Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Insects are the most abundant and diversified of all animals due to their capacity for flight.
The large populations and great variety of insects are related to their small size, high rates of reproduction, and abundance of suitable food supplies.
The species richness of insects has been enhanced by their relative age, giving time for diversification to take place, capacity of flight also low extinction rates.

The variety resistant to Heterodera avenae in Barley is C-164.
The C-164 variety of Barley is a tall, six-row variety with compact ears and long awns. This grain is usually bold, bright and amber. It is said to be resistant to yellow rust and heterodera avenae.
Heterodera avenae, the cereal cyst nematode or European cyst nematode, is a plant pathogen and an obligate parasite of cereal crops including barley, oats, wheat and rye. Cereal crops infected with this nematode are more susceptible to infection by fungal diseases such as rhizoctonia root rot.

a. Paddy gall fly - Root knot of tomato.
Root-knot nematodes are minute, worm-like animals that are very common in soil. They have a wide host range and cause problems in many annual and perennial crops. Tomatoes are among the most seriously affected, with the nematodes causing problems in all growing areas.
b. Tylenchulus semipenetrans - Citrus nematode.
Tylenchulus semipenetrans, also known as the citrus nematode or citrus root nematode, is a species of plant pathogenic nematodes and the causal agent of the slow decline of citrus. T. semipenetrans is found in most citrus production areas and diverse soil textures worldwide.
c. Heterodera avenae - Cereal root nematode.
Heterodera avenae, the cereal cyst nematode or European cyst nematode, is a plant pathogen and an obligate parasite of cereal crops including barley, oats, wheat and rye. Cereal crops infected with this nematode are more susceptible to infection by fungal diseases such as rhizoctonia root rot.
d. Heterodera tabacum - Tobacco cyst nematode.
Heterodera tabacum is synonym of Globodera tabacum. It is commonly known as a tobacco cyst nematode, a plant-parasitic nematode that mainly infests the tobacco plant, but also plants in family Solanaceae.

Citrus Nematode is Tylenculus.
Tylenchulus semipenetrans, also known as the citrus nematode or citrus root nematode, is a species of plant pathogenic nematodes and the causal agent of the slow decline of citrus. T. semipenetrans is found in most citrus production areas.
Their feeding strategy is semi-endoparasitic and has a very narrow host range among commonly grown crops. These nematodes are considered major plant-parasitic nematode because they can cause 10 - 30% losses reported on citrus trees.

Malathion insecticide has anticholinesterase action on insect nervous system.
Malathion and other organophosphate insecticides bind to the enzyme acetylcholinesterase (AChE) at nerve endings throughout the bodies of insects.
Malathion is a man-made organophosphate insecticide that is commonly used to control mosquitoes and a variety of insects that attack fruits, vegetables, landscaping plants, and shrubs.

Pheromone trap is used for capturing adult males.
A pheromone trap is a type of insect trap that uses pheromones to lure insects. Sex pheromones and aggregating pheromones are the most common types used.
Pheromone traps capture male moths and are used to monitor when the moth flight starts and its population dynamics. Pheromone traps use chemical signals (pheromones) emitted by females to attract a mate (therefore pheromone traps only catch males of that species).

None of the given options is army worm.
The armyworm (Mythimna seperata) is a species in the order Lepidoptera and one of the species of the fall armyworm moths distinguished by their larval life stage.
The term "armyworm" can refer to several species, often describing the large-scale invasive behavior of the species' larval stage. It is regarded as a pest and can damage and destroy a wide variety of crops, which causes large economic damage.

In Hemiptera accessory pulsating organs are present in the Legs.
The dorsal vessel ("heart"), insects have accessory pulsatile organs ("auxiliary hearts") that supply body appendages with hemolymph. They are indispensable in the open circulatory system for hemolymph exchange in antennae, long mouthparts, legs, wings, and abdominal appendages.

The first protective insecticide is DDT.
Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochloride.
DDT was first synthesized in 1874 by the Austrian chemist Othmar Zeidler. DDT's insecticidal action was discovered by the Swiss chemist Paul Hermann Müller in 1939.

Project Directorate of Biological Control is located in Bangalore.
PDBC was the nodal agency in the country that organizes biological control research at the national level with 16 centres spread across the country.
It acts as a nodal agency for collection, characterization, documentation, conservation, exchange, research and utilization of agriculturally important insect resources (including mites, spiders and related arthropods) and insect-derived resources for sustainable agriculture.