Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Importance of bee space was discovered by Langstroth.
The "Bee Space" is the gap between and around frames, which the bees will tolerate without trying to enlarge or block off thereby reducing the tendency for bees to stick the frames together or tear down the comb.
L. L. Langstroth discovered the principle of bee space in 1851 in the U.S.A. This space permits free passage for worker bees and is too small to build a comb by bees or too large for depositing bee glue i.e. propolis.

In collembolans, eggs are Isolecithal and holoblastic.
Springtails (Collembola) form the largest of the three lineages of modern hexapods that are no longer considered insects.
Collembolans are omnivorous, free-living organisms that prefer moist conditions. They do not directly engage in the decomposition of organic matter, but contribute to it indirectly through the fragmentation of organic matter and the control of soil microbial communities.
These eggs have sparse, equally spaced yolk and are thus isolecithal (“equal yolk”). In these species, cleavage is holoblastic (holos, “complete”), meaning that the cleavage furrow extends through the entire egg.

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.

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.

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.

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.

Intercalary veins and numerous cross veins are present in the case of Ephemeroptera.
Ephemeroptera is the Soft-bodied insect with short setaceous antennae and vestigial mouthparts derived from a biting type.
Wings membranous, held vertically upwards when at rest, the hind pair considerably reduced; ‘intercalary’ veins and numerous cross-veins usually present.
Cross-veins are transverse veins joining longitudinal veins. The costal cross-veins here are not homologs of those found in Odonata (or Ephemeroptera) which are flattened and triangular.

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.

In honey bee pollen basket is present in Hindleg.
The pollen basket or corbicula is part of the tibia on the hind legs of certain species of bees. They use the structure in harvesting pollen and carrying it to the nest or hive.
The pollen is transferred to the pollen comb on the hind legs and then combed, pressed, compacted, and transferred to the corbicula on the outside surface of the tibia of the hind legs.

Type of oesophagus, where basal bulb has a refractive valve is Rhabditoid type.
Esophagus rhabditoid with metacorpus slightly swollen, narrow isthmus surrounded by nerve ring, and large basal bulb with reduced valve. Esophago-intestinal valve is usually pronounced.