What are biopesticides mainly made from?
A
Synthetic chemicals B
Natural materials like microbes and plants C
Heavy metals D
Plastic-based polymers
Analysis & Theory
Biopesticides are derived from natural materials such as bacteria, fungi, or plant extracts.
Which of the following is a microbial biopesticide?
A
Neem extract B
Pyrethrum C
Bacillus thuringiensis (Bt) D
Copper sulfate
Analysis & Theory
*Bacillus thuringiensis* is a bacterium used to control insect larvae.
What is the main advantage of using biopesticides?
A
They are fast-acting poisons B
They are eco-friendly and target specific pests C
They kill all insects instantly D
They leave strong chemical residues
Analysis & Theory
Biopesticides are safer for the environment and target specific pests, reducing harm to beneficial organisms.
Which plant is known for producing azadirachtin, a powerful insect repellant?
A
Pyrethrum B
Neem C
Eucalyptus D
Tobacco
Analysis & Theory
Neem contains azadirachtin, which acts as an insect growth regulator.
Which of the following is a limitation of biopesticides?
A
They are highly toxic B
They are banned globally C
They act slowly and may have a short shelf life D
They increase pesticide resistance quickly
Analysis & Theory
Some biopesticides act slower and degrade faster under sunlight or heat.