Agricultural Entomology - Study Mode
[#76] Scientific name of the Dammer bee is
Correct Answer
(B) Melipona irridipennis
Explanation
Solution: Scientific name of the Dammer bee is Melipona irridipennis. The Indian stingless bee or dammar bee, Tetragonula iridipennis, is a species of bee belonging to the family Apidae, subfamily Apinae. Many older references erroneously placed this species in Melipona, an unrelated genus from the New World and until recently it was placed in Trigona, therefore still often mistakenly referred to as Trigona iridipennis.
[#77] Pouch like antennae are found in
Correct Answer
(A) Horse fly
Explanation
Solution: Pouch like antennae is found in Horse fly. Horse-flies or horseflies are true flies in the family Tabanidae in the insect order Diptera. They are often large and agile in flight, and only the female horseflies bite animals, including humans, to obtain blood. The terminal segment of the antennae is pointed and annulated, appearing to be made up of several tapering rings. No hairs or arista are arising from the antennae. In the Pangoniinae, ocelli are present and the antennal flagellum (whip-like structure) usually has eight annuli or rings.
[#78] Mealybug is severely affect the crop of
Correct Answer
(D) Mango
Explanation
Solution: Mealybug severely affects the crop of Mango. Mango mealybug (Drosicha mangiferae), is a pest of mango crops in Asia. The nymphs and females suck plant sap from inflorescences, tender leaves, shoots and fruit peduncles. There is a range of cultural, chemical and non-chemical techniques for minimizing damage to the mango crop, for example the use of physical barriers to stop Drosicha mangiferae nymphs from crawling up the stem of mango trees, by wrapping plastic sheets or sticky bands around the tree stem.
[#79] T shaped marking on marble sized mango fruits and at later stages feeding on cotyledons is characteristic symptoms of
Correct Answer
(C) Sternochetus mangiferae
Explanation
Solution: T shaped marking on marble sized mango fruits and at later stages feeding on cotyledons are characteristic symptoms of Sternochetus mangiferae. Mango nut weevil grubs feed pulp, endocarp of marble sized fruits and cause 'T- shaped marking on the fruit surface and causes fruit drop. Sternochetus mangiferae is a weevil commonly known as the mango seed weevil, mango stone weevil, or mango weevil. It is a compact weevil typical of the Cryptorhynchinae. The adult female lays eggs on the surface of the mango fruit. Larvae and pupae develop inside the fruit and adults emerge, cutting their way out of the seed and pericarp after the fruit falls and decays.
[#80] Car blight disease of Italian millet is caused by
Correct Answer
(A) Aphelenchoides besseyi
Explanation
Solution: Car blight disease of Italian millet is caused by Aphelenchoides besseyi. Aphelenchoides besseyi is a plant pathogenic nematode. It is sometimes referred to as rice white tip, spring dwarf, strawberry bud, flying strawberry nematode or strawberry crimp disease nematode. A. besseyi is an ectoparasitic nematode which means it feeds on the plant tissue externally. These nematodes can also cause stunting and sterility with yield losses of up to 50%.