Chapter 12 Improvement of Food Resources Questions-06
Questions
1. Why should preventive measures and biological control methods be preferred for protecting crops?
Show Answer
Answer
Over-exposure to chemicals leads to environmental problems; hence, biological methods are preferred for protecting crops from pathogens, insects and rodents, along with increasing production. Since chemicals are harmful to plants and also to the animals which feed on them, bio-pesticides are used as a safe way of crop protection.
2. What factors may be responsible for losses of grains during storage?
Show Answer
Answer
Following are the factors responsible for loss of grains during storage:
(i) Abiotic factors like humidity and temperature.
(ii) Biotic factors like insects, rodents, birds, mites and bacteria.
