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KMS Kenya  (01-03-2013)  Patrick Maina

  8134 

 
 
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Maize crop affected by masses of sooty substance

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Maize crop affected by masses of sooty substance

This disease is called head smut and is caused by Aspergilus sp and Fusarium sp.These fungi are known to cause the black sooty powdery substance on maize plants that is observed in these crop

 

03 Name of the expert:

Miriam Judith Otipa

04 Email address of expert:

Otipamj@gmail.com

06 Profession of Expert:

Plant Pathologist

07 Organisation of expert:

KARI

08 Practical experience:

19 years in plant disease diagnosis and prescription of recommendation to farmers, extension agents and other stakeholders

09 Diagnosis:

This disease is called head smut and is caused by Aspergilus sp and Fusarium sp.These fungi are known to cause the black sooty powdery substance on maize plants that is observed in these crop.

10 Practical Instruction:

Control
- Always plant certified/disease-free seeds/planting materials to avoid introduction of pathogens (disease-causing organisms) on your farm.
- Uproot and destroy by burning all severely infected maize cobs. This will minimize the spread of inoculum on the field. These should NEVER be feed on livestock.
- Practice crop rotation with non-cereal crops like cabbage, kale, spinach. A one to two year rotation with non-cereal crops is sufficient
- Constantly disinfect farm implements (e.g. hoes, ploughs, gumboots, shoes, pegs and sprinkler stands) before use by using jik. A solution (dilution of 500 ml of jik in 10 litres of water) can be used for washing the implements. This will prevent introduction of the fungus from potentially affected fields.
- Regularly add manure and top dress the maize during the early stages of growth using CAN to enhance the vigour of the crop.

11 Conditions for success:

Strictly follow the above instructions. Always regularly add manure to the maize to improve the vigour of the plant

12 Conditions for failure:

Increased rainfall and moderate temperatures will highly increase disease incidences on the farm as this pathogen thrives very well in warm and humid conditions. Lack of removal of diseased maize cobs from the farm and destruction by burning will increase the pathogen inoculum on the farm.

13 Expected short term effect:

The remaining plants should be healthy

14 Expected mid-term effect:

If the above recommendations are not followed this pathogens will destroy the entire crop within a few months

15 Expected long-term effect:

If the diseased maize plants are left on the same land for along time these pathogens will contaminate the soil and it might be difficult to control them in future thus rendering the farm unproductive. Therefore these pathogen must be controlled immediately

16 How common is the problem:

very common

17 Importance:

one of the main problems

18 Since when is it known:

10 to 20 years

19 Tendency:

growing

20 Geographic extent:

in large parts of the country

21 IDs of similar cases in RUN:

6622

01 ID of the request in RUN:

8130

this is the answer to id: 8130
 
Classification
 
Africa Kenya Journal:KMS Kenya
 
Section:
  • Protection and Health
  •   Products:
  • Maize
  •  
     
    Additions to the article
     
     
    Author┤s email:
     Email des Autors Pmaina@kari.org
     
    Related links..
      Head Smut of Corn     Head smut-maize     Maize diseases-Head smut     Reports on Plant Diseases-Head smut  
      Epidemiology and maize crop resistance to head smut disease with reference to small-scale maize-dairy farmers in Central Kenya.