Agricultural Entomology - Study Mode
[#571] Botanical which is harmful to pollinators
Correct Answer
(A) Sabadilla
Explanation
Solution: Botanical Sabadilla is harmful to pollinators. Schoenocaulon officinale, called sabadilla, is a species of flowering plant in the genus Schoenocaulon, native to Mexico, Central America, and Venezuela. It is highly toxic, containing veratridine, cevadine, and other alkaloids. Its seeds were used by pharmacists around the world to prepare delousing solutions and insecticides. It is still collected and used locally to rid domestic animals of fleas, ticks, lice, and other parasites, and attempts are being made to revive the industry.
[#572] Which pest is migrated from India?
Correct Answer
(D) Sitophilus oryzae
Explanation
Solution: Sitophilus oryzae pest migrated from India. The rice weevil (Sitophilus oryzae) is a stored product pest that attacks seeds of several crops, including wheat, rice and maize. The adults are usually between 3 and 4.6 mm long, with a long snout. The body colour appears to be brown/black, and four orange/red spots are arranged in a cross on the wing covers. Control of weevils involves locating and removing all potentially infested food sources. Rice weevils in all stages of development can be killed by freezing infested food below -18°C (0°F) for three days or heating it to 60°C (140°F) for 15 minutes.
[#573] Uricose gland is present in which insect
Correct Answer
(B) Male cockroach
Explanation
Solution: Uricose gland is present in male cockroach insects. The occurrence of uricose glands in the male reproductive system appears to be unique for the Blattaria. These glands in male cockroach are reproductive structures but it also helps in excretion. These glands are tubular structure emerging from utricular gland. It stores uric acid and discharges it over the spermatophore during copulation.
[#574] Kdr gene in housefly is present in chromosome no.
Correct Answer
(A) 3
Explanation
Solution: Kdr gene in houseflies is present in chromosome no. 3. Knockdown resistance (kdr) is a well-characterized mechanism of resistance to pyrethroid insecticides in many insect species and is caused by point mutations of the pyrethroid target site the para-type sodium channel. The term knockdown resistance (kdr) describes cases in which insects have become resistant to DDT or pyrethroids through a reduced sensitivity in the nervous system.
[#575] In slug caterpillars . . . . . . . . pairs of prolegs are present.
Correct Answer
(D) Absent