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NEST2021BiologyOrganisms and Populations

Coffee leaf rust is caused by the fungus Hemileia vastatrix. Lecanicillium lecanii, a saprophytic fungus is often found on the coffee leaves because it is able to colonize and consume H . vastatrix. In addition, L. lecanii infection routinely spreads among Coccus viridis, another pest of coffee. C. viridis are often found in large numbers near the nest of the ants (Azteca instabilis) which offers protection to C. vir

Options

  1. AAn increase in ant population has a positive effect on coffee plantation.
  2. BA curative eradication of H . vastatrix will decrease the number of C . viridis.
  3. CInfection rate of L . lecanii in C . viridis is low because of their scanty numbers, except near the nest of a
  4. DAn increase in A . instabilis numbers has an indirect negative effect on H . vastatrix.

Correct answer

D. An increase in A . instabilis numbers has an indirect negative effect on H . vastatrix.

Step-by-step solution

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