WorksheetsEnvMicro_Quiz11
Total questions: 10
Worksheet time: 5mins
Which of the following on biological control (BC) is correctly matched:
Classical BC-manipulate environment
Conservation BC-introduce native enemies
Augmentation BC-by inoculation
Inundation BC-release host plants
Biological control is favoured because:
Is enviromentally-friendy
Is the only solution
Is effective for all pests
All
The BCAs for the control of mosquito larvae must:
Spread slowly in water
Die after a few weeks
Have unpredictable control
Produce motile spores
The BCAs for application as biopesticide must:
Be safe
Amenable to mass culture
Withstand milling and powderization
All
Which statement on Bacillus thuringiensis is false?
Spore-forming
Produces cry protein
Toxins kills by host invasion
Effective against most Lepidoptera
NPV viruses as BCAs:
Are host specific
Encased in inclusion bodies
Has good shelf-life
All
Challenges in using fungi as BCAs are all except:
No spore formation on soil substrate
Complex lifecycle
Loses pathogenicity
Not amenable to scale-up
Which of the following can be develop as a biofertilizer?
Mycorrhiza
Endophytes
PGPR
All
Microbes as biofertilizers help in:
Improved tolerance to stress
Nutrient uptake
Faster plant establishment
All
Endophytes as biofertilizers:
Improve tolerance to stress
Form root extensions for P uptake
Colonizes the rhizosphere
All
