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Author : Ng Kee Kwong, K. F.; Huang, P. M.
Title : Surface reactivity of aluminium hydroxides precipitated in the presence of low molecular weight organic acids
Year of publication : 1979
Keywords : CHEMICAL ANALYSIS; ALUMINIUM HYDROXIDE; CHEMISTRY; MSIRI STAFF; CHEM; ;
Citation : Ng Kee Kwong, K. F.; Huang, P. M.; Surface reactivity of aluminium hydroxides precipitated in the presence of low molecular weight organic acids; 1979
Location : LIB
Source : Soil Sci. Soc. Am. J.; 43, 1107-1113
Author : Ng Kee Kwong, K. F.; Huang, P. M.
Title : The relative influence of low molecular weight complexing organic acids on the hydrolysis and precipitation of aluminium
Year of publication : 1979
Keywords : ALUMINIUM; HYDROLYSIS; ANALYTICAL METHODS; CHEMISTRY; MSIRI STAFF; CHEM; ;
Citation : Ng Kee Kwong, K. F.; Huang, P. M.; The relative influence of low molecular weight complexing organic acids on the hydrolysis and precipitation of aluminium; 1979
Abstract : The stability constants of the complexes of aluminum and the low-molecular-weight organic acids decreased in the order : citric acid malic acid tannic acid aspartic acid p-hydroxybenzoic acid. This order of affinity of organic ligands to aluminum was in agreement with the sequence of the effectiveness of the organic acids to hinder and perturb the normal course of hydrolytic and precipitation reaction of aluminum. In systems where organic acids were present in varying concentrations, the hindrance to the hydrolytic reactions of aluminum increased with the increasing concentration of organic acids present during aluminum transformation.
Location : LIB
Source : Soil Sci.; 128, 337-342
Author : Pillay, A. R.
Title : The correlation of Diuron (DCMU) phytotoxicity with soil factors by algal and oats bioassays
Year of publication : 1979
Keywords : SOILS; DIURON; HERBICIDES; WEED CONTROL; MSIRI STAFF; FC; MAURITIUS;
Citation : Pillay, A. R.; The correlation of Diuron (DCMU) phytotoxicity with soil factors by algal and oats bioassays; 1979
Abstract : Chlorella (NM 1) algal bioassay and oats pot trials were used to study the effects of five soil factors on the toxicity of diuron in soil. Correlation and regression analyses of the results showed that diuron toxicity in soil was closely related to organic carbon content and to percentage of herbicide adsorbed. Clay and silt did not seem to affect the toxicity of diuron. From the regression studies, it was concluded that recommendation of dosages of diuron based on soil organic carbon content could be acceptable. However, recommendations based on adsorption values, which accounted for 96 per cent of the variability in ED 50 values, would be more reliable for the soils studied. A statistical comparison of data from algae and oats assays showed that the rapid algal bioassay could replace higher plant assays in the study of adsorption of herbicides and their dosage recommendations.
Location : LIB
Source : Revue agric. sucr. Ile Maurice; 58(3), 153-157
Author : Ricaud, C.; Autrey, L. J. C.
Title : Identity and importance of sugarcane rust in Mauritius
Year of publication : 1979
Keywords : SUGARCANE; PUCCINIA; RUST DISEASES; PUCCINIA KUEHNII; DISEASES; FUNGAL DISEASES; MSIRI STAFF; PATH; MAURITIUS;
Citation : Ricaud, C.; Autrey, L. J. C.; Identity and importance of sugarcane rust in Mauritius; 1979
Abstract : The pathogen responsible for a recent outbreak of sugarcane rust in Mauritius was identified as Puccinia erianthi Padw. and Khan (=P. melanocephala H. and P. Syd.) from measurements of teleutospores and urediospores. The disease is not considered to be economically important.
Location : LIB
Source : Sug. Cane Path. Newsl.; 22, 15-16
Author : Ricaud, C.; Felix, S.
Title : Identification and relative importance of virus diseases of maize in Mauritius
Year of publication : 1979
Keywords : MAIZE; PLANT VIRUSES; IDENTIFICATION; MAIZE DWARF MOSAIC VIRUS; MAIZE STREAK VIRUS; MAIZE MOSAIC VIRUS; DISEASES; MSIRI STAFF; PATH; MAURITIUS;
Citation : Ricaud, C.; Felix, S.; Identification and relative importance of virus diseases of maize in Mauritius; 1979
Abstract : Five virus diseases were identified in Mauritius: Maize streak, maize mosaic, maize stripe, maize line and maize dwarf mosaic virus. Maize streak, which is transmitted by Cicadulina mbila and also occurs on several Graminaceae is by far the most important, causing severe losses in some localities. Maize hybrids imported from Europe which are at present recommended for planting in cane interlines are very susceptible. Of the three Peregrinus transmitted viruses, maize mosaic virus, a bacilliform virus was isolated while the two others, maize stripe and maize line virus were identified by symptomatology and serology. Maize dwarf mosaic virus which is mechanically transmissible was also isolated.
Location : FC
Source : Technical Communication, 42; p.105-109
Author : Ricaud, C.; Felix, S.
Title : Sources and strains of streak virus infecting graminaceous hosts
Year of publication : 1979
Keywords : TRANSMISSION; MAIZE; SUGARCANE; SUGARCANE STREAK VIRUS; DISEASES; PLANT VIRUSES; MSIRI STAFF; PATH; MAURITIUS;
Citation : Ricaud, C.; Felix, S.; Sources and strains of streak virus infecting graminaceous hosts; 1979
Abstract : Streak virus disease was identified by electron microscopy and/or transmission tests with the vector Cicadulina mbila in nine grass hosts in addition to maize and sugarcane. Cross-infection tests with isolates from eight hosts revealed the existence of s
Source : ; p. 23
Author : Ricaud, C.; Autrey, L. J. C.; Sullivan, S.
Title : Reaction of noble canes, foreign and local varieties to gumming disease in Mauritius
Year of publication : 1979
Keywords : SUGARCANE; XANTHOMONAS CAMPESTRIS; GUMMOSIS; DISEASES; BACTERIAL DISEASES; MSIRI STAFF; PATH; MAURITIUS;
Citation : Ricaud, C.; Autrey, L. J. C.; Sullivan, S.; Reaction of noble canes, foreign and local varieties to gumming disease in Mauritius; 1979
Location : LIB
Source : Sug. Cane Path. Newsl.; 23, 11-14
Author : Ricaud, C.; Felix, S.; Ferré, P.
Title : A simple serological technique for the precise diagnosis of leaf scald disease in sugar cane
Year of publication : 1979
Keywords : SUGARCANE; DISEASES; DIAGNOSTIC TECHNIQUES; XANTHOMONAS ALBILINEANS; MSIRI STAFF; PATH; LEAF SCALD; MAURITIUS;
Citation : Ricaud, C.; Felix, S.; Ferré, P.; A simple serological technique for the precise diagnosis of leaf scald disease in sugar cane; 1979
Abstract : The presence of Xanthomonas albilineans in sugarcane was found to be detectable by a serological technique involving microagglutination tests on centrifuged exudates from leaf or stalk tissues. The technique provides means of reliable diagnosis of leaf scald disease when plant symptoms are not clear.
Source : ; p.337-340
Author : Ricaud, C.; Sullivan, S.; Soopramanien, G. C.; Julien, M. H. R.
Title : Canopy penetration of agro-chemicals sprayed by helicopter in sugarcane
Year of publication : 1979
Keywords : SUGARCANE; AERIAL SPRAYING; DEVELOPMENT; FUNGICIDES; CERCOSPORA KOEPKEI; PHYSIOLOGY; MSIRI STAFF; PATH; BOT; YELLOW SPOT; MAURITIUS;
Citation : Ricaud, C.; Sullivan, S.; Soopramanien, G. C.; Julien, M. H. R.; Canopy penetration of agro-chemicals sprayed by helicopter in sugarcane; 1979
Abstract : The distribution of the fungicide Benlate on the leaves of sugarcane vars. S17 and M13/56 after application by helicopter was assessed. Spraying was performed by a Bell 45 G helicopter fitted with a combination of D8 and D10 hollow cone nozzles (Spraying Systems Co.) with D45 whirl plates. Application rate was 70 l/ha at 32 psi and droplet size was in the range of 350 to 750 µm. The flying speed was 88 kph and spraying was at 2 metres above the cane canopy. A phosphorescent chemical was added to the spray mixture. The fungicide was found over the ten uppermost leaves of both varieties but distribution was better in M13/56. No difference was found between the coverage of flowered and vegetative canes in variety S17. The distribution of the chemical, which has a translaminar action, was considered to be adequate for satisfactory control of yellow spot diseases.
Location : LIB
Source : Sug. Cane Path. Newsl.; 23, 38-41
Author : Rouillard, G.
Title : Obélisque Lienard
Year of publication : 1979
Keywords : HISTORY; MSIRI STAFF; MONUMENT; MAURITIUS;
Citation : Rouillard, G.; Obélisque Lienard; 1979
Location : LIB
Source : ; p. 103-109