Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Nodus wing is present in the order Odonata.
Odonata is an order of flying insects that includes the dragonflies and damselflies.
Odonata and their ancestors come from one of the oldest winged insect groups. The smallest living dragonfly is Nannophya pygmaea from east Asia, with a body length of 15 mm and a wing span of 20 mm. The smallest damselflies are species of the genus Agriocnemis with a wing span of only 17 - 18 mm.

In insect nervous system Ingluvial ganglia control the peristaltic movement.
The ingluvial ganglion, a major component of the stomatogastric nervous system, is known to innervate the foregut and anterior midgut.
Ganglion performs many different functions and forms very suitable material for analysis of the interplay between nervous and endocrine functions.
A ganglion is a dense mass of nerve cells that are used to control muscles or process input from the insect's senses. The subesophageal ganglion is located in an insect's head capsule and positioned below the oesophagus.

Indundative release is associated with Biological control.
The release of overwhelming numbers of a mass-produced biological control agent in the expectation of achieving a rapid reduction of a pest population without necessarily achieving continuing impact.
Inundative biological control involves the massive production and release of natural enemies to control the pest quickly.

The light producing substance in Glow worms/fireflies is Luciferin.
Luciferin is the compound that produces light. In a chemical reaction, luciferin is called the substrate.
The bioluminescent color (yellow in fireflies, greenish in lanternfish) is a result of the arrangement of luciferin molecules. Some bioluminescent organisms produce (synthesize) luciferin on their own.

Chewing and biting types of mouth parts are found in Bettle.
This type of mouth parts is found in cockroaches, grasshoppers, locusts, termites, wasps, book and bird lice, earwigs, dragonflies and another large number of insects.
On the dorsal side there is an upper lip called labrum, which is attached to the base with the clypeus of the face.

The host plant of locusts is Polyphagous.
Polyphagous pests are primarily agricultural pests that feed on economically important agricultural and horticultural crops of wide taxonomic diversity across the globe. They cause immense damage across different crop varieties owing to their generalist and voracious food habits.
Locust is a polyphagous pest with and wide host range. The nymphs and adults feed on berseem, maize, sorghum, bajra, rice, date palm, banana trees, sugarcane fodder crops, grasses, etc.

Sorghum shoot fly lays an egg on lower surface of the leaf blades.
Eggs of shoot fly are cigarette shape, white coloured laid generally singly parallel to the midrib on the undersurface of the 3^rd to 5^th leaf.
Under high shoot-fly pressure, there may be several eggs on the same leaf. Sometimes, as many as 25 eggs may be laid on the same seedling.

Chlorpyriphos pesticide is suitable for controlling the white grub.
The most effective insecticides are chlorpyriphos or phorate and are recommended for soil application against neonate tiny grubs.
The older grubs are hard to control as they move deep into the soil, and the insecticides usually do not penetrate the soil well enough to kill the grubs.

Emmelocera depresella attack on the roots of sugarcane is not among the given options.
Emmelocera depresella is the only species of borer infesting the underground portion of sugarcane and, hence, referred to by its common name root borer or rootstock borer.
Root borer is a major sugarcane pest that occurs in some parts of India and Pakistan. It infests sugarcane at all development stages. Infested crops suffer dead hearts and a general yellowing of the leaves.

Phase polymorphism is shown by Grasshoppers.
Polymorphism is a discontinuous genetic variation resulting in the occurrence of several different forms or types of individuals among the members of a single species. A discontinuous genetic variation divides the individuals of a population into two or more sharply distinct forms.
The steppe grasshopper occurs in four distinct colour morphs that differ in the distribution of green across the dorsal and lateral sides of the body: uniform brown, dorsal green, lateral green, and uniform green. Colour and pattern polymorphism occurs in both sexes.