Agricultural Entomology - Study Mode

[#206] Silver fish belonging to the order
Correct Answer

(C) Thysanura

Explanation

Solution: Silver fish belonging to the order Thysanura. The silverfish (Lepisma saccharinum) is a species of small, primitive, wingless insect in the order Zygentoma (formerly Thysanura). Its common name derives from the insect's silvery light grey colour, combined with the fish-like appearance of its movements. The silverfish is a nocturnal insect typically 13 - 25 mm (0.5 - 1.0 in) long. Its abdomen tapers at the end, giving it a fish-like appearance.

[#207] Insect vector of African sleeping sickness (caused by Trypanosoma gambiense) is
Correct Answer

(D) Tse-tse flies

Explanation

Solution: Insect vector of African sleeping sickness (caused by Trypanosoma gambiense) is Tse-tse flies. African Trypanosomiasis, also known as “sleeping sickness”, is caused by microscopic parasites of the species Trypanosoma brucei. It is transmitted by the tsetse fly (Glossina species), which is found only in sub-Saharan Africa. The tsetse fly, Glossina sp. is the main vector for trypanosomes, the parasites that cause trypanosomiasis. This disease affects both humans and livestock.

[#208] Dorsum of insects containing meso and meta notum is called
Correct Answer

(B) Alinotum

Explanation

Solution: Dorsum of insects containing meso and meta notum is called Alinotum. Alinotum is the plate to which the wings are attached on the notum of an insect. The pterothoracic nota (comprising the meso- and metathoracic segments) have two main divisions that are the anterior wing-bearing alinotum and the posterior phragma-bearing postnotom. The mesothorax and metathorax have become so intimately associated with the wings that they have almost become a subunit separate from the prothorax, and as such the two segments combined are often referred to as the pterothorax.

[#209] Curling of leaf upwards and yellowing of terminal cotton shoots is characteristic symptom of presence of
Correct Answer

(A) Cotton Aphid (Aphis gossypii)

Explanation

Solution: Curling of the leaf upwards and yellowing of terminal cotton shoots is characteristic symptom of presence of Cotton Aphid (Aphis gossypii). Cotton Leaf Curl Virus (CLCuV) illness is a major impediment to cotton production. It is caused by a genus of viruses known as Begomovirus, which is spread by whiteflies and poses a serious threat to the cotton crop. The very characteristic symptoms include leaf curling, darkened veins, vein swelling, and enations that frequently develop into cup-shaped, leaf-like structures on the undersides of leaves.

[#210] Fish fly belongs to which order?
Correct Answer

(C) Megaloptera

Explanation

Solution: Fish fly belongs to Megaloptera order. Megaloptera is an order of insects. It contains the alderflies, dobsonflies and fishflies, and there are about 300 known species. Flying fish live in all the oceans, particularly in tropical and warm subtropical waters. Fully broadened neural arches act as more stable and sturdier sites for these connections, creating a strong link between the vertebral column and cranium.