Agricultural Entomology - Study Mode

[#501] The following order closely related to Glossata is
Correct Answer

(C) Trichoptera

Explanation

Solution: The following order closely related to Glossata is Trichoptera. Trichoptera, or caddisflies, are an order of aquatic insects occurring around the world in rivers, streams, and lakes. About 15,000 species are known. The aquatic larvae use silk to construct cases in which they reside or to spin silken nets to capture food suspended in the water column. Larvae of members of the family Glossosomatidae in the suborder Spicipalpia create dome-shaped enclosures of silk which enables them to graze on the periphyton, the biological film that grows on stones and other objects, while carrying their enclosure around like turtles.

[#502] Although body wall exhibits bilateral symmetry in nematode, yet stylet knobs exhibit
Correct Answer

(A) Tri-radiate symmertry

Explanation

Solution: Although body wall exhibits bilateral symmetry in nematode, yet stylet knobs exhibit Tri-radiate symmertry. Tri-radiate means having three rays or radiating branches. The tri-radiate condition would be explained if the dorsal hydrocoele formed only a single podium and ambulacrum.

[#503] Who proposed the concept and terminologies of 'Bioeconomics'?
Correct Answer

(A) V. M. Stern

Explanation

Solution: V. M. Stern proposed the concept and terminologies of 'Bioeconomics'. Bioeconomics is a progressive branch of social science that seeks to integrate the disciplines of economics and biology for the sole purpose of creating theories that do a better job of explaining economic events using a biological basis and vice versa. Vernon Mark Stern (28 th March 1923 - 16 th March 2006) was an American professor of entomology at the University of California, Riverside considered one of the founding figures of integrated pest management. He also developed the concept of economic injury level and other economic thresholds about which he wrote an influential review paper in 1973.

[#504] Scientifically lac insect is known as
Correct Answer

(A) Laccifera lacca

Explanation

Solution: Scientifically lac insect is known as Laccifera lacca. The Indian lac (Laccifer lacca), a South Asian scale insect, secretes a resin material onto trees that can be used as shellac, an important ingredient in various inks, paints, sealants and varnishes. The life cycle of this scale insect proceeds with the first instar of the larval stages, which are known as "crawlers". Larvae in this stage crawl along the branches of their host plants and feed on the phloem.

[#505] Scientific name of sorghum aphid is
Correct Answer

(C) Both A and B

Explanation

Solution: The scientific name of sorghum aphid is Melanaphis sacchari and Hysteraneura setariae. Melanaphis sacchari and Hysteroneura setariae are aphids in the superfamily Aphidoidea in the order Hemiptera. It is a true bug and sucks sap from plants. It is mostly found in Saccharum and Sorghum species. These aphids usually are found in the whorls and on the tops of newly emerged leaves of sorghum plants.