Agricultural Entomology - Study Mode

[#166] Which of the following crop has the outbreak of wooly aphid been noticed recently?
Correct Answer

(A) Sugarcane

Explanation

Solution: Sugarcane crop has had the outbreak of wooly aphids noticed recently. Sugarcane woolly aphid, Ceratovacuna lanigera Zehntner has been recently reported in outbreak proportions from western and southern India. Though the pest was first reported from West Bengal in 1958 and later from other parts of Northeast India, it had not made its way to other parts of India.

[#167] Which of the following types of mouth parts is possessed by plant parasitic nematodes?
Correct Answer

(D) Protrusible hollow stylet

Explanation

Solution: Protrusible hollow stylet types of mouth parts are possessed by plant parasitic nematodes. At the head of a plant-parasitic nematode is a hollow mouth spear (like a hypodermic needle) called a stylet. The mouth cavity is armed with a protrusible stylet in the form of a hollow needle, which is used to puncture plants to obtain liquid food. The nematode uses this stylet to puncture plant cells, withdraw food, and also to secrete protein and metabolites that aid the nematode in parasitizing the plant.

[#168] Nematode fungus interaction was first reported by
Correct Answer

(D) Atkinson

Explanation

Solution: Nematode fungus interaction was first reported by Atkinson. The first example of a nematode-fungi disease complex in plants was described by Atkinson, in 1892, where he reported that the fusarium wilt of cotton was more severe in the presence of root-knot nematodes.

[#169] Cosmopolites sordidus the banana rhizomes weevil belong to
Correct Answer

(B) Cucurlionidae

Explanation

Solution: Cosmopolites sordidus the banana rhizomes weevil belong to Cucurlionidae. Cosmopolites sordidus , commonly known as the banana root borer, banana borer, or banana weevil is a species of weevil in the family Curculionidae. It is a pest of banana cultivation and has a cosmopolitan distribution, being found in all parts of the world in which bananas are grown. It is considered the most serious insect pest of bananas.

[#170] Fan-like Antenna is present in
Correct Answer

(C) Strepsipterans

Explanation

Solution: Fan-like Antenna is present in Strepsipterans. The Strepsiptera are an order of insects with eleven extant families that include about 600 described species. The Stylopidae have four-segmented tarsi and four- to six-segmented antennae, with the third segment having a lateral process. Males of the Strepsiptera have wings, legs, eyes, and antennae. The hindwings are generally fan-shaped, and have strongly reduced venation. The antennae are flabellate, and are covered in specialized chemoreceptors.