Download App

Improvement In Food Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceImprovement In Food Resources3 Marks
Question
Describe the biological method of weed control.
✓

Answer

Biological method of weed control involves the deliberate use of insects or some other organisms which consume and specifically destroy the weed plants.
Example: Opuntia can be controlled by using cochineal insects in Maharashtra.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Que-Ans (Each of 3 Mark )" from Improvement In Food Resources→Improvement In Food Resources — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

How are complex permanent tissue different from simple permanent tissue?
→
Explain why, when a person stands on a cushion, the depression is much more than when he lies down on it.
→
A body travels a distance of 3km towards East, then 4km towards North and finally 9km towards East.
  1. What is the total distance travelled?
  2. What is the resultant displacement?
→
Write down differences between dicots and monocots.
→
If the work done by a force in moving an object through a distance of $20\ cm$ is $24.2J$, what is the magnitude of the force?
→
List main sources of water pollution.
→
How is bacterial cell different from onion pell?
→
Calculate the density of an object of volume $3 \mathrm{~m}^3$ and mass $9 \ kg$ . State wheater this object will float or sink in water.
Give reason for your answer.
→
If a balloon filled with air and its mouth untied, is released with its mouth in the downward direction, it moves upwards. Why?
→
Draw a flow diagram of the processes involved in obtaining gases like nitrogen, oxygen and argon from air.
→