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Articles

IMPROVED METHODS OF ANALYSIS FOR CYANIDE IN CASSAVA AND SCREENING FOR LOW CYANIDE VARIETIES IN THE PACIFIC

Article number

380_37

Pages

237 – 242

Language

Abstract

The autolysis of linamarin by endogenous linamarase extracted from cassava tubers by blending at pH 6 was studied.
The autolysis of linamarin was measured for various tubers and it was found that the speed of autolysis increased with increase in linamarase activity.
An autolysis time of 24 h at pH 6 was sufficient to cause complete breakdown of linamarin, except at the very lowest linamarase activity.
No correlation was found between the total cyanide content and linamarase activity of cassava parenchyma.
Screening of 39 cultivars from Australia and Vanuatu has shown 10 cassava cultivars which contain < 2 mg HCN/100 g fresh tuber.

Publication

Symposium on Tropical Root Crops in a Developping Economy

Authors

J. Howard Bradbury, Sylvia V. Egan

Keywords

Full text

https://doi.org/10.17660/ActaHortic.1994.380.37

Online Articles (113)

2. DEVELOPMENT AND DISSEMINATION OF APPROPRIATE ROOT CROPS PACKAGES TO FARMERS IN AFRICA

3. ROOT AND TUBER CROPS IN ASIA-PACIFIC REGION: CONSTRAINTS TO PRODUCTION AND UTILIZATION

S.P. Ghosh

4. CONTRIBUTIONS OF ROOT AND TUBER CROPS TO SOCIOECONOMIC CHANGES IN THE DEVELOPING WORLD: THE CASE OF AFRICA, WITH SPECIAL EMPHASIS ON GHANA

S.K. Dapaah

5. BRIDGING THE RESEARCH-FARM GAP FOR ROOT CROPS IN ADAMAOUA PROVINCE OF NORTHERN CAMEROON

M.O. Akoroda

6. CONTRIBUTIONS OF TROPICAL ROOT CROPS TO SOCIOECONOMIC IMPROVEMENT OF THE DEVELOPING WORLD

S. Chandra

7. CONTRIBUTIONS OF IMPROVED CASSAVA AND SWEET POTATO VARIETIES TO THE SOCIOECONOMIC CHANGES IN SOME RURAL AREAS OF CAMEROON

J. Ambe-Tumanteh

8. COLLABORATION BETWEEN NATIONAL AGRICULTURAL RESEARCH SYSTEMS, INTERNATIONAL AGRICULTURAL RESEARCH CENTERS, AND FUNDING AGENCIES FOR TECHNOLOGY DEVELOPMENT AND TRANSFER: THE CASE OF THE CAMEROON NATIONAL ROOT CROPS IMPROVEMENT PROGRAM

J.A. Ayuk-Takem | S.N. Lyonga | J.M. Ngeve

9. AN ANALYSIS OF THE CONSTRAINTS IN THE DELIVERY SYSTEMS FOR TROPICAL ROOT AND TUBER CROPS

I.C. Onwueme

10. AN EVALUATION OF THE LEVEL OF FEMALE PARTICIPATION IN CASSAVA AND SWEET POTATO ON-FARM TRIALS AND DEMONSTRATIONS IN SIERRA LEONE

B. N. Lahai

11. GENOTYPE EVALUATION FOR INTERCROPPING SYSTEMS

D.S.O. Osiru | H.C. Ezumah

12. EFFECTS OF FERTILIZER AND TIME OF INTRODUCTION OF CASSAVA IN YAM/MAIZE/CASSAVA INTERCROP ON COMPONENT YIELDS

S.O. Odurukwe | J.E.G. Ikeorgu

13. POTENTIAL UTILIZATION OF TUBERS FROM THREE TROPICAL ROOT CROPS IN PREPARING DEHYDRATED MYCOLOGICAL MEDIA

R.T. Awuah

14. ENZYMATIC STARCH EXTRACTION FROM TROPICAL ROOT AND TUBER CROPS

J. Kallabinski | C. Balagopalan

15. QUALITY ASPECTS OF TROPICAL ROOT CROP STARCHES

J. Rickard

16. TECHNICAL PERFORMANCE OF A ROOT CROP CHIPPING MACHINE

Y.W. Jeon | L.S. Halos

17. POLYPLOID BREEDING OF CASSAVA

18. INTERSPECIFIC HYBRIDIZATION IN THE GENUS MANIHOT—PROGRESS AND PROSPECTS

R. Asiedu | S.K. Hahn | K. Vijaya Bai | A.G.O. Dixon

N.M. Mahungu | H.R. Chheda | M.E. Aken'Ova | S.K. Hahn

20. AN AGROECOLOGICALLY-ORIENTED INTRODUCTION OF CASSAVA GERMPLASM FROM LATIN AMERICA INTO AFRICA

M.C.M. Porto | R. Asiedu | A. Dixon | S.K. Hahn

21. GENOTYPIC STABILITY AND ADAPTABILITY: ANALYTICAL METHODS AND IMPLICATIONS FOR CASSAVA BREEDING FOR LOW-INPUT AGRICULTURE

A.G.O. Dixon | R. Asiedu | S.K. Hahn

22. YIELD STABILITY PARAMETERS FOR COMPARING CASSAVA VARIETIES

J.M. Ngeve

23. GENOTYPE X ENVIRONMENT INTERACTION STUDIES WITH CASSAVA

24. CASSAVA BREEDING AT CIAT: HERITABILITY ESTIMATES AND GENETIC PROGRESS IN THE 1980S

Carlos A. Iglesias | Clair H. Hershey

25. TRUE CASSAVA SEED: RESEARCH FOR A PRODUCTION ALTERNATIVE

Carlos A. Iglesias | Clair H. Hershey

26. GERMINATION OF CASSAVA (MANIHOT ESCULENTA CRANTZ) POLLEN

R.E. Mbahe | M.E. Aken'Ova | S.K. Hahn

27. SCREENING CASSAVA CULTIVARS FOR RESISTANCE TO THE CASSAVA ANTHRACNOSE DISEASE (CAD)

T. Ikotun | S.K. Hahn

28. LES POURRIDIÉS DU MANIOC AU CONGO : PREMIÈRE EVALUATION DES DEGATS SUR LE MANIOC ET IDENTIFICATION DES AGENTS PATHOGÈNES

C. Makambila | Bakala L. Koumouno

29. A COMPARISON OF CYANIDE ACCUMULATION, LEAF RETENTION AND LINAMARASE ACTIVITY OF CASSAVA VARIETIES DURING WATER STRESS

L.A. Nwosu | F.A. Onofeghara

30. INTERCROP YIELDS OF CASSAVA AND RICE AS INFLUENCED BY CASSAVA VARIETY AND POPULATION

M.T. Dahniya | A. Jalloh | H.C. Ezumah

31. PRODUCTION OF CASSAVA-RICE INTERCROP AS INFLUENCED BY CASSAVA VARIETY AND TIME OF INTRODUCING RICE INTO CASSAVA

A. Jalloh | M.T. Dahniya | H.C. Ezumah

32. AMENDEMENTS CALCAIRES DYNAMIQUE DU PHOSPHORE ET NUTRITION PHOSPHORIQUE DU RIZ ET DU MANIOC DANS LES SOLS ACIDES DU CONGO

D. Dzaba

33. PRODUCTIVITY OF NIGERIA’S ELITE CASSAVA CULTIVARS GROWN IN MIXTURE WITH CONTRASTING MAIZE GENOTYPES

J.E.G. Ikeorgu | S.O. Odurukwe

34. A SURVEY OF CASSAVA CULTIVATION PRACTICES GHANA

C. Annor-Frempong

35. CONTRIBUTION À L’ÉTUDE DU MANIOC PIGMENTATION JAUNE AU CONGO

E.B. Dongala | G. Maloumbi | C. Badila-Samba | C. Nzobo

36. CASSAVA BASED FOODS: HOW SAFE ARE THEY?

M. Bokanga | E. Otoo

37. ISSUES OF CASSAVA CYANIDE: NIGERIA’S EXPERIENCE

G.O. Obigbesan

38. IMPROVED METHODS OF ANALYSIS FOR CYANIDE IN CASSAVA AND SCREENING FOR LOW CYANIDE VARIETIES IN THE PACIFIC

J. Howard Bradbury | Sylvia V. Egan

39. ALTERNATIVE BREADS FROM CASSAVA FLOUR

G. Eggleston | P. Omoaka

40. IMPORTANCE OF FERMENTATION IN CASSAVA PROCESSING

A. Westby

41. GARI PROCESSING IN IBADAN METROPOLIS: FACTORS CONTROLLING QUALITY AT THE SMALL-SCALE LEVEL

M. Olayinka Sanni

42. UPGRADING TRADITIONAL CASSAVA FERMENTATION THROUGH PROCESS IMPROVEMENT

O. B. Oyewole

43. POSSIBILITÉS D’UTILISATION DU MANIOC DANS L’ALIMENTATION DES POULETS DE CHAIR : VALEUR NUTRITIONNELLE ET CONTRAINTES ECONOMIQUES

Y.O. Tiémoko

44. A COMPARATIVE STUDY OF SOLAR AND OPEN SUNDRYING OF CASSAVA CHIPS IN UGANDA

W. R. Odogola

45. CASSAVA DRYING IN A WOOD-FIRED DEEP-BED CROP DRYER

A. K. Dzisi | J. Wirth

46. DEVELOPMENT OF A CASSAVA CHIPPING MACHINE

O.O. Ajibola | M.O. Faborode | T.K. Salami | B.S. Okpe

47. LATEST FINDINGS ON THE HARVEST OF CASSAVA ROOTS ACCORDING TO THE DIG AND PULL PRINCIPLE

L. Peipp | E. Mahnert | R. Neumann

48. INFLUENCE DE L’URBANISATION SUR LA CONSOMMATION DE LA CHIKWANGUE AU CONGO

J. Massamba | S. Treche

49. IMPACT OF INTEGRATED CASSAVA PROJECTS AMONG SMALL-SCALE FARMERS IN SELECTED LATIN AMERICAN COUNTRIES

G. Henry | R. Best

50. CASSAVA PRODUCTION TRENDS IN AFRICA

Felix I. Nweke | R. Polson | J. Strauss

51. PRODUCTION AND DISTRIBUTION OF VIRUS-FREE YAM (DIOSCOREA ROTUNDATA POIR.)

S.Y.C. Ng

52. CARBON SOURCE REQUIREMENT FOR THE CULTURE OF WHITE YAM (DIOSCOREA ROTUNDATA) EMBRYOS IN VITRO

C.E.A. Okezie | S.N.C. Okonkwo | F.I.O. Nwoke

53. DETERMINATION OF OPTIMUM SETT SIZE FOR WHITE GUINEA YAM (DIOSCOREA ROTUNDATA POIR.) SEED YAM PRODUCTION: TRENDS IN SPROUTING IN THE PRESPROUT NURSERY AND FIELD PERFORMANCE

C.E. Gyansa-Ameyaw | S.K. Hahn | N.M. Alvarez | E.V. Doku

54. MANIPULATION OF CULTURAL FACTORS TO INCREASE MICROTUBER SIZE AND FREQUENCY IN SHOOT CULTURES OF FOOD YAM, DIOSCOREA ALATA L. CV. ORIENTAL LISBON

A.Y. Alhassan | S.H. Mantell

55. THE RESPONSE OF YAM (DIOSCOREA ROTUNDATA POIR.) TO VARIOUS PERIODS OF WEED INTERFERENCE IN AN INTERCROPPING WITH MAIZE (ZEA MAYS L.), OKRA (ABELMOSCHUS ESCULENTUS L. MOENCH), AND SWEET POTATO (IPOMOEA BATATAS L. LAM)

56. PROSPECTS AND CONSTRAINTS TO YAM PRODUCTION IN GHANA

J.P. Tetteh | C. Saakwa

57. THE SUITABILITY OF GLIRICIDIA SEPIUM IN-SITU LIVE STAKE ON THE YIELD AND PERFORMANCE OF WHITE YAM (DIOSCOREA ROTUNDATA)

O.I. Otu | A.A. Agboola

58. AN ECONOMIC EXAMINATION OF CONSTRAINTS AND OPPORTUNITIES IN YAM (DIOSCOREA SPP.) PRODUCTION IN FAKO DIVISION, CAMEROON

E. T. Acquah | Nganje W. Evange

59. THE ECONOMICS OF YAM (DIOSCOREA SPP.) PRODUCTION IN CAMEROON: THE CASE OF FAKO DIVISION

E.T. Acquah | Nganje W. Evange

60. ECONOMICS OF SEED YAM PRODUCTION FROM MINISETTS IN UMUDIKE IN SOUTHEASTERN NIGERIA: IMPLICATIONS FOR COMMERCIAL GROWERS

N.O.A. Ezeh

61. YAM FOR FOREIGN EXCHANGE: POTENTIALS AND PROSPECTS IN GHANA

S. Asuming-Brempong

62. THE ROLE OF THE WILD IPOMOEA TRIFIDA GERMPLASM IN SWEET POTATO BREEDING

I. Shiotani | Z.Z. Huang | S. Sakamoto | T. Miyazaki

63. BIOLOGY AND PHEROMONE STUDIES WITH THE SWEET POTATO WEEVILS: CYLAS PUNCTICOLLIS (BOHE.) AND C. BRUNNEUS (FABR.)

N.E.J.M. Smit | O. Magenya | B.L. Parker

64. SWEET POTATO IN THE FOOD SYSTEMS OF EASTERN AND SOUTHERN AFRICA

Peter T. Ewell | J. Mutuura

65. DEVELOPMENT AND TRANSFER OF PROCESSING TECHNOLOGIES FOR FRUITY FOOD PRODUCTS FROM SWEET POTATO

V. Truong

66. THE EFFECT OF CHILL INJURY ON THE PROCESSING OF SWEET POTATO FOR PUREE

Paul W. Wilson | David H. Pichal | M. Ameny

67. SWEET POTATO UTILIZATION IN POULTRY DIETS

O. O. Tewe

68. THE GENETICS OF RESISTANCE TO COCOYAM ROOT ROT BLIGHT COMPLEX DISEASE IN XANTHOSOMA SAGITTIFOLIUM (L.) SCHOTT

A. Agueguia | C.A. Fatokun | S.K. Hahn

69. IN VITRO PRESERVATION OF COCOYAM GERMPLASM UNDER REDUCED TEMPERATURE AND LIGHT CONDITIONS

E. Acheampong

70. COCOYAM (XANTHOSOMA SAGITTIFOLIUM SCHOTT [L.]) HYBRIDIZATION STUDIES: POLLEN VIABILITY AND SEED GERMINATION

J.T. Tambong | M. Meboka

71. ALAFUA SUNRISE AND SAMOA HYBRID IMPROVE THE PRODUCTION OF TARO (COLOCASIA ESCULENTA [L] SCHOTT) IN THE PACIFIC

Jill E. Wilson | P. Sivan | C. Munroe

72. FIELD EVALUATION OF COCOYAM (XANTHOSOMA SAGITTIFOLIUM (L) SCHOTT) FOR TOLERANCE TO THE ROOT ROT DISEASE CAUSED BY PYTHIUM MYRIOTYLUM

J.G. Wutoh | J.T. Tambong | M.M. Meboka | S. Nzietchueng

73. MACABO ROOT ROT DISEASE IN CAMEROON: KNOWLEDGE, OCCURRENCE, AND INCIDENCE IN FAKO DIVISION

E.T. Acquah | A. Nnoung | A. Mbassa | J.C. Mboua

74. GROWTH AND DEVELOPMENT OF XANTHOSOMA AND COLOCASIA SPP. UNDER DIFFERENT SPACINGS

O. Safo-Kantanka | V. Boateng | E.B. Chamba

75. INFLUENCE OF VARIETY, MATURITY AT HARVEST, CHLORINATION, AND PACKAGING ON COCOYAM (XANTHOSOMA SPP.) IN STORAGE

M.R. Bikomo

76. POTATO PRODUCTION FROM TRUE POTATO SEED

L.C. Sikka | A.S. Bhagari | J.M. Ssebuliba | R. Kanzikwera

77. THE DEVELOPMENT OF POTATO PRODUCTION IN AFRICA AND PERSPEDTIVES OF LOW-COST POTATO PROCESSING TECHNOLOGY

J. Geertsema

78. EFFECT OF FUNGICIDES ON LATE BLIGHT AND YIELD OF POTATO IN THE WEST PROVINCE OF CAMEROON

D.A. Fontem | B. A. Aighewi

79. EFFECT OF CROP COVER ON GROWTH AND YIELD OF POTATO (SOLANUM TUBEROSUM)

C. M. Tankou | B. Aighewi

80. DELETERIOUS INFLUENCE OF WATER-LOGGING ON POTATO IN WARM CLIMATES

I.J. Ekanayake

81. LES CONTRAINTES LIÉES A LA DIFFUSION DE LA TECHNIQUE AMELIORÉE DE PRODUCTION DESEMENCEAUX D’IGNAME

A. N'Kay

82. THE DEVELOPMENT OF A CASSAVA PROGRAM IN LIBERIA AND DISSEMINATION OF APPRORIATE PACKAGES TO FARMERS

M. A-AS-Saqui

83. FACTORS INFLUENCING THE ADOPTION OF YAM MINISETT TECHNOLOGY AMONG FARMERS IN NIGERIA

C.C. Asiabaka

84. SWEET POTATO: A SOURCE OF INCOME FOR LOW-INCOME RURAL FAMILIES IN UGANDA

B. Bashaasha | R.O.M. Mwanga

85. SEED POTATO (SOLANUM SPP.) PRODUCTION USING APICAL CUTTINGS AND TUBERCLES IN KENYA

C. Carli | P.K. Njoroge | C.M. Makwa

86. THE GROWTH BEHAVIOR OF SOME LINAMARIN-HYDROLYSING MICROORGANISMS IN THE CYANIDE MEDIUM OF FERMENTING CASSAVA PULP

M.A.N. Ejiofor

87. DEVELOPMENT OF POTATO (SOLANUM TUBEROSUM) VARIETIES WITH RESISTANCE TO LATE BLIGHT (PHYTOPHTHORA INFESTANS) FOR THE HIGHLANDS OF CAMEROON

C. Martin | D. Njualem

88. SURVEY AND IDENTIFICATION OF POTATO VIRUSES IN THE WESTERN HIGHLANDS OF CAMEROON

V.N. Fondong | C. Ntonifor | T. Gass

89. PRELIMINARY STUDIES ON THE EFFECTS OF PLANTING PATTERN AND PLANT SPACING ON YIELD COCOYAM (XANTHOSOMA SAGITTIFOLIUM)

G.K. Hotsonyame | E.K.S. Ahiekpor

90. LE VIRUS DE LA MOSAÏQUE DE L’IGNAME AU TOGO

M.Y. Gumedzoe

91. PERFORMANCE OF SWEET POTATO GERMPLASM AT MID-ELEVATIONS IN KENYA

J.W. Irungu | G.M. Karanja | M. Gethi | H.M. Kidanemariam

92. MACABO ROOT ROT DISEASE: KNOWLEDGE, OCCURENCE AND INCIDENCE-A CASE STUDY OF FAKO DIVISION IN CAMEROON

E.T. Acquah | A. Nnoung | A. Mbassa | J.C. Mboua

93. EVALUATION OF CASSAVA VARIETIES AT TWO PLANTING DATES IN MOZAMBIQUE

M. Jorge

94. ON-FARM VERIFICATION OF CASSAVA-BASED INTERCROPPING SYSTEMS IN TANZANIA MAINLAND

R. Kapinga | M. Msabaha | A.K. Nyango

95. SWEET POTATO (IPOMOEA BATATAS L.) YIELD RESPONSE TO FERTILIZER, VINE LENGTH AND TYPE ON FARMERS’ FIELDS

M.T. Lahai | M.T. Dahniya | A.B. Gbani

96. CHANGES IN CYANIDE CONTENT DURING TRADITIONAL PROCESSING OF CASSAVA INTO ¿MAKAKA AND¿ ¿MAPHUMU¿

J.D.K. Saka

97. AFRICAN CASSAVA MOSAIC VIRUS: AN UNSOLVED PROBLEM

J.M. Thresh

98. STORAGE DISEASES OF SWEET POTATO (IPOMOEA BATATAS L.) IN KENYA

A.W. Kihurani | R.W. Gatumbi | L.G. Skoglund

99. EVALUATION OF TRUE POTATO SEED (TPS) PROGENIES FOR SEEDLING-TUBER PRODUCTION UNDER CAMEROON CONDITIONS

C. Ntonifor | C. Martin | P. Demo

100. DU TUBE AUX PLANTULES REPIQUÉEES AU VIETNAM

N. Uyen

101. SWEET POTATO GERMPLASM COLLECTION AND EVALUATION IN THE HIGHLANDS OF NORTHERN PHILIPPINES

L.L. Tandang | E.O. Badol | M.B. Baucas | B.A. Anselmo

102. CHARACTERISATION OF CASSAVA ß-GLUCOSIDASES

H. Yeoh

103. CASSAVA PEEL MEAL AS A FEED INGREDIENT IN CHICKEN DIETS: A REVIEW

S.A. Osei

104. CARACTERISATION DES ISOLATS DE PYTHIUM MYRIOTYLUM, AGENT PATHOGENE DE LA POURRITURE RACINAIRE DU MACABO (XANTHOSOMA SP.) AU CAMEROON

S. Nzietchueng | J. Saghohan

105. PERFORMANCE OF WATER YAM (DIOSCOREA ALATA) UNDER BY VARIUS AGRONOMIC PRACTICES

M. Makame

106. SYSTÈME DE PRODUCTION ET DE DIFFUSION DE VARIÉTIÉSAMELOREES PLANTES À RACINES ET TUBERCULES AU RWANDA

G. Ndamage

107. DIOSCOREA DUMETORUM: A HANDICAPPED BUT POTENTIAL FOOD SOURCE

I. Mbome | T. Egbe

108. INTEGRATION OF NEW BIOTECHNOLOGIES INTO EXISTING SOCIAL ORGANIZATION OF THE DEVELOPING COUNTRIES OF AFRICA FOR SOLVING THE CRISIS IN FOOD PRODUCTION

J.G. Wutoh | J. Zok | M. Meboka | L. Nyonchembeng

109. PERFORMANCE OF EXOTIC AND LOCAL VARIETIES OF CASSAVA (MANIHOT ESCULENTA CRANTZ) IN ECOLOGICAL ZONES IN GHANA

O.O. Okoli | A.F.K. Kissiedu | S.K. Hahn | J.A. Otoo | E. Amas

110. A SURVEY ON NONVIRAL PATHOGENS AND DISORDERS OF SWEET POTATO IN KENYA

L.G. Skoglund | R.W. Gatumbi | A.W. Kihurani

111. CONSTRAINTES LICÉS À LA PRODUCTION ET UTILISATION DES PLANTES À RACINES ET TUBERCULES À MADAGASCAR

B.E. Rakotoarisoa

112. THE PERFORMANCE OF TWO LOCAL YAM (DIOSCOREA SPP) VARIETIES UNDER IMPROVED MANAGEMENT PRACTICE

O. p'Obwoya | B. Mateeka

113. CHEMICAL PROTECTANTS FOR ENCHACED WOUND HEALING AND REDUCED DETERIORATION IN COCOYAM (COLOCASIA ESCULENTA SCHOTT)

M.I. Nwufo | J.C. Obiafoan