Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

"Potato race, tulip race, onion race & daffodil race" refer to Stem & bulb nematode.
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.
It is a migratory endoparasite that has a five-stage lifecycle and the ability to enter into a dormancy stage. D. dipsaci enters through stomata or plant wounds and creates galls or malformations in plant growth.

Mode of action of spiromesifen is inhibitor Lipid biosynthesis.
Spiromesifen is a novel insecticidal/acaricidal compound derived from spirocyclic tetronic acids that act effectively against whiteflies and mites via inhibition of acetyl-CoA-carboxylase, a lipid metabolism enzyme.
It acts on lipid synthesis by inhibiting acetyl CoA carboxylase and causes a significant decrease in total lipids.

Blood gills are found in Chironomids and Trichopterans.
A blood gill is a gill like structure restricted to organs with spacious lumen and poorly developed/absent trachea, found in larvae of aquatic insects.
The functionality of this gill to respiration, and concludes it exists more likely to absorb water.
Thin plates or filaments with a copious tracheal supply and only a very small blood cavity, structures which are typically developed in such insects as Trichoptera.

Example of a primarily wingless insect in Protura is wing buds never develop.
Wingless insects are a subclass of small, agile insects, distinguished from other insects by their lack of wings in the present and their evolutionary histories, like silverfish and firebrats.
Some species lacking wings are members of insect orders that generally do have wings. Some do not grow wings at all, having "lost" the possibility in the remote past. Some have reduced wings that are not useful for flying.

The damaging stage of red hairy caterpiller is Larva.
Amsacta albistriga, the red hairy caterpillar, is a moth of the family Erebidae. It is found in southern India, where it has been recorded feeding on finger millet and sorghum. The wingspan is 40 - 50 mm (1.6 - 2.0 in). The larvae defoliate various crops.
It is the destructive stage of the pest. Larval period lasts for 40 - 50 days. Pupation takes place along field bunds or in moist soil at a depth of 10 - 20 cm where they undergo pupal diapause for about 10 - 12 months.

Long headed flour beetle, Flat grain beetle and Saw toothed grain beetle is a secondary pests of storage.
Flour beetles are secondary pests of all grains and primary pests of flour and other milled products. In grains, embryo or germ portion is preferred. Secondary grain insects feed on broken grain and any powder products left as a result of the broken grain. They construct tunnels as they move through flour and other granular food products.
These secondary pests include the Indian meal moth and a variety of beetle species, such as the sawtoothed grain beetle, cigarette beetle, drugstore beetle, the red flour and confused flour beetles.

The bushy appearance with dead heart in sugarcane at 6^th inter-node is due to Top borer.
Dead heart in sugarcane is a deformed stunted plant of certain crop grasses caused by borer attack on the region immediately behind the growing bud and characterized by bushy blanched distorted growth beyond the damaged area.
Presence of the reddish mid-rib tunnel on the crown leaf indicates top-borer infestation. Larva eats away the growing point and thus slender dead heart is formed.

The newly hatched silk worms are known as Kegs, Ants and Chawaki.
The silkmoth eggs hatch to form larvae or caterpillars, known as silkworms. The young age silkworms are referred as Chawki (India), Kego (hairy silkworms in Japan) and Ants (China).
Chawki means the first two stages of silkworm rearing. chawki is the most crucial period of silkworm rearing that demands optimum temperature and humidity, hygienic conditions, quality tender leaf, good rearing facilities and above all technical skills.

A. Mist spray is a spray type where volume median diameter is 51 - 100 μm or u.
B. Aerosol or fog is a spray type where volume median diameter is 1 - 50 μm or u.
C. Smoke is a spray type where the volume median diameter is 0.01 - 1 μm or u.
D. The volume median diameter of Vapour is greater than 400 μm or u is not correctly matched.

Wing is the lateral extension of Integument.
Insect wings are adult outgrowths of the insect exoskeleton that enable insects to fly. They are found on the second and third thoracic segments, and the two pairs are often referred to as the forewings and hindwings.
Each of the wings consists of a thin membrane supported by a system of veins. The membrane is formed by two layers of integument closely apposed, while the veins are formed where the two layers remain separate.