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YELLOW DWARF DISEASE IN RATOON RICE 221Table 1. Yellow dwarf disease incidence in main and ratoon rice crops, 1979 (33).Variety/selectionMain crop% incidenceRatoon cropMR363GamasoluHY256MR359IET1785RP 974-5-7-6-2HY258MR161IET3280HY25-10Y4MR343MR292A200IET1444MR367IET2700MR18MR362MA261MR360ADT 32IET4702IET3626IET2295I Sona0.000.000.000.000.000.000.000.000.000.000.000.711.071.072.860.362.141.421.070.7111.508.001.0715.0010.002.500.000.000.000.711.071.071.422.142.873.213.935.716.427.868.5710.3512.5013.2114.2814.6425.0030.0035.0045.0062.0071.50laboratory by leafhopper inoculation. Lines that resisted infection can be used inbreeding for disease resistance.RESISTANCE TO VECTORSOf several varieties tested, MTU 17 was most tolerant of infestation by N. virescensfollowed by IR8 and Pankhari 203; Pikutokumoto showed least tolerance (25).N. cincticeps showed nonpreference for the highly resistant rice varieties Firoz-1,Kalbara, and C4-63A (4).EPIDEMIOLOGYIn India the leafhopper ( N. virescens and N. nigropictus ) population in the field washigh from July to September in Delhi (24), April to September in Bihar (15), andMay to June and October to November in Karnataka (35). Disease incidence waslow in the crops transplanted from January to April. Disease incidence wascorrelated with the vector population. Field collection of leafhoppers in the ratooncrop showed that 4% of them carried the disease. Wherever there is continuouscropping, these active transmitters carry the disease from one season to the other.There was steady increase in the incidence throughout the growth of the first ratoon,peaking in the second ratoon (35). Ninety percent of leafhoppers in epidemic fields inFaizabad (Uttar Pradesh, India) were viruliferous (24).
222 RICE RATOONINGTable 2. Yellow dwarf incidence in ratoon rice crop, 1984-85.Variety/SelectionCT43CT57CT1351-1CT1351-2DoddabyraGandsaliHR35lntan MahsuriIET5975KMP104China 5CT36Intan MutantHP3 (Neela)ACM 7HP2 (Nag)CR263-506KBCP-1 (Hema)S 317 (Halubbalu)Fu Mein HuangFu Men HuanHP8Chun-Chen-2HP5 (Sharavathi)MangalaACM 5CT97Jeerige sannaPankhari 203PhalgunaIR50PragathiVL-8Che-Eu-HungTainung Sen YuHP1 (Nandhi)Z-Yah-TsanCH2Cold AMBT-2CT67ADT14185MR365MadhuRasiChina 1039IR9202-25-1-3HP12ACM 6KMP106IET1522Mandya Vani% incidence0.000.000.000.000.000.000.000.000.000.001.001.091.041.041.832.002.062.503.333.333.353.503.503.634.505.005.005.005.005.005.005.005.006.327.107.508.2210.0010.0010.0010.0010.0010.0010.6410.7812.8713.5015.0015.0020.0020.00CAUSAL AGENTA mycoplasma-like organism was found in the phloem sieve tubes of yellowdwarf-infected rice plants (21, 40). Remission of symptoms was achieved by treatinginfected plants with oxytetracycline hydrochloride and chlortetracycline at 100-500ppm by wick feeding and 250-1500 ppm by spraying (34).
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RICERATOONING1988INTERNATIONAL RICE
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ContentsForewordWelcome 1OverviewRi
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Genetics and varietal improvementIn
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2 RICE RATOONINGthe main crop. Harv
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4 RICE RATOONINGTable 1. Area, prod
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6 RICE RATOONINGTable 2. Rice varie
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8 RICE RATOONING1. Effect of spacin
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10 RICE RATOONINGHowever, no signif
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12 RICE RATOONINGrelating to seed v
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14 RICE RATOONING5. Cultivars that
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Economic perspectivesof rice ratoon
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ECONOMIC PERSPECTIVES OF RICE RATOO
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32 RICE RATOONINGla) Developmental
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34 RICE RATOONINGCutting heightStub
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36 RICE RATOONINGEarly flooding enc
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38 RICE RATOONING2. Factors affecti
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40 RICE RATOONING27. Nair, N.R., an
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42 RICE RATOONING1. Changes in till
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44 RICE RATOONINGTable 2. Character
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46 RICE RATOONING9. International R
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48 RICE RATOONINGplot size is 6 row
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50 RICE RATOONINGimproved ratooning
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52 RICE RATOONINGTable 6. Simple co
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Utilization of rice ratooningby far
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RICE RATOONING IN RIO DE JANEIRO 57
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RICE RATOONING IN RIO DE JANEIRO 59
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Rice ratooningin the Dominican Repu
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RICE RATOONING IN THE DOMINICAN REP
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89111306514772Special points Refere
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72 RICE RATOONINGANDHRA PRADESHBasu
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74 RICE RATOONINGrice observed at t
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76 RICE RATOONINGTAMIL NADUBalasubr
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78 RICE RATOONING19. Reddy, T.G., M
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80 RICE RATOONING1. Rice-growing re
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82 RICE RATOONING2. High cutting he
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84 RICE RATOONINGTable 3. Yield tri
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Rice ratoon crop managementin the h
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RICE RATOON CROP MANAGEMENT IN KARN
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23123722821721922222421423122421722
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98 RICE RATOONING1. The Tungabhadra
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100 RICE RATOONINGthe results of po
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102 RICE RATOONINGTable 4. Effect o
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Ratoon rice researchin Karnataka, I
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RATOON RICE RESEARCH IN KARNATAKA 1
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RATOON RICE RESEARCH IN KARNATAKA 1
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112 RICE RATOONINGTable 1. Area and
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114 RICE RATOONINGonly 7.5-49.7% of
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116 RICE RATOONINGTable 5. Relation
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Scope for rice ratoon croppingin th
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RATOON CROPPING IN NORTHEASTERN IND
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Scope for rice ratoon croppingin th
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RATOON CROPPING IN CENTRAL AND NORT
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RATOON CROPPING IN CENTRAL AND NORT
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Potential of rice ratooningin Madag
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RICE RATOONING IN MADAGASCAR 131a.
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RICE RATOONING IN MADAGASCAR 133Tab
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Potential for rice ratooningin east
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RICE RATOONING IN EASTERN INDIA 137
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Ratooning in Bangladesh:prospects a
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RATOONING IN BANGLADESH 145RATOON C
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RATOONING IN BANGLADESH 147Table 4.
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RATOONING IN BANGLADESH 149OTHER FA
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152 RICE RATOONINGTable 1. Hybrid s
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154 RICE RATOONINGThe studies sugge
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156 RICE RATOONINGVARIETIES AND CUL
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158 RICE RATOONINGspikelet primordi
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160 RICE RATOONINGTable 5. Effect o
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Agronomic principles and practiceso
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AGRONOMIC PRINCIPLES AND PRACTICES
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Page 178 and 179: AGRONOMIC PRINCIPLES AND PRACTICES
Page 184 and 185: Rice ratooning: breeding,agronomic
Page 186 and 187: BREEDING, AGRONOMIC PRACTICES, AND
Page 192: BREEDING, AGRONOMIC PRACTICES, AND
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Page 197 and 198: 190 RICE RATOONINGRESULTSMain crop
Page 199 and 200: 192 RICE RATOONINGRatoon tiller reg
Page 201 and 202: 194 RICE RATOONING9. Rister, M. E.,
Page 203 and 204: 196 RICE RATOONINGExcept for rice w
Page 205 and 206: 198 RICE RATOONINGInsect survivorsh
Page 207 and 208: 200 RICE RATOONING1. Stem borer occ
Page 209 and 210: 202 RICE RATOONING3. Population dyn
Page 211 and 212: 204 RICE RATOONING2, 3). Microvelia
Page 213 and 214: 206 RICE RATOONINGplant chemicals a
Page 215 and 216: 208 RICE RATOONING17. Krishnamurthy
Page 217 and 218: 210 RICE RATOONING1. Yellow dwarf c
Page 219 and 220: 212 RICE RATOONING3. The effect of
Page 221 and 222: 214 RICE RATOONINGAlthough the inte
Page 223 and 224: 216 RICE RATOONINGTable 6. Sheath b
Page 226 and 227: Yellow dwarf disease in ratoon rice
Page 230 and 231: YELLOW DWARF DISEASE IN RATOON RICE
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Page 235 and 236: 228 RICE RATOONINGTable 1. Estimate
Page 237 and 238: Main crop a Ratoon crop b53.956.155
Page 240 and 241: Disease and insect pestsand their c
Page 242 and 243: DISEASE AND INSECT PESTS IN RICE RA
Page 244 and 245: DISEASE AND INSECT PESTS IN RICE RA
Page 246 and 247: Inheritance of ratooning abilityin
Page 248 and 249: INHERITANCE OF RATOONING ABILITY IN
Page 250 and 251: INHERITANCE OF RATOONING ABILITY IN
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Page 255 and 256: 248 RICE RATOONINGShould the season
Page 257 and 258: 250 RICE RATOONINGYield and yield-c
Page 259 and 260: 252 RICE RATOONINGMain-crop photosy
Page 261 and 262: 254 RICE RATOONINGShort-termGiven t
Page 264 and 265: Commercial ratoon rice productionin
Page 266 and 267: COMMERCIAL RATOON RICE PRODUCTION I
Page 268 and 269: COMMERCIAL RATOON RICE PRODUCTION I
Page 270: COMMERCIAL RATOON RICE PRODUCTION I
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Page 275 and 276: 268 RICE RATOONING1. Path analysis
Page 277 and 278: 270 RICE RATOONINGRecommendationsVa
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ParticipantsT. AhmedRice Experiment
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Varietal indexA200, 221Achra 108/1,
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VARIETAL INDEX 277IR2061-465-1, 12I
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VARIETAL INDEX 279RU7502006, 49, 51
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