Tag: microbes and farming

Questions Related to microbes and farming

Microbe used for biocontrol of pest butterfly caterpillars is 

zoology sustainable agriculture microbes and farming biopesticide environmental protection

  1. Saccharomyces cerevisiae

  2. Bacillus thuringiensis

  3. Streptococcus sp.

  4. Trichoderma sp.

Show answer
Correct Option: B
Explanation:
Bacillus thuringiensis , a soil-dwelling bacterium, is the most widely applied species of bacteria used for biological control,  used against Lepidopteran, Coleopteran and Dipteran.
So, the correct answer is 'Bacillus thuringiensis'

Trichoderma harzianum has proved to be a useful microorganism for:

zoology sustainable agriculture microbes and farming biopesticide environmental protection

  1. gene transfer in higher plants

  2. biological control of soil-borne plant pathogens

  3. bioremediation of contaminated soils

  4. reclamation of wastelands.

Show answer
Correct Option: B
Explanation:
Teicoderma harzianum is a fungus that is also used as a fungicide. It is used for foliar application, and soil treatment for various disease causing fungal pathogens.
So, the correct option is 'biological control of soil-borne plant pathogen'

Which of the following statements regarding baculoviruses as biocontrol agents is/are correct ?

zoology sustainable agriculture microbes and farming biopesticide environmental protection

  1. The majority of baculovirus used as biocontrol agents are included in the genus - Nucleopolyhedrovirus

  2. Infection with baculoviruses occurs when susceptible hosts (e.g., some specific insects) eat virus particle present on foliage and dies.

  3. These are important in organic farming because of their specific action on harmful insects without causing any damage to beneficial insects as well as to the environment.

  4. All of these

Show answer
Correct Option: D
Explanation:

Baculoviruses are pathogens that attack insects and other arthropods. The majority of them used as a biological control agents are in the genus Nucleopolyhedrovirus.These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. Infection with baculoviruses occurs when susceptible hosts eat virus particle present on foliage and dies. These are important in organic farming because of their specific action on harmful insects without causing any damage to beneficial insects as well as to the environment.

So, the correct option is 'Option D' .