GLADIOLUS (Gladiolus spp) 
Iridaceae | 
         
       
        Varieties  
        Tropic Sea, White  Prosperity, Priscilla, Summer Sunshine, Pusa Swarnima, Jackson  Ville Gold, KKL.1, Archana, Basant Bahar, Indrani, Kalima, Kohra, Aarti, Arka  Kesar, Darshan, Dhiraj, Agnirekha, Archana, Bindiya, Shree Ganesh              
        
        Climate: Subtropical and temperate climatic conditions are suitable. The crop performs  well under a temperature range of 27 - 30°C. It requires full  exposure to sunlight and performs well with long day conditions of 12 to 14  hour photoperiod.  
           
          Soil: Well drained sandy loam soil rich in organic matter  with pH of 6 to 7.         
        Season                                                                                                                     
          This crop requires minimum 10 hours of sunlight to  over come blindness. So season should be adjusted or light substitution should  be given. 
        Propagation: 
        Commercial  propagation is through corms. Cold storage of corms at 3 to 7°C for 3 months or  treatment with Ethrel (1000ppm) or GA3 (100ppm) or Thiourea (500  ppm) is adopted for breaking corm dormancy.  
        Field preparation and planting: 
        Beds of size 6 x 2 m  are prepared and corms are planted at a depth of 5 cm adopting a spacing of 40  x 25 cm (88,888 plants/ha) or 25 x 25 cm (1,60,000 plants/ha).  
        Planting  season:  
        October for plains and  March-April for hills.         
        Planting system  
        Ridges and furrows system is adopted.                                                                 
        Irrigation: Irrigate at  7-10 day intervals in sandy soils and at less frequent intervals in heavy  soils. Irrigation should be withheld at least 4-6 weeks before lifting of  corms. 
           
          Nutrition: 120 kg N,  150 kg P2O5 and 150 kg K2O per hectare is  recommended, of which 60 kg N and entire dose of P2O5 and  K2O is applied as basal dose. The remaining N is given in two split  doses, 30 and 60 days after planting.       
Manuring                                                                                                                  
            Basal 
          N 60 kg/ha, P 150 kg/ha,  K150 kg/ha. 
        Top dressing  
          N alone is given @ 30 kg/ha during 4 leaf stage as  foliar spray and 30 kg/ha during bud stage as soil application. 
        Aftercultivation 
          After the corms have  sprouted well, watering should be done, if necessary. When the shoots are about  20 cm high they are covered by heaping the soil up to a height of 10 to 15 cm.  This enables the plants to grow erect despite high winds and rains and  suppresses weed growth. Earthing up the soil is a must in case of light soils.  In case where spikes grow longer or stems are not strong enough to bear the  lodging or mild stroke of wind, they are supported with about 1.5 meters strong  stakes. Strings instead of stakes may be used at the time of the appearance of  the spikes. Strings are stretched between the stakes along the row to provide  easy and adequate support. 
        Plant Protection 
          1. Before storage, corms are dipped in hot water at  40 - 45oC + fungicide (captan or thiram 2 g/lit) to  control Nematode and fungal disease. 
          2. Thrips   can be controlled by methyl demeton 25 EC 2 ml/lit. or dimethoate 30 EC  @ 2 ml/lit. 
          3. Semilooper and Helicoverpa can be controlled by methyl demoton . 
        Leaf spot  
          Spray Carbendazim or  Mancozeb 2 g/lit to control leaf spot.   
        Wilt  
          Drenching of Bavistin (0.2%) at fornight intervals  controls the wilt disease. 
        Blight disease 
          Blight disease can be controlled by spraying  Mancozeb @ 0.2 % 
        
          
            
               | 
              
                
                   
  | 
                    
                  
  | 
                 
                
                  Storage    rot  | 
                 
                | 
             
           
         
        Storage rot        
        
        Spraying of Benomyl  (0.2%) controls the storage rot        
        Season of  flowering and Harvesting  
  When first bud shows the colour of the variety  harvesting is started. 
Fluoride injury 
  Leaf scorch of gladioli is observed due to the presence of fluorine  compounds in the atmosphere which got accumulated on the tips of leaves. The  injury is associated with heavy application of super phosphate.  
Special  practices:                                                         
    Staking:Large flowered  varieties should be staked to avoid lodging.  
     
    Plant protection 
    Pests 
    Thrips:Spray  Dimethoate 30 EC @ 2ml/l or Fenitrothion 50 EC @ 2ml/l or Malathion 50 EC @  2ml/l  
    Semi looper and Helicoverpa: Methyl Demeton 25 EC or  Dimethoate 30 EC @ 2ml/l 
     
    Diseases 
    Leaf spot: Foliar application of Carbendazim @ 1g/l or Mancozeb @ 2g/l  
     
    Core or spongy rot: Foliar application of  Benomyl @ 1 kg/ha  
     
    Bacterial scab blight and spots: Dipping the corms in 1:100  Mercuric chloride solution for 12 hours before planting. 
Harvesting of spikes: 
  Gladiolus takes 110-120 days to produce spikes.  While harvesting, at least four basal leaves should be retained on the plant to  ensure proper development of corms and cormels. 
Post harvest treatment and Grading 
  Soak the stem in water to avoid wilting and lodging  of stem and flower.  Based on stem length  and number of florets, the spikes are grouped into A, B, C, D grades. 
Yield                                                                                                                          
  2.0 - 2.5 lakh flower stalks/ha/crop.  |