Download App

Improvement in Food Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceImprovement in Food Resources1 Mark
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 "One word answer." 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

When did Robert Hooke discover cell?

→

To which phylum do sponges belong?

→
A piece of paper can be jerked out from under a book quickly without moving the book. Why?
→

List two means of spreading of infectious disease.

→
Distinguish between micronutrients and macronutrients. Give suitable example.
→
All the gases form cathode rays and anode rays when electricity is passed through them:
What does the formation of anode rays tell us about the atoms?
→
Puccinia causes ________ disease in wheat.
→
Calculate the molecular mass of hydrogen bromide (HBr).
(Atomic masses: H = 1u; Br = 80u)
→
What is the acceleration of free fall?
→

Name the excretory organ of:

  1. Crab.
  2. Insect.
→