Effect of excessive dose of MKP and Urea when used them for banana bunch development

Dear reader,
 You are kindly requested to visit the link: 

 "Banana Bunch Care and procedures to maximize the bunch size", 

which is a must read article that covers all aspects of bunch care and proven methods to increase the bunch size, before commence reading the following article. Thank you.

A case of excessive dose of MKP and Urea when used them for banana bunch development and its detrimental effect:

The two pictures shown here under were taken at a field where the farmer was asked to spray 0.5% MKP (Mono potassium phophate) + 1% Urea on bunches for bunch development. This wrong selection and overdose of chemicals has resulted in total spoilage of the bunch due to abnormal elongation of fingers (11 to 12 inches) and very thin fingers with no scope for further development. (See the lesions in the peduncle). 

To avoid damage to the developing Banana bunch learn to use fertilizers judiciously.

At the banana bunch development stage the following fertilizers are  normally recommended to enhance the size of fruits / bunch: 

Option 1: Application of 2% (20gm / 1litre) Potassium sulphate (0:0:50) as foliar spray on bunches, two times with 15 days interval.

(OR)

Option 2: Application of 1% (10gm / 1litre) Potassium nitrate (13:0:45) as foliar spray on bunches, two times with 15 days interval.

(OR)

Option 3 (Considered as best since it addresses all nutritional deficiencies): Application of 0.5% (5gm / 1litre) Potassium nitrate (13:0:45) + 0.5% (5gm / 1litre) of foliar grade Micro nutrient mixture as foliar spray on bunches as first spray followed by a second application of 2% (20gm / 1litre) of Potassium sulphate (0:0:50) + Biozyme 2ml / 1litre after 15 days. Repeat the second one again as III application after 15 days interval.

Important Note 1: In all the above applications you can also add 0.2% Bavistin (Fungicide) for prophylactic control of fungal infections. Use wetting agents also. 

Important Note 2: Nowadays farmers are going for a minimum of four applications within a period of 60 days (4 sprays with 15 days interval between each spray) and are getting very good results. 

Precautions: 

• Care should be taken to spray the above fertilizers only after all the hands are fully opened and after sufficient extension of male flower bud in the rachis. 
• Do not apply any fertilizers or pesticides 15 days before harvest since there is a possibility of the unabsorbed chemical residues entering human food chain.
• Application of excess dosage of fertilizers, Enzymatic and synthetic Growth promoters and plant protection chemicals on bunches are to be strictly avoided.

Good quality bunches that were sprayed with SOP, Multi K, foliar grade M.N and Biozyme solution. Please visit the following links also:  "Banana Bunch Care and procedures to maximize the bunch size",  'Banana bunch care as recommended by ICAR'.

Regards,  A.Vishnu Sankar

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Posted in: 26 a. Banana Bunch care - Effect of excessive use of chemicals

Effect of excessive dose of Hexaconazole fungicide (Contaf) on Banana

Effect of excessive dose of Hexaconazole fungicide (Contaf) on Banana:

Hexaconazole is a systemic, broad-spectrum fungicide mainly used on banana. It is widely used to control rhizome rot, corm dry rot and root rot in banana and the application rate is 1ml to 1.5ml per plant for rootzone drenching. Application of the above fungicide @1ml in 200 ml of water for drenching around the plant is enough for a month old plant, 1.25 ml in 500 ml for 2 months old and 1.5 ml in1litre for plants above 3 months.

Here in the two pictures published here below, the injury caused to the the outer layers of the pseudo stem and the leaves is because of the root-zone application of Hexaconazole @ 6ml / 1litre for 3 month old plants by the farmer by mistake. Banana plants collapsed fully in places where he applied 2 litre of the above solution.

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Posted in: Injury due to Fungicide - Effect of wrong selection and excessive use of fungicide

Injury due to Gramoxone herbicide spray on Banana

Injury due to Gramoxone herbicide spray on Banana: 

The pictures published down here under show injury to banana plants due to spraying of Gramoxone herbicide without spray hoods. During herbicide application, whether it is Gramoxone or Glyphosate, the following precautions should be taken:

1. Use only recommended dose of herbicide. 
2. Use spray nozzles that are specially designed for weedicide / herbicide application. 
3. Apply them under low pressure. 
4. Do not speed. A slow move, slower than the normal leisurely walk is the ideal speed for herbicide application. 
5. Use spray hoods mounted on spray nozzles to prevent the herbicide product to escape and cause crop injury. 
6. During spraying the spray hood should be as close to the ground as possible make sure the hood is on the ground until it has fully moved past the plant. Raise the hood only after turning off the spray.
   Regards, 
   A.Vishnu Sankar

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Posted in: 42. Herbicide Injury - Effect of wrong selection and excessive use of Herbicide