Agricultural Entomology - Study Mode
[#526] Degenerated ocelli of cockroach is called is
Correct Answer
(B) Fenestra
Explanation
Solution: Degenerated ocelli of cockroach is called is Fenestra. The ocelli are paired circular areas one on each side of the eye, near the base of the antennae. Each area acts as a simple eye and is responsible for detecting light. Ocelli or fenestrae of cockroach take part in perception of light. They help the cockroaches to detect food and other objects. Fenestrae are simple eyes.
[#527] The dwelling place of termites is also known as
Correct Answer
(C) Mound
Explanation
Solution: The dwelling place of termites is also known as Mound. The meaning of Mound is to enclose or fortify with a fence or a ridge of earth. It is a heaped pile of earth, gravel, sand, rocks, or debris. Mound-building termites are a group of termite species that live in mounds. The structure of the mounds can be very complicated. Inside the mound is an extensive system of tunnels and conduits that serves as a ventilation system for the underground nest.
[#528] Cell necrosis of localized areas is induced by
Correct Answer
(A) Helicotylenchus
Explanation
Solution: Cell necrosis of localized areas is induced by Helicotylenchus. Helicotylenchus is a genus of nematodes in the family Hoplolaimidae. They are known generally as spiral nematodes. Helicotylenchus multicinctus causes small necrotic lesions on roots, and with heavy infestation these lesions coalesce, leading to root necrosis and die-back of roots. Plant stunting and reduction in yield. It can cause enough root necrosis that it seriously weakens the plant.
[#529] Dimethoate is
Correct Answer
(B) Systemic insecticide
Explanation
Solution: Dimethoate is Systemic insecticide. Dimethoate is a widely used organophosphate insecticide and acaricide. It was patented and introduced in the 1950s by American Cyanamid. It is readily absorbed and distributed throughout plant tissues, and is degraded relatively rapidly. Dimethoate is a systemic and contact organophosphorus insecticide registered for use in the U.S. in 1962 and used on several field grown crops, tree crops and ornamentals.
[#530] Arborescent malphighian tubules are found in
Correct Answer
(C) Galleria sp.
Explanation
Solution: Arborescent malphighian tubules are found in Galleria sp. The Malpighian tubule system is a type of excretory and osmoregulatory system found in some insects, myriapods, arachnids and tardigrades. Arborescent refers to resemblance as a tree in growth or appearance. And the malphigian tubule system consists of branching tubules that resemble branches of trees extending from the alimentary canal that absorbs solutes, water, and wastes from the surrounding hemolymph.