Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Nuclear polyhedral virus is the effective pathogen on Helicoverpa armigera.
Helicoverpa armigera nuclear polyhedrosis virus (HaNPV) is a specific entomophatogenic virus isolated from cadaver of Helicoverpa armigera larvae.
Helicoverpa armigera single nucleopolyhedrovirus (HearSNPV) is a virulent pathogen of lepidopterans in the genera Heliothis and Helicoverpa, whereas Helicoverpa armigera multiple nucleopolyhedrovirus (HearSNPV) is a different virus species with a broader host range.

Anthia sexguttata have Biting and Chewing type of mouth part.
Anthia sexguttata, the six-spot ground beetle, is a beetle of the Family Carabidae.
It is formed of two walls the dorsal thick chitinous and the ventral thin and membranous. The dorsal and the ventral surfaces of the postclypeus are glabrous.
The labrum is a large, thick, chitinous and rectangular sclerite movably articulated to the preclypeus by a clypeolabral suture. Its dorsal surface is pubescent.
All the incisors and molars of the right and left mandibles are monocuspid. The mandibles form an efficient organ for seizing and grasping prey. The mandible of A. sexguttata is hollowed out and bears a prominent ridge on its dorsal surface.

The source of the Rotenone pesticide is Darris elyptica.
Rotenone is produced by extraction from the roots and stems of several tropical and subtropical plant species, especially those belonging to the genera Lonchocarpus and Derris.
Rotenone is an odorless, colorless, crystalline isoflavone used as a broad-spectrum insecticide, piscicide and pesticide.
It is a commonly used pesticide and is also used in lakes and reservoirs to kill fish that are perceived as pests. Human deaths from rotenone poisoning are rare because its irritating action causes vomiting. Deliberate ingestion of rotenone can be fatal.

The paralysis of honeybees is caused by Viruses.
Chronic Bee Paralysis Virus (CBPV), a widespread honey bee RNA virus, causes massive worker bee losses, mostly in strong colonies.
Two different syndromes, with paralysis, ataxia and flight incapacity on one hand and black hairless individuals with shortened abdomens on the other, can affect a colony simultaneously.

The term "third-generation pesticides" is given to Juvenile hormones.
Juvenile hormone (JH) regulates development and reproductive maturation in insects therefore, interruption of JH biosynthesis has been considered as a strategy for the development of target-specific insecticides.
Synthetic analogues of the juvenile hormone are used as an pesticide, preventing the larvae from developing into adult insects. JH itself is expensive to synthesize and is unstable in light. At high levels of JH, larvae can still molt, but the result will only be a bigger larva, not an adult.

Rangi disease of silkworm is caused by Serratia marcesens.
Serratia marcescens is a species of rod-shaped, Gram-negative bacteria in the family Yersiniaceae.
Rangi disease of silkworms is caused by bacteria Serratia marcesens. The bacterial diseases take a heavy toll on silkworm crop under high humidity. In Karnataka, the annual damage caused by this disease is 20 - 40%.
The spread and infection of disease are mainly by the consumption of contaminated leaves. The dead larvae release pathogens to the surrounding and many are survived in the environment (airborne) within the rearing house.

The gland that helps in the secretion of lac is the Resin gland.
Lac is the resinous secretion of several species of lac insects. Thousands of lac insects colonize the branches of the host trees and secrete the resinous pigment through the gland. The coated branches of the host trees are cut and harvested as sticklac.
The harvested sticklac is crushed and sieved to remove impurities. The sieved material is then repeatedly washed to remove insect parts and other materials. The resulting product is known as seedlac.

A. Banana bunchy top ⇔ Banana aphid
Banana bunchy top is caused by banana bunchy top virus (BBTV), a plant virus transmitted by a small black insect called the banana aphid (Pentalonia nigronervosa).
B. Cotton leaf curl ⇔ White fly
Cotton leaf curl disease (CLCuD) is a viral infection of cotton and other susceptible host plants that are transmitted by Silverleaf whitefly (Bemisia tabaci).
C. Katte disease of cardamom ⇔ Aphid
The plants infected by mosaic or Katte can survive for many years and act as the source of inoculum. The virus is transmitted through the aphid vector Pentalonia caladii.
D. Groundnut bud necrosis virus ⇔ Moth is not correctly matched.
Spread of this virus in peanut/groundnut is mostly monocyclic, and disease incidence in this host depends on infection by thrips, not by moths that acquire the virus from other crops or weed hosts.

Among the given options soldiers caste of termite is sterile.
Castes of termites are primarily divided into two types of individuals: fertile (reproductives) and sterile individuals (neuters).
The sterile castes include workers, presoldiers and soldiers, while the fertile ones are alates, primary reproductives and secondary reproductive.
Soldier termites have distinctively shaped heads and are typically bigger than workers. Their protruding mandibles help them protect their colonies. Soldiers have elongated bodies and are pale red, light brown, or white.