major diseases of mungbean and their control].
PESTICIDE WORLD, v.12:47-49. [Ch] (A:PS)
More than 26 diseases of mungbean have been reported. Powdery mildew and
Cercospora leaf spot are the most important diseases of mungbean in Taiwan. The
symptomology, epidemiology varietal resistance and control measures are
discussed. [TCW]
*0367 Arora, Y.K. ; Bajaj, K.L. 1985. Peroxidase and polyphenol oxidase
associated with induced resistance of mung bean to Rhizoctonia solani Kuhn.
PHYTOPATHOLOGISCHE ZEITSCHRIFT, v.114(4):325-331. [En] [En De Abst] (A:PS)
Peroxidase and polyphenol oxidase activities and peroxidase isozyme
patterns were determined at different stages of hypocotyls of mungbean infected
with Rhizoctonia solani. The effect of ethephon (2-chloroethyl phosphonic acid)
has been studied. Peroxidase activity increased at 24 h after inoculation as
compared with controls followed by a decline later. It increased at 120 h.
Polyphenol oxidase activities increased after inoculation. Ethephon treatment
increased the resistance to Rhizoctonia solani and enhanced peroxidase a.,d
polyphenol oxidase activities. Peroxidase isozyme pattern was found to change
as a result of inoculation and ethephon treatment. The results indicated that
ethephon-induced resistance was related to peroxidase and polyphenol oxidase
activities. [AS]
- Leaf Spots
*0368 Welles, C.G. 1924. Studies on a leaf spot of Phaseolus aureus new to
the Philippine islands. PHYTOPATHOLOGY, v.14:351-358. [En] [En Abst]
(REP.MB-0581)
A leaf spot of Vigna radiata has appeared in the plantings at the College
95