Question
Write a short paragraph on the harmful effects of microorganisms.
✓
Answer
Harmful effects of micro-organisms:
$i.$ Micro$-$organisms cause diseases in animals. For example, in humans, bacteria cause diseases such as tuberculosis, cholera, typhoid, etc.
$ii.$ In cattle, the foot and mouth disease is caused by a virus.
$iii.$ Also, several microbes cause diseases in plants. For example, the productivity of wheat, orange, apple, etc. is reduced due to microbial diseases in plants.
$iv.$ Certain microbes, on entering into our body, produce toxic substances. This leads to food poisoning. Some micro$-$organisms such as fungus spoil our food. For example, bread when left unused under moist conditions gets spoilt by fungus, producing a white cotton$-$like growth on the bread.
$i.$ Micro$-$organisms cause diseases in animals. For example, in humans, bacteria cause diseases such as tuberculosis, cholera, typhoid, etc.
$ii.$ In cattle, the foot and mouth disease is caused by a virus.
$iii.$ Also, several microbes cause diseases in plants. For example, the productivity of wheat, orange, apple, etc. is reduced due to microbial diseases in plants.
$iv.$ Certain microbes, on entering into our body, produce toxic substances. This leads to food poisoning. Some micro$-$organisms such as fungus spoil our food. For example, bread when left unused under moist conditions gets spoilt by fungus, producing a white cotton$-$like growth on the bread.
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Given below is a conversation between two farmers Heera and Beera.
Heera: Brother Beera, your maize crops looks beautiful! They have grown pretty fast.
Beera: Yes, I have sprayed urea this time. What about you?
Heera: Well, I am still relying on good old cow dung. I am saving money for buying a tractor.
Beera: That’s good. Tractor saves a lot of time and labour.
Heera: Yes, it’s been very labour intensive for me and now these weeds have come up.
Beera: Try weedicides, they are very effective. Now answer the following questions.
$i.$ List the practices which are not environment friendly and why?
$ii.$ What is the advantage of modern agriculture implements over traditional ones?
$iii.$ Name one weedicide and the precaution farmers must take during its application.
→Heera: Brother Beera, your maize crops looks beautiful! They have grown pretty fast.
Beera: Yes, I have sprayed urea this time. What about you?
Heera: Well, I am still relying on good old cow dung. I am saving money for buying a tractor.
Beera: That’s good. Tractor saves a lot of time and labour.
Heera: Yes, it’s been very labour intensive for me and now these weeds have come up.
Beera: Try weedicides, they are very effective. Now answer the following questions.
$i.$ List the practices which are not environment friendly and why?
$ii.$ What is the advantage of modern agriculture implements over traditional ones?
$iii.$ Name one weedicide and the precaution farmers must take during its application.
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