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NCERT
QUESTION: WHAT ARE WEEDS? HOW TO CONTROL THEM?
SUBJECT: SCIENCE
CLASS:8
WELCOME TO INTELLIFY INTERACTIVE VIDEO SERIES
What are the characters which make weeds different from other healthy plants?
These characteristics help you to remove weeds in time because weeds grow at a very fast pace.
a) Abundant seed production
b) rapid population establishment
c) seed dormancy
d) adaptation for spread
e) presence of vegetative reproductive structures
f) serve as hosts for crop diseases or provide shelter for insects to
overwinter.
h) Limit the choice of crop rotation sequences and cultural
practices.
• Chemical methods — In this method different types of chemicals (herbicides) are used which are harmful for the weed but not for the crop.
These chemicals slow the rate of germination of weeds.
• Cultural methods — this is the traditional method used by farmers for many years.
Farmers in this method try to keep their field in such a condition that the weeds are less likely to grow in the field.
Examples of cultural weed control would be crop rotation, avoiding overgrazing of pastures or range land, using well-adapted competitive forage species, and maintaining good soil fertility.
So next time, whenever you see any weed’s species growing in your field just opt one of the above methods to protect your crops.