Agricultural Entomology - Study Mode

[#576] Accessory gland of mesodermal origin in the male reproductive system of cockroach are
Correct Answer

(B) Mesadenia

Explanation

Solution: Accessory gland of mesodermal origin in the male reproductive system of cockroach are Mesadenia. The male accessory glands of insects are abdominal gland systems associated with the reproductive system and are commonly called mesadenia if they arise from the vasa deferentia, or ectadenia if they are associated with the ejaculatory sac. These glands are both mesodermal and ectodermal in many insect orders. The male accessory glands comprise one pair of mesodermal glands (mesadenia) and six pairs of ectodermal glands (ectadenia). The mesadenia consist of a mono-layered elongated columnar epithelium, the cells of which are highly microvillated and extrude secretory granules using merocrine mechanisms.

[#577] Which of the following pairs is not correct in the term of Insect and Type of mouth parts?
Correct Answer

(D) House fly ⇔ Sponging mouth part

Explanation

Solution: A. Bee ⇔ Chewing type The mouthparts of the honey bee belong to the chewing–lapping type, comprising the glossa, galeae and vestigial labial palp, and they aid the bee in chewing pollen and lapping nectar. B. Bug ⇔ Piercing and sucking Several insect orders (or more precisely families within them) have mouthparts that pierce food items to enable the sucking of internal fluids. C. Butterfly ⇔ Siphoning mouth part This section deals only with insects that feed by sucking fluids, as a rule without piercing their food first, and without sponging or licking. Typical examples are adult moths and butterflies. D. House fly ⇔ Sponging mouth part is not correctly matched. The housefly is a typical sponging insect. The labellum's surface is covered by minute food channels, formed by the interlocking elongate hypopharynx and epipharynx, forming a proboscis used to channel liquid food to the oesophagus.

[#578] Destructive Insects Pest Act (DIPA) was passed on
Correct Answer

(D) 1914

Explanation

Solution: Destructive Insects Pest Act (DIPA) was passed in 1914. Destructive Insects and Pests Act, of 1914 is an act to prevent the introduction into India and the transport from one State to another of any insect, fungus, or another pest, which is or may be destructive to crops. This Act grants the Central Government may the power to levy and collect such fees at such rates and in such manner as may be specified in the 1914 Act for making an application for a permit to import, or for making inspection, fumigation, disinfection, disinfestations or supervision of, any article.

[#579] Agrotis spp. belong to the family
Correct Answer

(B) Noctuidae

Explanation

Solution: Agrotis spp. belong to the family Noctuidae. Cutworms (Agrotis spp.) are cosmopolitan and polyphagous pests distributed throughout the world, which belong to the family Noctuidae, and about 26 species are found associated with agriculturally important crops in India and some other countries of world. They are medium-sized, stoutly built moths. They are nocturnal and attracted to light. Labial palp is well developed. Crochets on the larval prolegs are all of one size and arranged in a semi-circle.

[#580] The chemical compound produced by millipedes for their own defence is
Correct Answer

(C) Hydrogen cyanide

Explanation

Solution: The chemical compound produced by millipedes for their defense is Hydrogen cyanide. Their primary defense mechanisms consist of coiling up and secreting toxins from the sides of their body. Within these secretions, a variety of irritating chemicals have been identified, some of which include hydrogen cyanide, hydrochloric acid, hydroquinones, benzoquinones, alkaloids, and phenols.