Biofertilizers and Biopesticides
Covers biofertilizers (nitrogen-fixing bacteria, phosphate-solubilizing bacteria, mycorrhiza, blue-green algae) and biopesticides (bioinsecticides, bioherbicides) used for sustainable agriculture and crop protection
Questions
What are biofertilisers?
- Manure
- Organisms used to improve fertility of soil
- Organic chemicals
- Organisms which naturally increases fertility of soil
Which organism is used in vermicompost method of preparation of organic manure?
- Rhizobium
- Earthworm
- Ant
- Azolla
Which nutrient is given to the plants by symbiotic bacteria?
- Nitrogen
- Oxygen
- Phosphorous
- Carbon
With which organism does Nostoc punctiformae form symbiotic association?
- Anabana
- Azospirrilum
- Anthoceros
- Azolla pinnata
Azotobacter is
- phosphate solubilising bacteria
- symbiotic bacteria
- non-symbiotic bacteria
- gram positive bacteria
What is VAM?
- Ectomycorrhiza fungus
- Endomycorrrhiza fungus
- Ectoparasite
- Endoparasite
What is Bacillus thuringiensis used as?
- Biofertiliser
- Biopesticide
- Weedicide
- Fungicide
Bacteria having siderophores act as
- biofertilisers
- iron-chelation agents
- Both 1 and 2
- biopesticide
What is cochineal insect used as?
- Biofertiliser
- Bioinsecticide
- Bioherbicide
- Biopesticide
Use of praying mantis to kill aphids is an example of
- bioinsecticide
- biopesticide
- bioweedicide
- symbiotic association
What function does Pseudomonas straita perform?
- It solubilises phosphorous.
- It kills weeds.
- It provides nitrogen to plants.
- It is used as bioinsecticide.
Which of the following is not a blue-green algae?
- Anabena
- Nostoc
- Azolla
- Microcystis
Azadiractin is obtained from
- oak
- tobacco
- neem
- dhatura