Agricultural Entomology - Study Mode
[#341] Important trisaccharides present in insect blood is
Correct Answer
(D) Melisitose
Explanation
Solution: Important trisaccharides present in insect blood is Melisitose. Melezitose, also spelled melicitose, is a nonreducing trisaccharide sugar that is produced by many plant sap eating insects, including aphids such as Cinara pilicornis, by an enzyme reaction. This is beneficial to the insects, as it reduces the stress of osmosis by reducing their water potential. It can be partially hydrolyzed to glucose and turanose the latter of which is an isomer of sucrose.
[#342] Black trap is used for
Correct Answer
(D) Mosquito and flies
[#343] The spider, ticks and mites belong to the Arthropod class
Correct Answer
(C) Arachnida
Explanation
Solution: The spider, ticks and mites belong to the Arthropod class Arachnida. Arachnida is a class of joint-legged invertebrate animals, in the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. The term is derived from the Greek word (Arachne, 'spider'), from the myth of the hubristic human weaver Arachne, who was turned into a spider. Adult arachnids have eight legs attached to the cephalothorax, although the frontmost pair of legs in some species has converted to a sensory function, while in other species, different appendages can grow large enough to take on the appearance of extra pairs of legs.
[#344] Koshi disease of citrus is caused by
Correct Answer
(A) Dialeurodes citri
Explanation
Solution: Koshi disease of citrus is caused by Dialeurodes citri. Citrus greening is spread by a disease-infected insect, the Asian citrus psyllid, and has put the future of America's citrus at risk. Infected trees produce fruits that are green, misshapen and bitter, unsuitable for sale as fresh fruit or for juice.
[#345] Chirkey disease of cardamom is transmitted by
Correct Answer
(A) Corn aphid
Explanation
Solution: Chirkey disease of cardamom is transmitted by Corn aphids. Chirke is caused by Large Cardamom Chirke Virus, a new virus species under the genus Macluravirus, family Potyviridae and is characterized by mosaic with pale streak on the leaves. The streaks turn pale brown resulting in drying, withering of leaves and finally death of the plants. The chirke disease is transmitted by mechanical sap inoculation and also by aphid, Ropalosiphum maidis Fitch. The cultivar Kopringe is resistant to chirke.