Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Vulval cone is a specific characteristic of Heterodera sp. Nematode.
Heterodera is a genus of nematodes in the family of Heteroderidae. Members of the genus are obligate parasites and different species attack different crops, often causing great economic damage.
The genus is unique among nematode genera because of the ability of the female to transform into a tough, brown, cyst that protects the eggs which have been formed within her body.
Based on cyst morphology and characteristics of the vulval cone, species of Heterodera are placed into six groups that are Avenae, Cyperi, Schachtii, Sacchari, Goettingiana and Humuli.

Zygentomata is known as fish moth.
Zygentoma is an order in the class Insecta, and consists of about 550 known species. The Zygentoma include the so-called silverfish or fishmoths, and the firebrats.
The name "Zygentoma" is derived from the Greek (zygon), in context meaning "yoke" or "bridge"; and (entoma), "insects", literally "cut into" because of the segmented anatomy of typical insects.
Silverfish are so-called because of the silvery glitter of the scales covering the bodies of the most conspicuous species. Their movement has been described as "fish-like" as if they were swimming.

1^st plant protection advisor to the Govt. of India was H. S. Pruthi.
He was a plant protection advisor to the Government of India and helped establish a locust warning system. He retired in 1953.
In 1963 he published a Textbook on Agricultural Entomology. Several genera of hemipterans have been named after him including Pruthiana, Pruthiorosius and Pruthius.

Oviscapt is present in Housefly.
In the house fly the terminal abdominal segments are telescopic and these telescopic segments aid in oviposition. The ovipositor of house fly is called pseudoovipositor or ovitubus or oviscapt.
Oviscapt pouches and epandrial posterior lobes were outlined and the area of their black duplicates was measured.

The most widely used bacterium in insect control is Bacillus thuringiensis.
Bacillus thuringiensis (Bt) is a unique bacterium in that it shares a common place with several chemical compounds which are used commercially to control insects important to agriculture and public health.
Although other bacteria, including B. popilliae and B. sphaericus, are used as microbial insecticides, their spectrum of insecticidal activity is quite limited compared to Bt.

In Lepidoptera accessory pulsating organs are present in wings.
In addition to the dorsal vessel ("heart"), insects have accessory pulsatile organs ("auxiliary hearts") that supply body appendages with hemolymph.
They are indispensable in the open circulatory system for hemolymph exchange in antennae, long mouthparts, legs, wings, and abdominal appendages.

Leaf extracts of congress grass (Active principle is parthenin) have the pesticide properties.
Parthenium hysterophorus is a species of flowering plant in the family Asteraceae. It is native to the American tropics. The plant causes dermatitis and respiratory malfunction in humans, and dermatitis in cattle and domestic animals. The main substance responsible is parthenin, which is dangerously toxic.
The plant causes dermatitis and respiratory malfunction in humans, and dermatitis in cattle and domestic animals. The main substance responsible is parthenin, which is dangerously toxic.

Calcified cocoons are the ones that have been destroyed by Fungus.
The bowel loop is encased by thickened or calcified peritoneal. The membrane results in a cocoon-like sac formation in the abdomen.

In India more honey is obtained from Rock bees.
A rock honeybee) is a eusocial flying insect within the genus Apis of the bee clade, all native to mainland Afro-Eurasia.
One of its subspecies, the Indian honey bee (A. c. indica), was domesticated and kept in hives in a fashion similar to A. mellifera, though on a more limited, regional scale.
The Apis Mellifera is the most common bee species in the world, and the most extensively farmed 75% of honey produced in India comes from them.