Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Koshi disease of citrus is caused by Dialeurodes citri.
Citrus greening is spread by a disease-infected insect, the Asian citrus psyllid, and has put the future of America's citrus at risk.
Infected trees produce fruits that are green, misshapen and bitter, unsuitable for sale as fresh fruit or for juice.

Chirkey disease of cardamom is transmitted by Corn aphids.
Chirke is caused by Large Cardamom Chirke Virus, a new virus species under the genus Macluravirus, family Potyviridae and is characterized by mosaic with pale streak on the leaves. The streaks turn pale brown resulting in drying, withering of leaves and finally death of the plants.
The chirke disease is transmitted by mechanical sap inoculation and also by aphid, Ropalosiphum maidis Fitch. The cultivar Kopringe is resistant to chirke.

Example of an exopterygote insect order with a pupal instar in its life cycle is Thysanoptera.
The Exopterygota is a highly diverse insect superorder, with at least 1,30,000 living species divided between 15 orders.
Thrips (order Thysanoptera) are minute (mostly 1 mm (0.039 in) long or less), slender insects with fringed wings and unique asymmetrical mouthparts. They have characteristic tube-shaped apical abdominal segments, egg-laying atop the surface of leaves, and three "pupal" stages.

Malpighian tubules produce an iso-osmotic filtrate that is High in K⁺ and low in Na⁺.
Malpighian tubules are slender tubes normally found in the posterior regions of arthropod alimentary canals.
Pre-urine is formed in the tubules, when nitrogenous waste and electrolytes are transported through the tubule walls. Uric acid precipitates out, and sodium and potassium ions are actively absorbed by the rectum, along with water via osmosis. Uric acid is left to mix with feces, which are then excreted.

An insect diet composed of crude organic material is called an Oligidic.
Oligidic diets contain crude natural ingredients.
Lots of insects eat plants, some insects eat other insects, and some even drink blood. Many insects eat nectar from plants. And some insects will eat whatever scraps of food you leave lying around.

The integument comprises of Cuticle, epidermis and basement.
The integument consists of the underlying basement membrane, the living epidermal cell layer, and the overlying, nonliving cuticle that is secreted by the epidermis.
It describes the integumentary systems in insects, their chemical composition, and their role in insect physiology.

A. Potato tuber moth ⇔ Grubs. It is not correctly matched.
Phthorimaea operculella, also known as the potato tuber moth or tobacco splitworm, is a moth of the family Gelechiidae. It is an oligophagous insect that feeds on the plant family Solanaceae and is especially known for being a major pest of potato crops.
B. Rice weevil ⇔ Grubs and adults
The rice weevil (Sitophilus oryzae) is a stored product pest that attacks seeds of several crops, including wheat, rice, and maize. The damaging stage of rice weevil is grub and adult.
C. Pulse beetles ⇔ Grubs
This beetle is a common pest targeting many different species of stored legumes and it is distributed across tropical and subtropical regions. Grubs are the damging stage of pulse beetle.
D. Lesser grain borer ⇔ Grubs and adults
It is a beetle commonly found within store bought products and pest of stored cereal grains located worldwide. It is also a major pest of peanuts. It feeds on the whole grain in both grub and adult stages.

Neurotransmitter that stimulates adepokinetic hormone secretion is Octopamine.
Octopamine is highly concentrated in neurones of several invertebrate species. Unlike in mammals, octopaminergic neurones in invertebrates are spatially separated from catecholaminergic neurons.
Adipokinetic hormones (AKHs) are metabolic neuropeptides, mediating mobilization of energy substrates in many insects.

Adhesive or gluey substance is produced from Accessory glands.
The insect male accessory gland (MAG) is an internal reproductive organ responsible for the synthesis and secretion of seminal fluid components, which play a pivotal role in the male reproductive strategy. In many species of insects, the effective ejaculation of the MAG products is essential for male reproduction.
Adhesive, also known as glue, cement, mucilage, or paste, is any non-metallic substance applied to one or both surfaces of two separate items that binds them together and resists their separation.