Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

In rice, Brown plant hopper (Nilaparvata lugens) insect causes yellowing and drying of plant leading to condition known as "hopper burn".
The brown planthopper (Nilaparvata lugens) is a planthopper species that feed on rice plants (Oryza sativa L.).
BPH infests the rice crop at all stages of plant growth. Due to feeding by both the nymphs and adults at the base of the tillers, plants turn yellow and dry up rapidly.
During the early infestation stage, round yellow patches appear, which soon become brownish due to the drying up of the plants. This condition is called 'hopper burn'.

Body and wings covered by overlapping scales found in order Lepidoptera.
Lepidoptera is an order of insects that includes butterflies and moths. About 1,80,000 species of the Lepidoptera are described, in 126 families and 46 superfamilies.
The most apparent is the presence of scales that cover the bodies, wings, and a proboscis. The scales are modified, flattened "hairs", and give butterflies and moths their wide variety of colours and patterns. Scales function in insulation, thermoregulation, and producing pheromones.

Island's theory of biological control was given by Smith.
The “Father” of modern biological control, Professor Harry Scott Smith, defined it as the use of natural enemies to control insect pests.
Biological control is the use of living organisms to suppress pest populations, making them less damaging than they would otherwise be. Natural enemies of insects play an important role in limiting the densities of potential pests. These natural enemies include predators, parasitoids, and pathogens.

Type of oesophagus, where oesophagus is dorsally lobed is Hoplolaimus type.
There is an extensive rostrum at the front of the esophagus in all carnivorous snails and slugs. In the freshwater snail species Tarebia granifera, the brood pouch is above the esophagus.
They have a non-muscular or weakly muscled oesophagus. An oesophageal bulb is a specialization and an undifferentiated, gradually enlarging oesophagus more likely represents the primitive type.

Earis vitella is Spotted boll worm.
Earias insulana, the Egyptian stemborer, Egyptian bollworm, spiny bollworm, or cotton spotted bollworm, is a moth of the family Nolidae.
The larvae feed on okra, cotton and hibiscus, but have also been recorded on rice, sugarcane and corn. Initially, the larva tunnels into the buds of its host plant. Later, the larva feeds on the bolls, which become brown and fall off. Secondary invasion by fungi and bacteria sometimes occurs.

The worker bee is Sterile female.
A worker bee is any female (eusocial) bee that lacks the full reproductive capacity of the colony's queen bee; under most circumstances, this is correlated to an increase in certain non-reproductive activities relative to a queen.
Honey bee workers gather pollen into the pollen baskets on their back legs and carry it back to the hive where it is used as food for the developing brood. Pollen carried on their bodies may be carried to another flower where a small portion can rub off onto the pistil, resulting in cross-pollination.

Opistho genital gonophore is present in the terminal segment in Chilopoda.
A gonopore, sometimes called a gonadopore, is a genital pore in many invertebrates. Hexapods, including insects, have a single common gonopore, except mayflies, which have a pair of gonopores.
Chilopoda is any of various long, flattened, many-segmented predaceous arthropods. Each segment except the hindmost bears one pair of legs. In these, gonopores are close to the animal's tail that is in the terminal segment.

Brestan is an antifeedant, which is used against Cutworms.
Antifeedants are organic compounds produced by plants to inhibit attack by insects and grazing animals. Antifeedants exhibit a wide range of activities and chemical structures as biopesticides.
Brestan (triphenyltin acetate) which is used for controlling fungal pathogens of economic crops has been found effective against the potato tuber moth larvae, larvae of Cutworm, sweet potato weevil etc.

Rose is one of the floral host plants recommended for apiary.
Bees drink nectar, however they also need pollen which is their source of protein, and contains nutrients essential for Bees to stay healthy.
As roses produce a lot of pollen and Bees visit the roses especially to collect the pollen. The buzzing of bumble bees can be quite loud as they typically grab hold of the anthers and vibrate their thorax against them to release the pollen.

The process of killing pupa without changing the cocoon shell layer is known as Stifling.
Stifling treatments are applied to silk cocoons to kill the pupae, preventing the emergence of moths and allowing them to preserve the silk during long periods.
All of them involve the application of aggressive steps, such as sun exposure, hot steam from boiling water or hot air, during hours or even days.