Agricultural Entomology - Study Mode
[#461] Nicotine cause failure of nervous system and commercially available as
Correct Answer
(A) Nicotine sulphate
Explanation
Solution: Nicotine cause failure of nervous system and commercially available as Nicotine sulphate. Nicotine is a naturally produced alkaloid in the nightshade family of plants and is widely used recreationally as a stimulant and anxiolytic. Nicotine acts as a receptor agonist at most nicotinic acetylcholine receptors, except at two nicotinic receptor subunits (nAChRα9 and nAChRα10) where it acts as a receptor antagonist. By binding to nicotinic acetylcholine receptors in the brain, nicotine elicits its psychoactive effects and increases the levels of several neurotransmitters in various brain structures.
[#462] Non-functional hermaphrodism is found in
Correct Answer
(B) Mutant drosophila
Explanation
Solution: Non-functional hermaphrodism is found in Mutant drosophila. The hermaphrodite locus has both maternal and zygotic functions required for normal female development in Drosophila. In mutant drosophila, hermaphrodism is found, which is an organism that has both kinds of reproductive organs and can produce both gametes associated with the male and female sexes. But it is not in functional state.
[#463] Electrodyne sprayer is used for spraying of which insecticide?
Correct Answer
(B) Cypermethrin
Explanation
Solution: Electrodyne sprayer is used for spraying Cypermethrin insecticide. Electrodyn sprayer nozzle relative to the row, to define the optimum method of use. It should be held downwind of the operator. It is used for the control of insect pests on cotton. The overall distribution of fully charged spray from the ‘Electrodyn’ sprayer was, in general, similar to that of discharged spray applied by the ‘Electrodyn’, with more than 80% deposited on ‘top’ leaves.
[#464] Robinson trap is used for
Correct Answer
(B) Nocturnal insect
Explanation
Solution: Robinson trap is used for Nocturnal insects. Robinson trap is Large, round, plastic container. traps are used to monitor or directly reduce populations of insects or other arthropods, by trapping individuals and killing them. They typically use food, visual lures, chemical attractants and pheromones as bait and are installed so that they do not injure other animals or humans or result in residues in foods or feeds. Light traps are widely used to survey nocturnal moths. It Catches large numbers of moths that tend not to escape.
[#465] Family of sapota seed borer, Trimalitis margaritas is
Correct Answer
(B) Tortricidae
Explanation
Solution: The family of sapota seed borer, Trimalitis margaritas is Tortricidae. The Tortricidae are a family of moths, commonly known as tortrix moths or leafroller moths. Tortricid moths are generally small, with a wingspan of 3 cm or less. The sapodilla seed borer, (Trymalitis margarias) is a species of moth of the family Tortricidae. It is found in Sri Lanka. This species has a wingspan of 17 - 20 mm. It is a highly invasive species that attacks sapodilla species very often. The attack symptoms are only visible after days of infestation of larvae. Larvae emerge from the seeds. Damaged fruits are frequented by small black ants.