Rice tungro disease management - IRRI books - International Rice ...

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Fig. 4. Dendogram depicting the relationships among rice tungro bacilliform virus (RTBV) genotypesat different sites in the Philippines. RTBV genotype frequencies were used to calculate Pearson’scorrelation coefficient between sites, and the correlation matrix was used to construct the dendogram.ConclusionsBased on the EcoRV genome profile assay, RTBV populations are genetically variablein the field. The data showed that more than one RTBV isolate could be found inone location. Even with just two planting seasons studied, results showed that RTBVpopulations exist as a diverse group of variants and are continuously evolving. Thisstudy showed that single isolates from a given location are not necessarily representativeof or specific to that location. Virus populations need to be monitored continuouslyto ensure that varietal screening for deployed rice varieties uses appropriatevirus isolates in the area.ReferencesCabauatan P, Cabunagan R, Koganezawa H. 1995. Biological variants of rice tungro viruses inthe Philippines. Phytopathology 85:77–81,Cabauatan P, Arboleda M, Azzam O. 1998. Differentiation of rice tungro bacilliform virusstrains by restriction analysis and DNA hybridization. J. Virol. Methods 76:121–126.Preliminary analysis 15
NotesAuthors’ address : M. Arboleda, E Sta. Cruz, and O. Azzam. International Rice Research Institute,MCPO Box 3127, Makati City 1271, Philippines.Citation: Chancellor TCB, Azzam O, Heong KL, editors. 1999. Rice tungro disease management.Proceedings of the International Workshop on Tungro Disease Management, 9–11November 1998, IRRI, Los Baños, Philippines. Makati City (Philippines): InternationalRice Research Institute. 166 p.16 Arboleda et al
Page 2 and 3: RiceTungro DiseaseManagementEdited
Page 4 and 5: ContentsRice tungro disease in the
Page 6 and 7: ForewordThe intensification of rice
Page 8 and 9: PrefaceProviding farmers with optio
Page 10 and 11: Rice tungro disease in the Philippi
Page 12 and 13: Cotabato, and Laguna) during 1995-9
Page 14 and 15: seed growers and farmers to increas
Page 16 and 17: Fig. 2. Incidence of rice tungro di
Page 18 and 19: De los Reyes JB, Cabunagan, RC, Col
Page 20 and 21: Preliminary analysis of genetic var
Page 22 and 23: Fig. 2. Distinct rice tungro bacill
Page 26 and 27: Preliminary analysis of genetic var
Page 28 and 29: Table 1. Size characteristics of th
Page 30 and 31: varieties and did not seem to exert
Page 32 and 33: Developing breeding lines with RTD
Page 34 and 35: In CES, 28 entries had low tungro i
Page 36 and 37: Table 2. Best rice tungro disease-r
Page 38 and 39: Breeding for rice tungro virus resi
Page 40 and 41: Table 2. Promising lines resistant
Page 42 and 43: Table 4. Rice cultivars used as hyb
Page 44 and 45: Shahjahan MB, Jalani S, Zakri AH, I
Page 46 and 47: Table 1. Initial 19 transgenic line
Page 48 and 49: Table 4. Percent infection of trans
Page 50 and 51: very low level. In fact, transgene
Page 52 and 53: of Agricultural Research (ICAR). Pr
Page 54 and 55: Fig. 2. Mean infection with rice tu
Page 56 and 57: (RTBV) and rice tungro spherical vi
Page 58 and 59: Table 4. Percent infection a with r
Page 60 and 61: GLH numbers were much lower on IR62
Page 62 and 63: Cabunagan RC, Hibino H, Sama S, Riz
Page 64 and 65: Prospects of virus-resistant variet
Page 66 and 67: Tungro in Bali (1987-97)Tungro infe
Page 68 and 69: Fig. 5. Proportion of varieties gro
Page 70 and 71: Table 3. Percent incidence of rice
Page 72 and 73: Evaluating rice germplasm for resis
Page 74 and 75:
Table 2. Percent infection a with r
Page 76 and 77:
Rice tungro disease resistance andm
Page 78 and 79:
Table 1. Percent infection a with r
Page 80 and 81:
ecommended vector-resistant variety
Page 82 and 83:
Materials and methodsBatches of ant
Page 84 and 85:
ReferencesClark MF, Adams AN. 1977.
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(e.g., Sokal and Rohlf 1995, p 213;
Page 88 and 89:
Surveillance scheme for tungro fore
Page 90 and 91:
entrusted with implementing the pro
Page 92 and 93:
Table 1. Number of mobile nursery t
Page 94 and 95:
are implemented immediately. The co
Page 96 and 97:
Farmers’ rice tungro managementpr
Page 98 and 99:
Experience with tungroAlthough both
Page 100 and 101:
Table 5. Farmers (%) reporting tung
Page 102 and 103:
Table 7. Farmers’ reported tungro
Page 104 and 105:
Table 9. Mean number (standard devi
Page 106 and 107:
than rice), so they may be reluctan
Page 108 and 109:
Community-based rice pest managemen
Page 110 and 111:
Establishment of farmers’ indigen
Page 112 and 113:
Meanwhile, insects, diseases, and n
Page 114 and 115:
Table 2. Most important diseases fo
Page 116 and 117:
Farmers’ knowledge of pest contro
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ha -1 and above) had a lower RTD in
Page 120 and 121:
Fig. 4. Three major peaks of green
Page 122 and 123:
RBB hill -1 and 4% WSB (Fig. 6). In
Page 124 and 125:
The influence of varietal resistanc
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Limited data exist on how resistant
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tember plantings, reaching 13% and
Page 130 and 131:
Holt J, Chancellor TCB, Reynolds DR
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glh4, respectively. Planting at the
Page 134 and 135:
Results and discussionMinimum unit
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Fig. 4. Transmission efficiency of
Page 138 and 139:
Table 1. Enzyme-linked immunosorben
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Leafhopper control by insecticides
Page 142 and 143:
Fig. 1. Cartoon used for tungro man
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The role of vector control in rice
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To establish relationships between
Page 148 and 149:
Fig. 1. Influence of antifeedants o
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Fig. 4. Tungro incidence before har
Page 152 and 153:
ReferencesAryawan IGN, Widiarta IN,
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Materials and methodsSeedbed protec
Page 156 and 157:
Table 2. Relationship of RTD incide
Page 158 and 159:
Management of rice tungro disease b
Page 160 and 161:
Results and discussionGLH populatio
Page 162 and 163:
Table 4. Field evaluation of foliar
Page 164 and 165:
3.6 to 2.7 t ha -1 . These yields w
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