Agricultural Entomology - Study Mode

[#441] Certain secretions attract the opposite sex of the same species which are termed as
Correct Answer

(D) Pheromones

Explanation

Solution: Certain secretions attract the opposite sex of the same species which are termed Pheromones. Pheromones are substances that are secreted to the outside by an individual and received by a second individual of the same species. Many examples exist in animals but their role in humans remains uncertain since adults have no functioning vomeronasal organ, which processes pheromone signals in animals.

[#442] Following is the insecticide which is having fumigant and penetrant action
Correct Answer

(B) DDVP

Explanation

Solution: DDVP is an insecticide which is having fumigant and penetrant action. Dichlorvos (2,2-dichlorovinyl dimethyl phosphate, commonly abbreviated as an DDVP) is an organophosphate widely used as an insecticide to control household pests, in public health, and to protect stored products from insects. It is a contact and stomach insecticide with fumigant and penetrant action. It works on wide range of chewing and sucking pests on a wide range of economically important crops. Fast knock-down effect and kills target pests instantly.

[#443] AICRP on pesticide residue started in the year
Correct Answer

(B) 1984

Explanation

Solution: AICRP on pesticide residue started in the year 1984. AICRP is a scheme of Indian Council of Agricultural Research for the development/testing/identification of technologies through multi-location trials. The All India Coordinated Research Project (AICRP), a landmark in the history of agricultural research was extended to fruit crops during Fourth Five Year Plan. In this system, both central research institutes and State Agricultural Universities (SAUs) work as a team to find solutions to various problems.

[#444] What type of mouth parts found in spotted boll worm?
Correct Answer

(A) Chewing and cutting type

Explanation

Solution: Insect mouthparts are specialized structures adapted to their feeding habits. Chewing and cutting type mouthparts include strong mandibles used to bite, cut, and grind solid food. Piercing and sucking type mouthparts resemble needles or straws and are used to suck plant sap or animal blood. Spotted bollworm (Earias vitella) is a larval pest that bores into cotton bolls, flower buds, and shoots. It feeds by chewing and cutting plant tissues from the inside after entering the boll. The larvae do not suck sap or liquid but rather eat the solid internal parts of the cotton boll. Hence, the spotted bollworm has chewing and cutting type mouthparts, not piercing and sucking type. Therefore, the correct answer is Option A: Chewing and cutting type.

[#445] Which wasp family is parasitic on mantid eggs?
Correct Answer

(B) Podagrionidae

Explanation

Solution: Podagrionidae wasp family is parasitic on mantid eggs. The adult Mantidophaga wasp lives out its life on a host Praying Mantis. Then, when a female mantis lays her eggs, the Mantidophaga will place its eggs directly into the foamy ootheca as it is being deposited.