PNABD246.pdf

PNABD246.pdf PNABD246.pdf

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The effect of four sowing dates on the incidence of Alternaria leaf spot on 14 varieties of mungbeans was investigated. [THE] *0394 Mew, I.C. ; Wang, T.C. ; Mew, T.W. 1975. Inoculum production and evaluation of mungbean varieties for resistance to Cercospora canescens [Abst.I. IN: Proceedings of the American Phytopathological Society, vol.l. St. Paul, MN : The American Phytopathological Society. p.93 [En] (SB599.P7 v.1) MEETING: Annual Meeting of the American Phytopathological Society, 66th -- Vancouver, Canada, Aug 11-15, 1974 Leaf spot of mungbean (Vigna radiata var. radiata) caused by Cercospora canescens is a disease of major importance in various mungbean growing areas of Southeast Asia. The pathogen produced conidia readily but not abundantly on potato-dextrose agar. Agar medium containing carrot leaf juice was best for sporulation by the pathogen followed by mungbean-leaf juice-oatmeal agar and autoclaved carrot root discs. From 15 to 28 C the number of conidia formed was directly correlated with temperature. Conidial production was promoted by light. When a spore suspension (2000 conidia/ml) was applied to mungbean at 3-trifoliolate leaf stage in the greenhouse or field, symptoms were noted within 7 days and lesions were suitable for disease evaluation in 10 to 12 days. Twenty-nine of 230 accessions of mungbean selected by AVRDC plant breeder through yield trials were resistant to C. canescens in the field with artificial inoculation. [AS] *0395 Haware, M.P. ; Pavgi, M.S. 1976. Host range of two Protomycopsis species from India. SYDOWIA: ANNALES MYCOLOGICI, v.29:272-274. [En] (REP.MB-2765) of 23 plant species inoculated, only Vigna mungo, V. radiata and V. sinensis were susceptible to Protomycopsis phaseoli. [THH] *0396 Haware, M.P. ; Pavgi, M.S. 1976. Cytology of chlamydospore development in Protomycopsis species. CYTOLOGIA, v.41:459-465. [En] [En Abstj (REP.MB-2389) Observations on the nuclear behavior during chlamydospore development in Vigna mungo and Sesbania grandiflora Pers. by Protomycopsis patelii Pavgi and Thirumalachar and Protomycopsis thirumalacharii Pavgi, respectively, described in detail. The vegetative cells and/or conidia from diploid mycelia are pathogenic in the 2 species. Numerous chlamydospores typical of the species form the terminal sporogenous cells of the permeating hyphate within the infection epicenter. No vascular infection was noted. No haustoria were developed by any of the species. Pathological effects were observed on the host cells without any stimulation for cell multiplication and enlargement. Comparison was made on chlamydospore development in species of allied genera in the family Protomycetaceae. [AS] *0397 Kotasthane, S.R. ; Agrawal, S.C. 1976. Control of foliar diseases of mung bean (Phaseolus aureus) by fungicides. PESTICIDES, v.10(8):35-36. [EnJ 101

(REP.MB-1567) Four fungicides were tested for control of powdery mildew (Erysiphe polygoni) and leaf spot (Macrophomina phaseoli) on mungbean. Bavistin gave the best control of both diseases and the highest yield, and was followed by Benomyl. [EMS] *0398 Rewal, H.S. ; Bedi, P.S. 1976. Epidemiology and control of Cercospora leaf spot of "mung" in the Punjab. INDIAN PHYTOPATHOLOGY, v.29(i):102-103. [En] (REP.MB-1740) Leaf spot caused by Cercospora canescens is one of the important diseases of mungbeans in the Punjab. The disease generally appears on leaves in August. As a result of infection defoliation takes place which makes the plants weak and unthrifty. The disease was very severe under low temperature (14 C) and high humidity (85%) conditions. The sugar content of the plant also affected the disease incidence. The late sown crop contracted significantly less disease relative to that sown early. Three sprayings of the crop with Bavistin at the rate of 0.07% were found to be most effective, however, maturity of the crop was delayed. When the third spray was replaced with Dithane M-45, control was equally effective and no delay in maturity occurred. [THHJ *0399 Singh, D.V. ; Singh, R.R. 1976. Chemical control of Cercospora leaf spot of green-gram. INDIAN PHYTOPATHOLOGY, v.29(3):337-339. [En] (REP.MB-1903) Field trials were conducted in 1973 and 1974 to evalute the effectiveness of six fungicides against Cercospora leaf spot (Cercospora canescens) of mungbean. Bavistin gave the highest yield, followed by miltox, Blue copper-50 and Dithane M-45; Dithane Z-78 was less effective. Brestan-60 was effective in controlling the disease, but was phytotoxic, and therefore, did not raise yield. [THHJ *0400 Singh, Kuldip ; Khatri, H.L. ; Bansal, R.D. 1976. Chemical control of Cercospora leaf Cpot of Phaseolus aureus. INDIAN JOURNAL OF MYCOLOGY AND PLANT PATHOLOGY, v.5(I):108. [En] [En Abst] (REP.MB-2411) A field evaluation of Zineb 83%, Blitox 50, Benlate 50W, captan and streptocycline for control )f Cercospora leaf spot of mungbean (Cercospora cruenta) revealed that all your chemicals reduced the number of of spots/leaf. The best control was recorded in Benlate-treated plots. [THH] *0401 Haware, M.P. ; Pavgi, M.S. 1977. Cytology of chlamydospore germination and in vitro development of Protomycopsis species. CARYOLOGIA, v.30(3):313-331. [En] [En Abst] (REP.MB-2443) Observations are described on the nuclear behaviour relative to the chlamydospore germination, sporogenesis and in vitro chlamydospore development in Protomycopsis patelii Pavgi and Thirumalachar and Protomycopsis thirumalacharii Pavgi, respectively parasitic on Vigna mungo and Sesbania grandiflora Pers. Taxonomy and phylogenetic relationship of the genus 102

(REP.MB-1567)<br />

Four fungicides were tested for control of powdery mildew (Erysiphe<br />

polygoni) and leaf spot (Macrophomina phaseoli) on mungbean. Bavistin gave the<br />

best control of both diseases and the highest yield, and was followed by<br />

Benomyl. [EMS]<br />

*0398 Rewal, H.S. ; Bedi, P.S. 1976. Epidemiology and control of Cercospora<br />

leaf spot of "mung" in the Punjab. INDIAN PHYTOPATHOLOGY, v.29(i):102-103.<br />

[En] (REP.MB-1740)<br />

Leaf spot caused by Cercospora canescens is one of the important diseases<br />

of mungbeans in the Punjab. The disease generally appears on leaves in August.<br />

As a result of infection defoliation takes place which makes the plants weak<br />

and unthrifty. The disease was very severe under low temperature (14 C) and<br />

high humidity (85%) conditions. The sugar content of the plant also affected<br />

the disease incidence. The late sown crop contracted significantly less disease<br />

relative to that sown early. Three sprayings of the crop with Bavistin at the<br />

rate of 0.07% were found to be most effective, however, maturity of the crop<br />

was delayed. When the third spray was replaced with Dithane M-45, control was<br />

equally effective and no delay in maturity occurred. [THHJ<br />

*0399 Singh, D.V. ; Singh, R.R. 1976. Chemical control of Cercospora leaf<br />

spot of green-gram. INDIAN PHYTOPATHOLOGY, v.29(3):337-339. [En]<br />

(REP.MB-1903)<br />

Field trials were conducted in 1973 and 1974 to evalute the effectiveness<br />

of six fungicides against Cercospora leaf spot (Cercospora canescens) of<br />

mungbean. Bavistin gave the highest yield, followed by miltox, Blue copper-50<br />

and Dithane M-45; Dithane Z-78 was less effective. Brestan-60 was effective in<br />

controlling the disease, but was phytotoxic, and therefore, did not raise<br />

yield. [THHJ<br />

*0400 Singh, Kuldip ; Khatri, H.L. ; Bansal, R.D. 1976. Chemical control of<br />

Cercospora leaf Cpot of Phaseolus aureus. INDIAN JOURNAL OF MYCOLOGY AND<br />

PLANT PATHOLOGY, v.5(I):108. [En] [En Abst] (REP.MB-2411)<br />

A field evaluation of Zineb 83%, Blitox 50, Benlate 50W, captan and<br />

streptocycline for control )f Cercospora leaf spot of mungbean (Cercospora<br />

cruenta) revealed that all your chemicals reduced the number of of spots/leaf.<br />

The best control was recorded in Benlate-treated plots. [THH]<br />

*0401 Haware, M.P. ; Pavgi, M.S. 1977. Cytology of chlamydospore<br />

germination and in vitro development of Protomycopsis species. CARYOLOGIA,<br />

v.30(3):313-331. [En] [En Abst] (REP.MB-2443)<br />

Observations are described on the nuclear behaviour relative to the<br />

chlamydospore germination, sporogenesis and in vitro chlamydospore development<br />

in Protomycopsis patelii Pavgi and Thirumalachar and Protomycopsis<br />

thirumalacharii Pavgi, respectively parasitic on Vigna mungo and Sesbania<br />

grandiflora Pers. Taxonomy and phylogenetic relationship of the genus<br />

102

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