Agricultural Entomology - Study Mode

[#221] Sugarcane is recently infested by following wooly aphid
Correct Answer

(A) Ceratovacuno lanigera

Explanation

Solution: Sugarcane is recently infested by Ceratovacuno lanigera wooly aphid. Woolly aphids are sap-sucking insects that produce a filamentous waxy white covering that resembles cotton or wool. The adults are winged and move to new locations where they lay egg masses. The nymphs often form large cottony masses on twigs, for protection from predators. The sugarcane woolly aphid (Ceratovacuna lanigera) is an aphid in the superfamily Aphidoidea in the order Hemiptera. Found in India and Southeast Asia, It is a true bug and sucks sap from plants. It is a foliage sucking aphid species.

[#222] Which insect of mango has quarantine importance
Correct Answer

(A) Stone or nut weevil

Explanation

Solution: Stone or nut weevil insect of mango has quarantine importance. This is an important specific pest of mango especially in South India. The pest affects export potential of mango (quarantine pest). It is a monophagous pest on mango where in varieties, Totapuri and Neelam are highly susceptible. Adults hibernate on the tree trunk during off season.

[#223] Bovicola caprae is a serious pest of
Correct Answer

(A) Goat

Explanation

Solution: Bovicola caprae is a serious pest of Goats. Bovicola is a genus of lice belonging to the family Trichodectidae. Lice are external parasites that spend their entire lives on sheep or goats. Both immature and adult stages suck the blood or feed on the skin. Goat lice are host-specific and only attack goats and their close relatives such as sheep.

[#224] Flooding of the fields will help in control of
Correct Answer

(D) All of these

Explanation

Solution: Flooding of the fields will help in control of White grubs, Termites and Cut worms. White grubs are the immature forms of scarab beetles, the well-known May/June beetles, masked chafer, and Japanese beetle. The grubs, $$frac{1}{4}$$ to over 1 inch (6 - 25 mm) long, are white with brown heads and have six prominent legs. Termites are a group of detritophagous eusocial insects which consume a wide variety of decaying plant material, generally in the form of wood, leaf litter and soil humus. Cutworms are moth larvae that hide under litter or soil during the day, coming out in the dark to feed on plants.

[#225] 'Sterna spatula' is present in which insect?
Correct Answer

(B) Gall midges

Explanation

Solution: 'Sterna spatula' is present in Gall midges insect. Cecidomyiidae is a family of flies known as gall midges or gall gnats. The larva is peripneustic. The head is tiny, cone-shaped, and has two posterolateral extensions. The mouthparts are reduced, with minute styliform mandibles. The relatively prominent antennae are two-segmented. Integumental setae or papillae are important in taxonomy since they are constant in number within groups. The prothorax has sclerotized sternal spatula.