Agricultural Entomology - Study Mode

[#486] Type of respiration found in head louse is
Correct Answer

(D) Hypopneustic

Explanation

Solution: Type of respiration found in head louse is Hypopneustic. The head louse (Pediculus humanus capitis) is an obligate ectoparasite of humans. Seven segments of the louse abdomen are visible. The first six segments each have a pair of spiracles through which the insect breathes. The meaning Hypopneustic is having some of the respiratory spiracles lacking or nonfunctional used chiefly by larval insects.

[#487] Surul poochi prefers which variety of Groundnut?
Correct Answer

(B) Bunch type

Explanation

Solution: Surul poochi prefers Bunch type variety of Groundnut. The varieties under cultivation fall into three habit groups. They are bunch (pish/Valencia), semi-spreading (Virginia bunch) and spreading (Virginia runner). Bunch types are preferred where the rainy season is short and also for irrigated crops in rabi and summer seasons. Where the soils have high clay content and harvesting is a problem, bunch types are preferred.

[#488] Following chemical belongs to Juvenoids group
Correct Answer

(C) Both A and B

Explanation

Solution: Fenoxycarb and Pyriproxyfen chemical belongs to Juvenoids group. Fenoxycarb is non-neurotoxic and does not have the same mode of action as other carbamate insecticides. It prevents immature insects from reaching maturity by mimicking juvenile hormones. Pyriproxyfen is a pesticide which is found to be effective against a variety of insects. It is a juvenile hormone analog and an insect growth regulator. It prevents larvae from developing into adulthood and thus rendering them unable to reproduce.

[#489] In paddy, the elongation of leaf sheath, when infested by gall fly (Orseolla oryzae) is due to a chemical known as
Correct Answer

(C) Cecidogen

Explanation

Solution: In paddy, the elongation of leaf sheath, when infested by gall fly (Orseolla oryzae) is due to a chemical known as Cecidogen. The active substance, cecidogen secreted from the saliva of gall midge larva and the larval feeding on the meristematic tissue of terminal and auxiliary shoot apices in rice plants are responsible for gall formation (silver-shoot) in rice. Orseolia oryzae, also called the Asian rice gall midge, is a species of small fly in the family Cecidomyiidae. It is a major insect pest of rice.

[#490] Biopesticide 'Naturalis' is a formulation of
Correct Answer

(A) Beauveria bassiana

Explanation

Solution: Biopesticide 'Naturalis' is a formulation of Beauveria bassiana. Naturalis-L is a bio-insecticide for the control of whitefly including the glasshouse whitefly. Beauveria bassiana is a fungus that grows naturally in soils throughout the world and acts as a parasite on various arthropod species, causing white muscardine disease. It is used as a biological insecticide to control several pests, including termites, thrips, whiteflies, aphids and various beetles.