PNABD246.pdf

effective against R. solani. [AS]
*0535 Elazegui, F.A. ; Mew, T.W. 1983. Comparative effects of fungicides on
pre-emergence damping-off of grain legumes caused by Rhizoctonia solani,
Sclerotium rolfsii and Pythium debaryanum. TROPICAL GRAIN LEGUME BULLETIN,
no.27:2-7. [En] (A:PS)
Seed treatment experiments were carried out in the greenhouse to find
suitable fungicides to protect damping-off of mungbean, soybean and cowpea
seedlings. In the trial on Rhizoctonia damping-off. PCNB + thiadiazole proved
most promising. On the two Sclerotium damping-off trials, Carboxin + captan was
the most effective. For control of damping-off caused by P. debaryanum, the
most effective fungicides were CGA 48988 and Orthocide RE-26745. [THH]
*0536 Hooda, I. ; Grover, R.K. 1983. Nutritionally mediated virulence of
Rhizoctonia bataticola on mung bean (Vigna radiata). INDIAN PHYTOPATHOLOGY,
v.36(4):662-666. [Eni [En AbstJ (A:PS)
The virulence of Rhizoctonia bataticola inoculum in causing seedling
mortality and leaf blight of mungbean (Vigna radiata) was pre-conditioned by
the nutritional status of the substrate medium. Glucose and sucrose as carbon
sources increased the virulence as well as mycelial growth of the fungus. Among
nitrogen sources, asparagine significantly increased the virulence of the
inoculum. So was the case when the medium was devoid of bivalent metal ions,
viz., Fe++ Zn++ and Mg++. Addition of Fe++ and Mg++ individually or in
combination with Zn++ to the medium produced inoculum of low virulence. [AS]
*0537 Charya, M.A.S. ; Reddy, S.M. 1984. Inhibition of production of pectic
enzymes of Phoma exigua, seed-rot fungus of Vigna radiata. INDIAN
PHYTOPATHOLOGY, v.37(3):537-539. [En] (A:PS)
The influence of gibberellic acid, yeast extract, Catechol, gallic acid,
Antracol, and Panoctine on in vitro production of pectolytic enzymes by Phoma
exigua was investigated. All those substances more or less inhibited all
enzymes (PG, PMG, PAL, and PL) except yeast extract which enhanced exo-PMG
production. The inhibitory action of the two phenols and two fungicides
increased with increased concentration. [EMS]
*0538 Anderson, T.R. 1985. Root rot and wilt of mung bean in Ontario.
CANADIAN PLANT DISEASE SURVEY, v.65(1):3-5. [En] [En Fr Abst] (A:PS)
Root rot and wilt of mungbean caused severe losses in a field and a nursery
in 1979 and 1980. Root rot was prevalent during the early growing season on
clay soil. Wilt occurred during the flowering and late pod filling stages on
clay and sandy soil. Rhizoctonia solani, Thielaviopsis basicola, Fusarium
oxysporum and a Fusarium sp. isolated from diseased plants were evaluated for
pathogenicity in the greenhouse. R. solani and T. basicola caused distinct
lesions on roots and lower stems similar to those observed in the field. F.
oxysporum and Fusarium sp. were non-pathogenic in greenhouse experiments. [AS]
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