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Micronutrient deficiency results in low post harvest life, colour twisting of banana fingers

  • Mn toxicity – Old leaf margin with brown spots.


  • Boron toxicity – Old leaf twisted with rough lamina

Zinc deficiency occurs from the 3rd leaf stage onwards, Boron & Copper deficiency occurs from the 4th to 5th month onwards Iron deficiency occurs can occur from any stage especially when the free calcium carbonate is high and aeration is poor especially in winter months. Zn- Narrow small leaves, Fe- Yellowish young leaf B- Mal farmed leaves, Cu- Blush green leaf

Micronutrients can be mixed with all pesticides excepting Bordeau mixture.

Zinc is needed in the early stages and boron is needed throughout the growth.

Micronutrient disorders are corrected by both soil application (at time of planting) and foliar spray after (4th month of planting)

Grand Nain is most sensitive to Micronutrient disorders among the three. Micronutrients affecting Banana- Southern Karnataka (Red soil) Boron and Zinc - Northern Karnataka (Black soil) Boron, Iron and Zinc

Post-harvest use of pesticides should be avoided as far as possible. Care should be taken to use less persistent pesticides only at the recommended concentration. Use of persistent pesticides like Benomyl, Carbendazim and Deltamethrin should be avoided.

The vast amount of data on effect of pesticides on beneficial soil organisms indicate that pesticides can reduce, enhance or have no effect on the populations of various soil organisms. In most of the cases, such effects are temporary and depend on the amount of pesticide added to the soil. Maximum damage is caused by soil fumigants and the soil activity that is most likely to be affected is the dehydrogenase activity.

The methods that be commonly followed are:

  • Washing with water.


  • Washing with dilute solution of common salt.


  • Washing with detergent solution.


  • Peeling up off fruit skin.


  • Boiling.


Only recommended pesticides should be used to get effective control of pests and diseases. Pesticides which are not recommended for use do not give any pest control but leave toxic residues that are harmful to humans and animals.

Waiting period of a pesticide refers to the period required between the last spray of the pesticide in a crop and the first harvest of the crop, such that the residues of the pesticides on the crop do not exceed maximum permissible levels or permissible levels fixed by FAO / WHO.

The pesticides that can be considered comparatively safer to be sprayed on horticultural crops before harvest are DDVP, Captan, Indoxacarb, Cypermethrin etc.,

Pesticides are toxic to humans as well as animals at low concentrations. Thus, their residues (at trace levels) in plant, soil or water may result in adverse health effects on human beings as well as animals. Due to this, pesticides are considered harmful to humans and animals.

  • Pesticides should be sprayed in early morning or late evening hours to avoid volatilization losses.


  • Protective gear such as goggles, boots, overalls and face masks should be worn by a the person who is spraying.


  • Sprayer especially the nozzles should be of good quality to ensure uniform spraying.


  • Only recommended doses and spray volumes of pesticides should be sprayed.