Which of the following is not a beneficial insect?
(a) Helicoverpa armigera
(b) Bombyx mori
(c) Laccifer lacca
(d) Apis mellifera
Answer: a
Helicoverpa armigera, also known as the cotton bollworm, is considered a major pest insect that can cause significant damage to crops like cotton, corn, and tomatoes.
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Why the other options are beneficial:
(b) Bombyx mori:
This is the silkworm, which is raised for its silk production, making it economically beneficial.
(c) Laccifer lacca:
This insect produces lac, a resinous substance used in various industries, including shellac production.
(d) Apis mellifera:
This is the honeybee, known for producing honey and playing a crucial role in pollination.