Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Ctenidia is found in the order Siphonoptera.
The order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds.
A ctenidium is shaped like a comb or a feather, with a central part from which many filaments or plate-like structures protrude, lined up in a row. It hangs into the mantle cavity and increases the area available for gas exchange.

Corcyra cephalonica is the laboratory host used for the multiplication of egg parasitoids.
In India, the rice moth, Corcyra cephalonica (Stainton), is used as the laboratory host of Trichogramma and other biocontrol agents. Eggs of C. cephalonica were found to be superior to other hosts in the quality of mass-reared parasitoids.
Biological control is a safer and environmentally sustainable method for managing harmful insect pests, entailing the production and distribution of natural enemies in the ecosystem to control insect populations.

The year in which the destructive insect and pest act was enforced in 1914.
Destructive Insects and Pests Act, of 1914 is an act to prevent the introduction into India and the transport from one State to another of any insect, fungus, or another pest, which is or may be destructive to crops.
This Act grants the Central Government may the power to levy and collect such fees at such rates and in such manner as may be specified in the 1914 Act for making an application for a permit to import, or for making inspection, fumigation, disinfection, disinfestations or supervision of, any article.

Bt cabbage is developed against Diamond Back Moth.
Cabbage plants transformed with a synthetic Bt gene, cry1Ab3, were all resistant to larvae of the diamondback moth, whereas all plants transgenic for cryIIa3, a wild-type Bt gene, were susceptible.
The diamondback moth is the most destructive insect pest of brassica crops throughout the world. The moth is most active at night. Economic damage is most severe when heading begins. The caterpillars tunnel into the leaves of the forming heads of cabbages.

Caudal alae is absent in Meloidogyne sp.
Meloidogyne incognita, also known as the southern root-nematode or cotton root-knot nematode is a plant-parasitic roundworm in the family Heteroderidae. It typically incites large, usually irregular galls on roots as a result of parasitism.
Caudal alae are cuticular extensions on either side of or surrounding, the male cloaca and it is not present in meloidogyne spcies.
Females of M. incognita are pear-shaped with no posterior protuberance. Their stylet ranges from 15 - 16 µm long, and knobs are rounded and offset. Perineal pattern is oval to rounded, typically with a high dorsal arch, striae usually wavy, and lateral field absent or weakly demarcated.

Asymmetrical male genitalia is present Grylloblatodea, Embioptera and Zoraptera insect order.
In insects, on the other hand, genital asymmetry is a widespread phenomenon. An aedeagus is a reproductive organ of male arthropods through which they secrete sperm from the testes during copulation with a female.
In some insects the endophallus and the gonopore may be everted through the phallotreme and into the female's bursa copulatrix. Genital lobes referred to as phallomeres form at the sides of the gonopore in the ontogeny of some insects.

In India the first experiment on transgenic plants was done with Brassica.
Brassica napus is an important oilseed crop that offers a considerable amount of biomass for global vegetable oil production.
The establishment of an efficient genetic transformation system with a convenient transgenic-positive screening method is of great importance for gene functional analysis and molecular breeding.

a. Indofil M-45 - Di thiocarbamate.
Indofil M-45 is a contact fungicide of Di thiocarbamate group, which checks the growth of fungi and the spread of diseases. It reduces the activity of enzymes in fungus which in turn reduces the energy production and finally results in death of the fungus.
b. Sulfex is Sulphur.
Sulfex is used as a highly effective fungicide to control powdery mildew on many crops. It also supplies Sulphur (an essential plant nutrient) to plants and no build-up of resistance by either pathogens or mites.
c. Plantomycin is antibiotic.
A stable, free flowing fine powder, fully soluble in water. Broad spectrum, antibiotic bactericide for plants for control of bacterial diseases in plants.
d. Emisan contains Mercury.
It is a mercurial fungicide contains 6% methoxyethyl mercuric chloride. These are potent neurotoxicants.

The pressure of foot sprayer is 17 - 21 kg/sq cm.
The foot sprayer is one of the ideal and versatile sprayers used for multipurpose spraying jobs.
The sprayer consists of a pump operated by the foot lever, suction hose with strainer, delivery hose, spray lance fitted with shut off pistol valve, gooseneck bend and adjustable nozzles.

Muscles that help in lifting the antennae are Levator muscles.
The function of the levator palpebrae superioris muscle is to raise the upper eyelid and to maintain the upper eyelid position.
The levator palpebrae superioris muscle origin is the periosteum of the lesser wing of the sphenoid bone, superior to the optic foramen.