A. Lady bird – iii. Aphids
Explanation: Lady bird is a red and black coloured beetle which feeds on small insects known as aphids. Ladybirds are natural bio controllers.
B. Mycorrhiza – iv. Glomus
Explanation: Glomus is a mycorrhizal fungus which forms a symbiotic relationship with the roots of the plants.
C. Biological control – ii. Trichoderma
Explanation: Trichoderma helps in controlling the plant diseases by various mechanisms such as enzyme secretion, competitive inhibition and antibiosis.
D. Biogas - i. Methano bacterium
Explanation: Methanogens are methane releasing bacteria.The main constituent of biogas is methane.
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