Agricultural Entomology - Study Mode
[#296] Thatta rog disease of silkworm is caused by
Correct Answer
(B) Bacteria
[#297] In Drosophila DDT is converted to
Correct Answer
(D) Dicofol
Explanation
Solution: In Drosophila DDT is converted to Dicofol. Dicofol is an organochlorine pesticide that is chemically related to DDT. Specifically, it is used as a miticide against the red spider mite. Though difocol is not extremely toxic, its use is controverial because one of the intermediates used in its production is DDT.
[#298] Aedes aegyptii transmits
Correct Answer
(C) Both A and B
Explanation
Solution: Aedes aegyptii transmits Yellow fever and Dengue. Aedes aegypti is known to transmit the dengue virus, yellow fever virus, chikungunya virus, and Zika virus. It has been suggested as a potential vector of Venezuelan Equine Encephalitis virus and vector competency studies have shown that Aedes aegypti is capable of transmitting West Nile virus.
[#299] The scientific name of cotton jassid
Correct Answer
(A) Amrasca bigutulla
Explanation
Solution: The scientific name of cotton jassid is Amrasca bigutulla. It is a subspecies of leafhopper belonging to the subfamily Typhlocybinae of family Cicadellidae. It is a pest of cotton, okra, and other crops in southern Asia and West Africa. It is yellowish-green, with a conspicuous black spot on either side of the head and another near the tip of the fore wing. The head is pale green and the membranous wings are transparent and iridescent.
[#300] Peseudocoli is present instead of antennae for light perception in which order?
Correct Answer
(B) Protura
Explanation
Solution: Pseudoculi is present instead of antennae for light perception in Protura order. Pseudoculus (plural pseudoculi, Latin oculus 'eye') is the name applied to various eye-like structures which are nevertheless not eyes. Amongst the organisms possessing pseudoculi are Protura, which their function is not well-known. The Protura, or proturans, and sometimes nicknamed coneheds, are very small, soil-dwelling animals, so inconspicuous they were not noticed until the 20 th century. The head is conical and bears two pseudoculi with unknown functions.