Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

"Z" disc layer in insects found in Muscles.
Z-discs delineate the lateral borders of sarcomeres and are the smallest functional units in striated muscle. The z-line appears in between the I-bands as a dark line that anchors the actin myofilaments.
The core of a Z-disc consists of actin filaments coming from adjacent sarcomeres which are crosslinked by α actinin molecules.

The causative agent of malaria fever in man is Plasmodium sp.
Malaria is caused by a single-celled parasite of the genus Plasmodium. The parasite is transmitted to humans most commonly through mosquito bites.
It is caused by Plasmodium parasites. Four Plasmodium species (Plasmodium falciparum, Plasmodium vivax, Plasmodium ovale and Plasmodium malariae) give disease in humans, and humans are their only relevant reservoir. Transmission requires an intermediate mosquito (anopheles) host.

The pebrine disease of the silkworm is caused by Protozoa.
The pebrine disease is locally known as phootuka “Saiutha” (spotted) in Assamese and is caused by the protozoan parasite Nosema bombycis (Nosema sp.) of the family Nosematidae.
Nosema parasite invades all the tissues of the body of the embryo, larva, pupa and moth.

Tympanum is present in labial palpi of Sphingidae insect.
The Sphingidae are a family of moths called sphinx moths, also colloquially known as hawk moths, with many of their caterpillars known as “hornworms”; it includes about 1,450 species.
Specialized hearing organs, known as tympanal organs, have evolved in at least seven different orders of insects. Tympanal organs are usually defined by the presence of a tympanal membrane. They are backed by an air-filled space or cavity and are innervated by a chordotonal sensory organ.

Nosema disease of bees is caused by Protozoa.
Nosema is a serious disease of adult European honey bees including queen bees. In some years, nosema may cause serious losses of adult bees and colonies in autumn and spring.
The disease is caused by the spore-forming microsporidian, Nosema apis. Spores of this organism can only be seen using a light microscope.

The granular insecticide is having a long residual effect is Aldicarb.
Aldicarb is a carbamate insecticide which is the active substance in the pesticide Temik. Aldicarb was first synthesized in 1965 by Payne and Weiden, and was sold on the market for the first time in 1970.
Aldicarb is a cholinesterase inhibitor that prevents the breakdown of acetylcholine in the synapse. Aldicarb is effective where resistance to organophosphate insecticides has developed. It is effective against thrips, aphids, spider mites, lygus, fleahoppers, and leafminers, but is primarily used as a nematicide.

Ditylenchus members induce 'spikkels' in Narcissus crop.
Ditylenchus dipsaci is a plant pathogenic nematode that primarily infects onion and garlic. It is commonly known as the stem nematode, the stem and bulb eelworm, or onion bloat.
Symptoms of infection include stunted growth, discoloration of bulbs, and swollen stems. D. dipsaci is a migratory endoparasite that has a five-stage lifecycle and the ability to enter into a dormancy stage.
Infected plants show characteristic symptoms including stunted growth, yellow spots, leaf curl, and foliage lesions. Stems often have swollen regions called “spikkles.” As adult nematodes migrate into the scales of the bulb, and the scales become soft, grey, and loosely packed.

Bagging of anar fruits with polythene cover is done to avoid damage from Butterfly sucking moths.
It is widely distributed all over India and is found wherever pomegranates are grown. It is a polyphagous pest having a very wide range of host plants, including, aonla, apple, ber, citrus, guava, litchi, loquat, mulberry, peach, pear, plum, pomegranate, sapota and tamarind.
Before maturity, bagging the fruits with butter paper is good management for this pest.

A. The trade name of Phosphomidon is Dimecron.
Phosphamidon is an organophosphate insecticide first reported in 1960. It acts as a cholinesterase inhibitor. The commercial product typically exists as a mixture of 70% (Z)-isomer and 30% (E)-isomer.
B. The trade name of Aldicarb is Temik.
Aldicarb is a carbamate insecticide which is the active substance in the pesticide Temik. It is effective against thrips, aphids, spider mites, lygus, fleahoppers, and leafminers, but is primarily used as a nematicide.
C. The trade name of Carbofuran is Furadan.
Carbofuran is a carbamate pesticide, widely used around the world to control insects on a wide variety of field crops, including potatoes, corn and soybeans. It is marketed under the trade names Furadan, by FMC Corporation and Curaterr.
D. Carbaryl ⇔ Celphos is not correctly matched.
Carbaryl is a chemical in the carbamate family used chiefly as an insecticide. It is a white crystalline solid previously sold under the brand name Sevin, which was a trademark of the Bayer Company.

Extra oral digestion is found in Antlion grub, Blowfly larvae and Carnivorous hemipterans.
Extra-oral digestion means that spiders can break down the nutrients of captured prey outside their own body. Accordingly, they can both digest large amounts of tissues and separate indigestible parts, such as the exoskeleton of the prey, before they ingest it.
Extraoral digestion allows for breakdown of dietary components before they reach the midgut for final enzymatic degradation and absorption.
In the Hemiptera, this is achieved by the secretion of enzyme-rich fluids from the salivary gland, with the combination of protein and mRNA from these tissues termed the sialome.