The destruction of $50\%$ of maize plants in the $USA$ in $1970$ was due to an infection by:

  • A
    Hemileia vastatrix
  • B
    Helminthosporium maydis
  • C
    Claviceps purpurea
  • D
    Ustilago maydis

Explore More

Similar Questions

Give scientific reasons: $Bt$ protein cannot kill $Bacillus$.

Why is $Bt$ toxin not toxic to human beings?

Transgenic rice (Golden rice) has been developed for the increased production of .......

$RNA$ interference is used for which of the following purposes in the field of biotechnology?

Production of pest-resistant plants could

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo