Agricultural Entomology - Study Mode
[#216] The boll worm which covers the opening once it enters into the boll is
Correct Answer
(B) Pink boll worm
Explanation
Solution: The bollworm which covers the opening once it enters into the boll is Pink boll worm. The pink bollworm is an insect known for being a pest in cotton farming. The adult is a small, thin, gray moth with fringed wings. The larva is a dull white caterpillar with eight pairs of legs with conspicuous pink banding along its dorsum. The larva reaches one half inch in length. Since cotton is used for both fiber and seed oil, the damage is twofold. Their disruption of the protective tissue around the boll is a portal of entry for other insects and fungi.
[#217] The main host tree of silkworm is
Correct Answer
(B) Mulberry
Explanation
Solution: The main host tree of silkworms is Mulberry. The domestic silk moth is an insect from the moth family Bombycidae. It is the closest relative of Bombyx mandarina, the wild silk moth. The silkworm is the larva or caterpillar of a silk moth. It is an economically important insect, being a primary producer of silk. A silkworm's preferred food is white mulberry leaves, though they may eat another mulberry.
[#218] Which is/are inhibitor of sclerotization
Correct Answer
(D) All of these
Explanation
Solution: The inhibitor of sclerotization is MON-0585, α-methyl DOPA, and Dihydroxy Phenyl alanine Decarboxylase (DDC). Sclerotization is the process of cuticular hardening which typically occurs within a few hours after each moult, due to the formation of cross-links between catecholamines or other phenolics and the protein and chitin fibrillar components of the cuticular matrix. α-methyl-DOPA (3,4-dihydroxyphenylalanine) and substituted phenols are suicide substrates for special enzymes here. Cyromazine was discovered by Hall and Foehse (1980) and has good activity on Diptera and Lepidoptera.
[#219] Rubber septa is used in
Correct Answer
(B) Pheromone trap
Explanation
Solution: Rubber septa are used in Pheromone trap. A pheromone trap is a type of insect trap that uses pheromones to lure insects. Pheromone traps are used both to count insect populations by sampling, and to trap pests such as clothes moths to destroy them. Rubber septa are most commonly used to seal medicinal vials containing either a liquid or freeze-dried solid (which is then liquefied in water or other substance). The medicine is drawn from the vial using a needle, then injected.
[#220] Lemon butterfly is
Correct Answer
(C) Papilio demoleus
Explanation
Solution: Lemon butterfly is Papilio demoleus. Papilio demoleus is a widespread swallowtail butterfly. The butterfly is also known as the lime butterfly, lemon butterfly, and chequered swallowtail. This butterfly is an avid mud-puddler and visitor of flowers. It basks with its wings held wide open on tufts of grass and herbs, and generally keeps within a metre of the ground, even on cloudy days. The female butterfly goes from plant to plant, laying a single egg at a time on top of a leaf, which it holds onto with its legs, and flies off as soon as the egg is laid. The egg is round, light yellowish, flattened at the base, smooth-surfaced, and about 1.5 mm in height. Fertile eggs develop a small red mark at the apex.