Manganese (Mn) deficiency symptoms

Manganese (Mn) deficiency symptoms. Plants exhibit “comb-tooth” leaf chlorosis and the presence of fungus- Deightoniella torulosa in the chlorotic areas. The chlorosis starts from the leaf margins and spreads along the veins towards the midrib with interveinal areas remaining green, hence the comb-tooth appearance. Leaves desiccate prematurely causing poor fruit development. Normal size bunch is produced by the plant but the fruits are covered with black spots. Control Measures: a.      Spray Manganese sulphate @ 2 g/l of water ( Neutralized with lime)once a week for two weeks. Photos courtasy: TNAU, Coimbatore, Tamilnadu, Indi...

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Posted in: 35. Manganese (Mn) deficiency symptoms

Calcium (Ca) deficiency symptoms

Calcium (Ca) deficiency symptoms: Young leaves show interveinal chlorosis near the margins and towards the tip.  When these chlorotic patches die they create a serrated necrosis along the leaf margin.  A temporary shortage of calcium causes the “spike leaf” symptoms in the field in which the lamina of new leaves is deformed or almost absent with thickened lateral veins near the mid-rib and deficient root system which is susceptible to rot.  Fruit quality is inferior and the peel splits when the fruit is ripe. (Boron and Calcium deficiency symptoms tend to overlap. So see Boron deficiency pictures also). Picture 1: Ca deficiency-Early foliar symptom -  Yellow stripes parallel to leaf midrib.           Picture...

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Posted in: 30. Calcium (Ca) deficiency symptoms

CONTIGENCY PLANS

(This useful article is published by NRCB, Trichy for farmers ready reference). CONTIGENCY PLANS .  .  .  .  . Overcoming soil sodicity problem in banana Due to salinity and sodicity of soil, the banana plants may suffer from marginal chlorosis and necrosis of older leaves, lesser proliferation of roots and an yield reduction by about 30%. This problem may be rectified by applying 0.5 kg of gypsum + 15 kg of FYM along with 120 % recommended potassium per plant. The water drainage facility of the land should be improved to leach down the excess sodium and salts. Overcoming flood damage in banana Open deep trenches between the plant rows for improving the drainage condition of the land. Give foliar spray of 2% potassium sulphate. After 15 days, give another...

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Posted in: 19. Contigency plans

CALENDAR OF AGRICULTURAL OPERATIONS FOR BANANA:

(This useful article is published by NRCB, Trichy for farmers ready reference). CALENDAR OF AGRICULTURAL OPERATIONS FOR BANANA: Preparation of land: Plough the land thoroughly at least for 3-4 times and add about 10 tonnes of well rotten FYM or Compost during last plough and mix it well or add 10-15 kg FYM/ Compost per pit  of 60x60x60 cm dimension. Selection of Suckers: Select ‘Sword Suckers’ with broad corm with narrow sword like leaves, from viral, fungal and bacterial disease free mother plants.  The suckers should be 3-5 months old, uniform in size, weighing 1-1.5 kg for Nendran, Rasthali, Ney Poovan and Poovan banana varieties. For long duration varieties like Karpuravalli and Red Banana, slightly big suckers weighing 1.5-2.0 kg should be used. For planting...

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Posted in: 17. Calendar of cultivation