Agricultural Entomology - Study Mode
[#111] Stylets are present in the mouth parts of following
Correct Answer
(A) Plant bug
Explanation
Solution: Stylets are present in the mouth parts of Plant bugs. Both mandibles and maxillae are modified into long slender sclerotized hair-like structure called stylets. They are lying close together and suited for piercing and sucking. The tips of the stylets may have minute teeth for piercing the plant tissue. The inner maxillary stylets are doubly grooved on their inner faces.
[#112] Trifurcate/digitate like mucron is present in
Correct Answer
(C) Aphelenchoides sp.
Explanation
Solution: Trifurcate/digitate like mucron is present in Aphelenchoides sp. Aphelenchoides is a genus of mycetophagous nematodes. Some species are plant pathogenic foliar nematodes. Aphelenchoides ritzemabosi is a major pest of Chrysanthemum and one of the most important species to attack ornamentals. Adults are about 1 mm long, and usually overwinter in the dormant buds and shoot tips of chrysanthemum stools.
[#113] Single chambered heart is present in which insect order?
Correct Answer
(D) Both A and B
Explanation
Solution: The single chambered heart is present in Mallophaga and Anoplura insect order. The number of chambers in an insect heart varies with grasshoppers having eight, for instance, and cockroaches a whopping thirteen. Each chamber of the heart has two holes called ostia. These have valves so that blood only flows one way from the pool of haemolymph in the body into the heart. The circulatory system is an open one, with most of the body fluid, or hemolymph, occupying cavities of the body and its appendages.
[#114] Female Bombyx pupa is identified by its 'X' mark on the ventral side of segment
Correct Answer
(B) 8 th
Explanation
Solution: Female Bombyx pupa is identified by its 'X' mark on the ventral side of 8 th segment. Males are smaller in size whereas females are plumpier. Males have a small brown, glossy spot just below the 8 th abdominal segment. In females, there is a division of the segment which is represented by a dark line or ‘X’ marking between 8 th and 9 th abdominal segments.
[#115] Carrot broth method is used for mass multiplication of
Correct Answer
(B) Green muscardine fungus
Explanation
Solution: Carrot broth method is used for mass multiplication of Green muscardine fungus. Carrot Broth One-Step is a selective and differential medium that is intended for the detection of Group B Streptococcus. Green muscardine disease is the presentation of a fungal infection of insects caused by members of the Metarhizium or Nomuraea species. Carrot roots were selected for mass production of mycorrhizal spores among tomato, potato, sweet potato, soybean, amaranths and carrots through the root organ culturing method.