FOLIAR SPRAYING OF MICONUTRIENTS IN BANANA
Assistant Professor (Horticulture), ICAR-Krishi Vigyan Kendra, Tamil Nadu Agricultural University, Vriddhachalam
Banana (Musa spp.) is one of the earliest crops cultivated by man which still remains to be one of the world's most important fruit crop. At present, it is grown in more than 120 countries throughout tropical and subtropical regions of the world and staple food for more than 400 million people.
Table 1. Standard micronutrients recommendations for foliar spraying in Banana
Months after planting
5 mg/ l of water
2 mg/l of water
2 mg/l of water
1 mg/l of water
Care should be taken, while using copper sulphate and mix the mineral salts separately using wooden planks.
NRCB Banana Sakthi
Contains 4.8% iron, 5.3% zinc, 2.8% boron, 2.4% copper and 4.6% manganese
20 mg/l of water
Soak the mixture over night and use the supernatant for spraying, discarding the sediments.
IIHR /Arka Banana Special
micronutrients such as zinc, iron, boron, copper, manganese, molybdenum and secondary nutrients such as calcium, magnesium and sulphur
75 g/15l of water
Add juice of 2 lemon fruits+ 2 ml soap /shampoo packet and mix the contents and spray
The prefix "micro" is well-understood from its use in terms such as "microscope". The micronutrients are boron, copper, iron, manganese, molybdenum and zinc. These plant elements are need for plants in very small amounts, as they are important for plant development. They act as activators of many plant functions and major functions of micronutrients used in banana are listed here,
Role of the micronutrient in Banana
Necessary for sugar translocation and promotes fruit maturity
Catalyzes several plant processes like photosynthesis, development of reproductive stage, indirect role in chlorophyll production , increases sugar content , intensifies colour and improves flavour of the fruits on ripening
Promotes formation of chlorophyll pigments, acts as an oxygen carrier and reactions involving cell division and growth
Aids in regulating plant growth hormones and enzyme system, necessary for chlorophyll production, carbohydrate and starch formation.
Functions as a part of certain enzyme systems and aids in chlorophyll synthesis.
Required to form the enzyme "nitrate reductase" which reduces nitrates to ammonium and needed for converting inorganic phosphates to organic forms in plants.
The sulphate (salt) form of micronutrients such as Cu, Zn, Fe and Mn represents a water-soluble form that is available to plants. As micronutrients such as Cu, Fe, Mn and Zn are held within ring-type compounds, chelated micronutrients of Zn and Fe can also be used for foliar spraying in Banana, as they remain in plant-available form for longer period.
Micronutrient mixtures should be sprayed early in the morning or late evening for better results. It's advisable to use wetting agents or surfactant or Khadi soap solution at the rate of 1-2 ml/l of the solution along with the micronutrients for effective spraying. Make sure that the spray solution should cover the whole plant including leaves and pseudo stem as specified during its growth and development stage in Banana.
Submitted by Haripriya on Sat, 24/12/2011 - 13:21