Seed Health Management for Better Productivity - Govind Ballabh ...

More documents

Recommendations

Info

(Seed Health Management for Better Productivity)(i)(ii)Internodes of lower end - Not less than 60 per cent on fresh weight basis.Any other internodes - Not less than 66 per cent on fresh weight basis.12. The number of sugarcane setts showing a pithy area or cavity more than one fourth of thetotal area of the cut end shall not exceed 3 per cent by count of the total number of setts.13. The seed cane crop be inspected a different permissible stages to meet following standerstolerance limit of disease and pest for the commercial seed is as under.Table 2: Field standards (diseases) of seed cane cropS.No. Factors Stage of fieldMaximum permissible limitsinspection foundationCertifiedi. Off-types I,II,III None Noneii. Plants affected with designated diseases- Red rot I,II,III None None- Smut I 0.02* 0.10*II 0.01* 0.10*III None None- GrassyII 0.05* 0.50*shootIII None None- Wilt III 0.01* 0.01*- LeafscaldII 0.01* 0.05*III None NoneTable 3: Field standard (insects) of seed cane cropFactors Stage of field Maximum permissible limitsinspection foundationCertified- Top borer II & III 5.0 5.0- Internode borer III 10.0None**10.0None**- Stalk borer III 20.0None**20.0None**- Plassey borer,Gurdaspur borer,Scale insect, mealybugIII 5.0None**5.0None**Preparation of settsThe germination of a bud is controlled by apical dominance which is exerted throughauxins. When apical dominance is removed by clipping off the top bud, the buds below tend togerminate. Because of this fact instead of planting an entire cane, it is cut in to 2-3 budded settsusually 30-45cm long.Sett treatmentTo prevent the seed setts from fungal diseases and to improve germination, the settsshould be dipped into 0.5 per cent solution of agallol (3%) or 0.25 per cent solution of aretan (6%)or tafasan (6%) for 10 minute before planting. Alternatively, setts may be treated with 0.1 per centsolution of carbendazim (Bavistin).- 98 -
(Seed Health Management for Better Productivity)If setts are brought from long distance, dip for 24 hours in a solution containing 500g limein 200 litre of water. This will invigorate the buds. If setts are infested with scale insects, mealybugs or white flies, treat with 265 ml of dimethoate (roger) per 100 litre water for five minutesbefore planting.Whenever facilities for hot water treatment are available the setts may be treated for 2hours at 50 0 C in hot water to check the chronic diseasees like grassy shoot, smut and red rot. Inlieu of this, moist hot air treatment (MHAT), evolved to control setts transmissible diseases beused. It also sterilizes canes against certain insects like scale, mealy bug etc. In MHAT unit seedcane be treated with above 95% humidity at 54 0 C for 4 hours. This system is highly useful toeliminate smut infected buds.Planting timeSugarcane crop raised exclusively for seed purpose is known as a ‘short crop’. The shortcrop is usually harvested at around 8-10 months. In the case of a short crop, entire stalk can beused for preparing setts, discarding only the bottom most buds.As the best age of harvest of a nursery crop is around 8-10 months, the planting dateshould be accordingly adjusted. For example, for autumn crop, the nursery planting should bedone from February to March. For spring crop, the nursery planting should be done in April.Site selectionSaline, alkaline and acidic soils are not suitable. Preference should be given to fertile soilswith good drainage, high organic carbon content and good water holding capacity at least to adepth of 50 cm. The effective soil depth for adequate root development should be at least 1 m.The soils should not be too shallow with hard pans as the roots will not penetrate deep; resulting inlodging and earthing will be difficult.The pH of soil should be 6.5 to 8.0. If the soils are saline; they need to be amended byapplying gypsum, sulphur and or organic matter. Water logged soils should be avoided for takingseed crop. The upland field is selected for raising the seed crop. The rain water traversing fromadjoining field is prevented to check spread of red rot.Field preparationSugarcane needs deep tillage. One deep ploughing followed by two cross harrowing orrotavator are required to prepare good seed bed.Levelling can be carried out by using a tractor operated leveller. A fairly level bed ensuresa uniform crop stand, proper distribution of irrigation and good crop growth. Sub-soiling is effectiveto break hard pan, ensuring better internal drainage.Seed rateHigher seed rate is preferred at reduced spacing. For 1.0 hectare land 50,000 three budedsetts or 75,000 two buded setts would be sufficient to raise a good seed crop, by weigh about 80-85 quintal seed will required for one hectare land.Other cultural operations- 99 -
Page 13 and 14:
(Seed Health Management for Better
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48: (Seed Health Management for Better
Page 97: (Seed Health Management for Better
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
potential. An improvement in qualit
Page 221 and 222:
9. Session Arrangement CommitteeDr.
Page 223 and 224:
9. Dr. Pradip Kumar BorahSr. Scient
Page 225 and 226:
TRAININGONANNEXURE-IIISEED HEALTH M
Page 227 and 228:
ANNEXURE-IVCENTRE OF ADVANCED STUDI
Page 229 and 230:
SundayApril 6MondayApril 7TuesdayAp
Page 231:
TuesdayApril 15WednesdayApril 16Thu
show all

Seed Health Management for Better Productivity - Govind Ballabh ...

Create successful ePaper yourself

Delete template?

Save as template?