Agricultural Entomology - Study Mode
[#261] What is the ratio of parastiod : host eggs in trichocard production?
Correct Answer
(B) 1 : 6
Explanation
Solution: 1 : 6 is the ratio of parasitoid: host eggs in trichocard production. The emerging parasites readily parasitize the fresh eggs. The parasitoid-host ratio is adjusted accordingly to 1 : 6 to get effective parasitism. The parasitized eggs in the Tricho Card turn back in 3 or 4 days and the adult parasitoids emerge in 8 to 10 days from the date of parasitization.
[#262] The pest which attack both in field and storage of pulses is
Correct Answer
(A) Pulse beetle
Explanation
Solution: The pest which attacks both in the field and storage of pulses is Pulse beetle. The most important insects damaging pulses in field and storage are referred to as bruchids or pulse beetles. Adult pulse beetles, being very weak and having a short life, cannot move in grain mass and are restricted to top 15 cm layer. Even the adults emerging out of the infected material cannot move in the intergranular space and could die before mating. Movement of adult pulse beetle can be prevented by placing a 7 - 10 cm layer of dry sand at the top of grain mass.
[#263] Perilissus cingulator is the larval Parasitoid of
Correct Answer
(C) Mustard sawfly
Explanation
Solution: Perilissus cingulator is the larval Parasitoid of a Mustard sawfly. It is greenish-black with a wrinkled body and eight pairs of pro-legs. On slightest touch the larva falls to round and feigns death. The larvae had 6 instars, fed on the leaves, and pupated after 14 - 16 days.
[#264] India have monopoly in which silk
Correct Answer
(A) Munga
Explanation
Solution: India has monopoly in Munga silk. Muga silk is a variety of wild silk geographically tagged to the state of Assam in India. The silk is known for its extreme durability and has a natural yellowish-golden tiny with a shimmering, glossy texture. It was previously reserved for the use of royalty. India produced 158 tonnes of muga silk in FY 2014 - 15, out of which 136 tonnes were produced in Assam. India's total silk output in the same period amounted to 28,708 tonnes.
[#265] The noctuid which is common pest to both pigeonpea and chickpea is
Correct Answer
(C) Helicoverpa armigera
Explanation
Solution: The noctuid which is common pest to both pigeonpea and chickpeas is Helicoverpa armigera. Helicoverpa armigera is a species of Lepidoptera in the family Noctuidae. It is known as the cotton bollworm, corn earworm, or scarce bordered straw. The larvae feed on a wide range of plants, including many important cultivated crops. The greatest damage is caused to cotton, tomatoes, maize, pigeon peas, chick peas, alfalfa, and tobacco.