Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

The scientific name of sorghum aphid is Melanaphis sacchari and Hysteraneura setariae.
Melanaphis sacchari and Hysteroneura setariae are aphids in the superfamily Aphidoidea in the order Hemiptera. It is a true bug and sucks sap from plants. It is mostly found in Saccharum and Sorghum species.
These aphids usually are found in the whorls and on the tops of newly emerged leaves of sorghum plants.

The pheromone trap attracts neither female bugs, caterpillars, or female moths.
A pheromone trap is a type of insect trap that uses pheromones to lure insects. Pheromone traps are used both to count insect populations by sampling and to trap pests such as clothes moths to destroy them.
Pheromone traps are very sensitive, meaning they attract insects present at very low densities. They are often used to detect the presence of exotic pests, for sampling, monitoring, or to determine the first appearance of a pest in an area.

Bad odour feeding symptom in flour is due to Cockroach.
Heavy infestation causes a stinking odour in flour, adversely affecting the dough quality. It is an important pest for mill machinery. The flour attracts the roaches.

The last segment in the abdomen of the male cockroach in addition to cerci will have a pair of Anal styles.
The body is divided into a thorax of three segments and a ten-segmented abdomen. The abdomen has ten segments, each having a pair of spiracles for respiration. In addition to the spiracles, the final segment consists of a pair of cerci, a pair of anal styles, the anus and the external genitalia.

Shoot flies belong to the family Anthomyidae.
The Anthomyiidae are a large and diverse family of Muscoidea flies. Most look rather like small houseflies but are commonly drab grey.
Shoot fly has emerged as an important and regular pest of wheat crops since the adoption of semi-dwarf varieties. The fly is about about 3 mm in body length and dark grey.
The newly hatched maggots creep into the leaf sheaths of the tillers and cut the central growing shoots causing dead hearts. In case of severe infestation the plant assumes a bushy appearance with a large number of tillers.

Oil beetles belong to the family Meloidae.
Meloidae is the family of beetles, so called for their defensive secretion of a blistering agent, cantharidin. About 7,500 species are known worldwide.
Oil beetles are a precious and declining group of five beetles that live in calcareous grasslands, dunes, heaths and woodlands. They are a member of the wider 'blister beetle' family, Meloidae. They are so-called because they squirt irritating oily droplets from their joints when alarmed.

The entire thorax with all its appendages is called as Stethidium.
The thorax is the midsection (tagma) of the hexapod body (insects and entognathans). It holds the head, legs, wings and abdomen. It is also called mesosoma or cephalothorax in other arthropods. The body is divided into a thorax of three segments and a ten-segmented abdomen.

Pepper ring spot disease is transmitted by Paratrichodorus minor species of nematode.
These are spread by aphids, and some are spread by seed or mechanically. Symptoms of viruses include mosaic patterns on leaves, leaf curling, fruit distortion, overall stunting of the plant, or death.
Pepper ringspot virus (PepRSV) becomes radially arranged around mitochondria, which are often distorted, and in cells infected with some TRV isolates, "X-bodies" largely composed of abnormal mitochondria and containing small aggregates of virus particles may be produced.

Serratia marcesens is Non-spore forming bacterium that is red-pigmented.
Serratia marcescens is a species of rod-shaped, Gram-negative bacteria in the family Yersiniaceae. It is a facultative anaerobe and an opportunistic pathogen in humans.
Because of its red pigmentation, caused by the expression of the dye prodigiosin and its ability to grow on bread, S. marcescens has been evoked as a naturalistic explanation of medieval accounts of the "miraculous" appearance of blood on the Corporal of Bolsena.
S. marcescens was discovered in 1819 by Venetian pharmacist Bartolomeo Bizio, as the cause of an episode of blood-red discoloration of polenta in the city of Padua.

Juvenile hormone (JH) is a terpene secreted by Corpora allata.
Juvenile hormones (JHs) are a group of acyclic sesquiterpenoids that regulate many aspects of insect physiology. The first discovery of a JH was by Vincent Wigglesworth. JHs regulate development, reproduction, diapause, and polyphenisms.
Juvenile hormones are secreted by a pair of endocrine glands behind the brain called the corpora allata. JHs are also important for the production of eggs in female insects.
JH secretion by the corpus allatum is regulated by two neurohormones, the allatotropins that stimulate the secretion and the allatostatins that inhibit synthesis.