Agricultural Entomology - Study Mode

[#481] Which of the following pairs is not correctly matched on the term of Insect and Family?
Correct Answer

(A) Pectinophora gossypiella ⇔ Pyrrhocoreidae

Explanation

Solution: A. Pectinophora gossypiella ⇔ Pyrrhocoreidae is not correctly matched. The pink bollworm (Pectinophora gossypiella) is an insect known for being a pest in cotton farming. It belongs to Gelechiidae family. B. Earias vittella ⇔ Nolidae Earias vittella, an Asian "spotted bollworm", is a moth species in the family Nolidae. The species was first described by Johan Christian Fabricius in 1794. Most records are from Asia, Australia and certain Pacific islands. C. Helicoverpa armigera ⇔ Noctuidae Helicoverpa armigera is a species of Lepidoptera in the family Noctuidae. The larvae feed on a wide range of plants, including many important cultivated crops. It is a major pest in cotton and one of the most polyphagous and cosmopolitan pest species. D. Bemisia tabaci ⇔ Aleyrodidare Bemisia tabaci belongs to family Aleyrodidae and is a global pest that is responsible for economically important losses to horticultural, fibre and ornamental crops worldwide.

[#482] Maternal care behaviour is observed in females of
Correct Answer

(C) Dermaptera

Explanation

Solution: Maternal care behaviour is observed in females of Dermaptera. Dermaptera species are among the few non-social insect species that show maternal care. Female species may care for their eggs, and even after they have hatched nymphs will continue to watch over offspring until their second molt. Another distinct maternal care unique to earwigs is that the mother continuously cleans the eggs to protect them from fungi.

[#483] Best nematode extraction method for all stage nematode is
Correct Answer

(C) Cobbs sieving and decanting method

Explanation

Solution: Best nematode extraction method for all-stage nematode is Cobbs sieving and decanting method. This method is to submerge a plant sample in water in a Petri dish and directly select the nematodes for further identification using the microscope. This set of 5 stainless steel sieves can be used for extracting nematodes with Cobb's method: decanting and sieving. The high extraction efficiency is obtained using only this small set of sieves and little water. The set contains 5 sieves with a decreasing mesh sizes being 1000 μm, 365 μm, 180 μm, 105 μm and 45 μm.

[#484] The type of legs of grass hopper is
Correct Answer

(D) Saltorial type

Explanation

Solution: The type of legs of grass hopper is Saltorial type. Saltatorial is a phrase used to describe the legs of some insects and other invertebrates that are modified for jumping. Grasshoppers and crickets have saltatorial hind legs. The legs are much larger than the other two pairs of legs and allow these insects to jump a considerable distance.

[#485] In world, first field release of Bt cotton was in
Correct Answer

(B) 1996

Explanation

Solution: In world, first field release of Bt cotton was in 1996. Bt cotton is a genetically modified pest-resistant plant cotton variety, which produces an insecticide to combat bollworms. Bt cotton was first approved for field trials in the United States in 1993 and first approved for commercial use in the United States in 1996. Bt cotton was approved by the Chinese government in 1997. In 2002, a joint venture between Monsanto and Mahyco introduced Bt cotton to India.