PNABD246.pdf

Peanut and soybean witches' brooms were transmitted to peanut, soybean,
mungbean, towpea and Crotalaria juncea by Orosius argentatus. These plants
showed typical witches' broom symptoms. Mycoplasma-like organisms occurred in
the phloem tissue of peanut, soybean and C. juncea plants showing witches'
broom symptoms. These results suggest that the mycoplasma-like agents which
cause witches' broom on legume plants are identical. Transmission mode of
peanut witches' broom by the insect was examined. The insects were efficient
after acquisition access of 1 day and transmitted the disease in one hour
inoculation feeding. Incubation period of the pathogen in insects was 20-26
days and the insects retained the pathogen until dead. Percentage of active
transmitter was 80-90%. [AS]
*0313 Benigno, D.R.A. 1979. Occurrence of a witches' broom disease of
mungbean in the Philippines. PHILIPPINE PHYTOPATHOLOGY, v.15(i):86. [En]
(A:PS)
A witches' broom disease of mungbean is reported from the Philippines.
Infected plants are recognized by their stunted and bushy appearance. Leaves
are diminutive in size, cupped or twisted, and tend to cluster together close
to the stem. [THH]
*0314 Kiratiya-Angul, S. ; Semboku, T. ; Deema, N. 1984. Phyllody disease
of some legumes in Thailand. 1. Nycoplasma-like organisms associated with
phyllody of peanut, soybean, mngbean and winged bean. JARQ: JAPAN
AGRICULTURAL RESEARCH QUARTERLY, v.17(4):302-303. [En] (A:PS)
This research note deals with the electron microscopic observations of
lesions of the phyllody diseased tissues of peanut, soybean, mungbean and
winged bean, and describes the mycoplasma organisms detected in the tisoue.
[THH]
BACTERIAL DISEASES
- General
*0315 Patel, P.N. ; Jindal, J.K. 1972. Bacterial leaf spot and halo blight
diseases of mung bean (Phaseolus aureus) and other legumes in India. INDIAN
PHYTOPATHOLOGY, v.25(4):517-525. [Enj (REP.MB-0182)
Two bacterial diseases of mungbean named as bacterial leaf spot and halo
blight are described for the first time and the pathogens identified as new
strains of Xanthomonas phaseoli and Pseudomonas phaseolicola, respectively. The
bacterial leaf spot was observed at eight locations in India during 1969 and
was found spreading through seeds. The characteristic symptom of the disease
was the brown, dry raised spots on leaf and stem. On leaf the spots first
appeared superficially as eruptions and gradually invaded the tissue through
the leaf thickness. In artificial inoculations the pathogen also infected
Phaseolus vulgaris, P. lunatus, P. bracteatus, Dolichos lablab and Lens
esculentum but the reaction was not as severe as on mungbqan. The mungbean
variety Jalgaon-781 was highly resistant. The halo blight produced water-soaked
spots surrounded by characteristic chlorotic halo and other symptoms like in
bean halo blight disease. The organism produced water-soaking in P. bracteatus,
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