Download App

Improvement in Food Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceImprovement in Food Resources2 Marks
Question
How are diseases transmitted in crops?
✓

Answer

All viruses that spread within their host tissues (systemically) can be transmitted by grafting branches or buds from diseased plants on healthy plants. Most disease causing viruses are carried and transmitted naturally by insects and mites, which are called vectors of the virus.

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 2 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

An object of mass 12 kg is at a certain height above the ground. If the potential energy of the object is 480 J , find the height at which the object is with respect to the ground. Given, $g=10 m s ^{-2}$.
→

Name the two processes which contribute to soil formation.

→
Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.
→
What is meant by a solution? Give two examples of solutions.
→
What is the difference between a cation and an anion? Explain with examples.
→

What is natural system of classification?

→
What is meant by the symbol of an element? Explain with examples.
→
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.
→

What is taxonomy?

→
What is meant by man-made elements?
→