NCERT Solutions for Class 9 Science Chapter 15
Important NCERT Questions
Improvements in Food Resources
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-209
Questions No-2
What factors may be responsible for losses of grains during storage?
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During the storage of grains, various biotic factors such as insects, rodents, mites, fungi, bacteria, etc. and various abiotic factors such as inappropriate moisture, temperature, lack of sunlight, etc. are responsible for losses of grains. These factors act on stored grains and result in degradation, poor germinability, discolouration, etc.
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The factors responsible for losses of grains during storage are:
There are two main factors responsible for lose during storage. A. Biotic factors include:
1. Insects, e.g., grubs of pulse beetle; grubs and adults of rice weevil; wheat weevil; caterpillar of grain and flour moth; larvae and adult of rust red flour beetle; Iarvae of rice moth and grubs and adults of lesser grain borer.
2 Rodents, e.g., striped squirrel, house rat, house mouse, lesser bandicoot rat, etc.
3. Birds, e.g., parakeet, sparrow, bulbul, blue rock pigeon, crow, etc.
4. Mites; 5. Fungi; and 6. Bacteria”
B. Abiotic factors. They include moisture, temperature and other non-living environmental factors.