Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

In Periplaneta accessory pulsating organs are present in Base of antennae.
In the dorsal vessel, 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.
They are indispensable in the open circulatory system for hemolymph exchange in antennae, long mouthparts, legs, wings, and abdominal appendages.

The gene transferred from E.coli to tobacco to increase the level of manitol is Manitol carboxylase.

Cypermethrin insecticides are capable of controlling mites.
Cypermethrin (CP) is a synthetic pyrethroid used as an insecticide in large-scale commercial agricultural applications as well as in consumer products for domestic purposes.
It behaves as a fast-acting neurotoxin in insects. It is easily degraded on soil and plants but can be effective for weeks when applied to indoor inert surfaces.

Use of light traps for the management of pests is an example of Biological control.
UV light traps are widely employed to monitor and control flies in bakeries, restaurants and food processing plants, often being placed to help draw insects away from entrances and out of buildings.
The traps also attract and kill flying moths but they are not very effective in reducing storage moth populations.

Red squill is the first rodenticide developed.
Red squill, a rodenticide derived from the bulbs of a lilylike subtropical plant, is slower-acting and less toxic to animals other than rodents because it is removed from the stomach by vomiting a reflex that is absent in rodents.
The powdered bulbs of a Mediterranean plant, red squill, have been widely used as a rat poison, since the toxic action of red squill is relatively specific to rats.

The nematode that feeds on subsurface tissues is Trichodorus.
Trichodorus is a genus of terrestrial root-feeding (stubby-root) nematodes in the Trichodoridae family (trichorids), one of five genera. They are economically important plant parasites and virus vectors.
The genus, which is the largest in the family consists of 54 species. The females are didelphic (two genital tracts) and are distributed worldwide.

Fumigant insecticides includes Methyl bromide, Ethylene dichloride and Chloropicrin.
Fumigants used to treat stored products or nursery stock include hydrogen cyanide, naphthalene, nicotine, and methyl bromide.
Soil fumigants commonly used as nematocides are methyl bromide, dichloropropane, propylene oxide, dibromochloropropane, organophosphate insecticides and chloropicrin.

Leishmaniasis of kala azar disease is caused by Protozoan (Leishmania donovanii and spread by Sand flies.
Leishmaniasis is a parasitic disease that is found in parts of the tropics, subtropics, and southern Europe. Leishmaniasis is caused by infection with Leishmania parasites, which are spread by the bite of infected sand flies.
There are 3 main forms of the disease, Visceral leishmaniasis (VL), also known as kala-azar, is fatal if left untreated in over 95% of cases.

Key pest is an important major pest species in the complex of pests attacking a crop.
A pest is any animal or plants harmful to humans or human concerns. It is any living thing, whether animal, plant, or fungus, that humans consider troublesome to themselves, their possessions, or the environment.
Agricultural and horticultural crops are attacked by a wide variety of pests, the most important being insects, mites, nematodes and gastropod molluscs. The damage they do results both from the direct injury they cause to the plants and from the indirect consequences of the fungal, bacterial, or viral infections they transmit.

The highest chromosomal number is seen in Morus nigra.
Morus nigra, called black mulberry, is a species of flowering plant in the family Moraceae.
It is a deciduous tree growing to 12 metres tall by 15 m broad. The leaves are 10 - 20 centimetres long by 6 - 10 cm broad - up to 23 cm long on vigorous shoots, downy on the underside, and the upper surface rough with very short, stiff hairs.
The black mulberry is known for its large number of chromosomes. It has 308 (44x ploidy) chromosomes.