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Different Diseases of Field Crops

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Rural Technology

Intext Questions

Match the followings: A B i) Grassy shoot of sugarcane a) 10% salt soln. ii) Green Ear b) lesion on leaves are angular and water soaked iii) Ergot c) Seed treatment with Bavistin iv) Black arm d) Hot water treatment.

What you have learnt

Diseases cause huge loss of crop plants. There are endemic, epidemic and sporadic diseases. Diseases spread through soil, air, seed and water. Diseases are also spread by insects. Evidence of disease shown by plant is called symptoms. Mildew, rusts, smuts, blisters, scab, blotch are the different symptoms shown by the crop plants. For control and prevention of plant diseases various methods are followed. Prevention is always better but timely control helps in reducing crop plant losses.

Answer to intext questions

5.1 1. Match the following a. Pathogen is seen on the surface of the host b. Crust like lesion on diseased organ c. Prevalent in a particular locality d. Irregular occurrence in a locality e. Sooty or Charcoal like powder 5.2 1 Match the following a. Dark brown cankers b. Leaves get discoloured c. White powdery spots d. Reddish brown pustules e. Chlorosis 5.3 1 Match the following a. Banana b. Citrus c. Sapota d. Grape e. Mango 5.4 Match following a) Hot water treatment b) Seed treatment with Bavistin c) 10% salt soln. d) Lesions on leaves are angular and water soaked

Suggested activities

a. Prepare an album of various diseases occurring on vegetable crops. b. Prepare an album of various diseases occurring on fruit crops. C. Prepare an album of various diseases occurring on field crops


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