Agricultural Entomology - Study Mode
[#561] . . . . . . . . is an important major pest species in the complex of pests attacking a crop.
Correct Answer
(C) Key pest
Explanation
Solution: Key pest is an important major pest species in the complex of pests attacking a crop. A pest is any animal or plants harmful to humans or human concerns. It is any living thing, whether animal, plant, or fungus, that humans consider troublesome to themselves, their possessions, or the environment. Agricultural and horticultural crops are attacked by a wide variety of pests, the most important being insects, mites, nematodes and gastropod molluscs. The damage they do results both from the direct injury they cause to the plants and from the indirect consequences of the fungal, bacterial, or viral infections they transmit.
[#562] Highest chromosomal number is seen in
Correct Answer
(B) Morus nigra
Explanation
Solution: The highest chromosomal number is seen in Morus nigra. Morus nigra, called black mulberry, is a species of flowering plant in the family Moraceae. It is a deciduous tree growing to 12 metres tall by 15 m broad. The leaves are 10 - 20 centimetres long by 6 - 10 cm broad - up to 23 cm long on vigorous shoots, downy on the underside, and the upper surface rough with very short, stiff hairs. The black mulberry is known for its large number of chromosomes. It has 308 (44x ploidy) chromosomes.
[#563] Mustard aphid belong to family
Correct Answer
(B) Aphididae
Explanation
Solution: Mustard aphids belong to the family Aphididae. Lipaphis erysimi is a species of aphid of the family Aphididae. Its common names include mustard aphid and turnip aphid. It is found in most temperate and tropical areas of the world and feeds only on cruciferous plants.
[#564] Following are the egg parasitoids
Correct Answer
(D) All the above
Explanation
Solution: Trichogrammatidae, Scelionidae and Evanidae are the egg parasitoids. Egg parasitoids are specialized to attack the eggs of many arthropod species belonging to the Hexapoda but also spiders (Araneae). During oviposition, the embryo is killed and the immature wasp feeds on it until the completion of its development. Egg parasitoids e.g. Trichogramma & Telenomus wasps. Larval parasitoids e.g. Netelia producta (Orange caterpillar parasite) & Tachinid flies. Larval - pupal parasitoids e.g. Heteropelma scaposum (Two-toned parasite) Pupal parasitoid - Ichneumon promissorius (Banded caterpillar parasite).
[#565] One of the major insect enemy of honey bee is
Correct Answer
(B) Galleria mellonella
Explanation
Solution: One of the major insect enemies of honey bees is Galleria mellonella. The greater wax moth, Galleria mellonella Linnaeus, is a ubiquitous pest of the honeybee, Apis mellifera Linnaeus and Apis cerana Fabricius. The greater wax moth larvae burrow into the edge of unsealed cells with pollen, bee brood, and honey through to the midrib of honeybee comb.