Agricultural Entomology - Study Mode
[#241] In which insects vas deferens is a long coiled tube called as epididymis?
Correct Answer
(C) Coleoptera
Explanation
Solution: In Coleoptera insects vas deferens is a long coiled tube called as epididymis. Beetles are insects that form the order Coleoptera, in the superorder Endopterygota. Their front pair of wings are hardened into wing cases, elytra, distinguishing them from most other insects. Epididymis is a narrow, tightly-coiled tube that is attached to each of the testicles. It is a long tube that is located near each testicle. The epididymis is the tube that moves the sperm from the testicles.
[#242] Locust swarms often enter India from the state of
Correct Answer
(D) Rajasthan
Explanation
Solution: Locust swarms often enter India from the state of Rajasthan. Desert locusts can be considered to be natives of Saudi Arabia or the Arabian Peninsula. Following the monsoon winds, they arrive in India Rajasthan and Gujarat particularly - every year. An average of 10 locust attacks or swarms are seen in India in a normal year. The gregarious form arises from an increase in population density which causes the locusts to aggregate. Locusts need to multiply, concentrate and aggregate for swarms to form.
[#243] Which wasp is parasitic on ootheca of cockroach?
Correct Answer
(B) Ensign wasp
Explanation
Solution: Ensign wasp is parasitic on ootheca of cockroach. The female ensign wasps seek out cockroach egg cases, known as ootheca, where she will lay an egg in one of the cockroach eggs inside the egg case. The wasp's egg hatches and the larva eats the egg which was laid. Successive instars of the larva eat the other eggs within the egg case.
[#244] The insects which are both forward and back ward running habit
Correct Answer
(B) Embioptera
Explanation
Solution: The insects which are both forward and backward running habit Embioptera. The name Embioptera ("lively wings") comes from Greek ( embios ), meaning "lively", and ( pteron ), meaning "wing", a name that has not been considered to be particularly descriptive for this group of fliers, perhaps instead referring to their remarkable speed of movement both forward and backward. On landing, these chambers deflate and the wings become flexible, folding back against the body. Wings can also fold forwards over the body, and this, along with the flexibility allows easy movement through the narrow silk galleries, either forwards or backwards, without resulting in damage.
[#245] The vector of rice tungro disease is
Correct Answer
(A) Nephotettix virescens
Explanation
Solution: The vector of rice tungro disease is Nepholettix virescens. Tungro virus disease is transmitted by leafhoppers, wherein the most efficient vector is the green leafhopper, Nephotettix virescens. The disease complex is associated with the rice tungro baciliform virus (RTBV) and rice tungro spherical virus (RTSV). RTBV cannot be transmitted by leafhoppers unless RTSV is present.