Science
Why should preventive measures and biological control methods be preferred for protecting crops?
Answer
Preventive measures and biological control methods should be preferred for protecting crops because
- Biological control of weeds and insects occurs naturally in nature if we do not use chemicals like herbicide and insecticide.
- They do not cause any pollution and ecological disturbance as done by chemicals.
- This also helps to minimize bio-magnification.
- Insects and weeds slowly adapt or mutate to become stronger and immune to chemicals.
Related Questions
Compare the use of manure and fertilizers in maintaining soil fertility.
Which of the following conditions will give the most benefits? Why?
(a) Farmers use high-quality seeds, do not adopt irrigation or use fertilizers.
(b) Farmers use ordinary seeds, adopt irrigation and use fertilizer.
(c) Farmers use quality seeds, adopt irrigation, use fertilizer and use crop protection measures.
What factors may be responsible for losses of grains during storage?
Which method is commonly used for improving cattle breeds and why?