Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Most common inorganic anion in insect blood is Chloride.
Insect "blood" generally does not carry hemoglobin, although hemoglobin may be present in the tracheal system instead and play some role in respiration.
Hemolymph is composed of water, inorganic salts, and organic compounds (mostly carbohydrates, proteins and lipids). The inorganic salts are present in anion and cation form, one of the anions is chloride.

Gronim and Achook are commercial Neem Insecticides on available market.
The most prominent constituent of neem is azadirachtin, which has been established as a pivotal insecticidal ingredient. It acts as an antifeedant, repellent, and repugnant agent and induces sterility in insects by preventing oviposition and interrupting sperm production in males.
The commercial neem insecticides available in market are based on neem seed kernel extract (NSKE). Some products are Gronim, Neemazal, Achook, Nimbecedine. Neem based products are sensitive to UV light i.e. it degrades when exposed to sunlight.

Fruit sucking moths lay eggs on Tinospera cardifolia, Cocculus pendulus, and Cocculus hirsutus.
The fruit-sucking moth is a moth of the family Erebidae. The species was first described by Frederic Moore in 1877.
Larva has pinkish-grey dorsal surface suffused darker to a V-shaped yellow band. It has black spiracles and marbled white-ringed rufous-orange ocellate marks with three ferrous lines crossing them. The adults are a pest on various fruits. They pierce the fruit to suck the juice.

Ovipositor lure used for rice stem borer is Para methyl acetophenone.
Oviposition lures are natural chemical substances that control the selection of sites for oviposition by the adult female. By using these chemicals, adult female insects can be lured to lay an egg in an undesirable place where their larvae will die due to wanting food.
Methylacetophenone is an aromatic ketone. 4'-Methylacetophenone is a natural product found in Cichorium endivia, Myrocarpus frondosus, and other organisms.

The chemical which is used to anaesthetize nematodes is Dichloro-triethyl ether.
This chemical is obsolete as a general anesthetic. It is highly inflammable and therefore incompatible with modern surgical and anesthetic techniques.
It has an unpleasant smell and irritates mucous membranes; this can cause coughing, straining, laryngeal spasm, and hypersalivation.
It is largely supplanted the use of chloroform as a general anesthetic due to ether's more favourable therapeutic index, that is, a greater difference between an effective dose and a potentially toxic dose.

A group of caterpillars is called Army.
The term used for group of caterpillars is called Army.
Caterpillars are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths). Caterpillars are typically voracious feeders and many of them are among the most serious of agricultural pests.

Auto-sexing in silkworms is achieved through Translocation.
Translocation means a location change. It often refers to genetics, when part of a chromosome is transferred to another chromosome. Chromosomes are structures that carry genes, our units of heredity.
In silkworms, the female is the heterogametic sex and has one Z and one W chromosome, whereas the male has two Z chromosomes.

The safest method of disposing off the leftover pesticide is disposal by burying it in the soil.
Left over Pesticides should be disposed of in a safer place like barren isolated area. The used or empty containers should be crushed with stone and buried deep in the soil away from habitation. Wash hands and face with clean water and soap before eating or smoking.

Cochineal insects have proved very useful for Cactus prevention.
Cochineal insects are soft-bodied, flat, oval-shaped scale insects. The females, wingless and about 5 mm (0.20 in) long, cluster on cactus pads.
They penetrate the cactus with their beak-like mouthparts and feed on its juices, remaining immobile unless alarmed. Male nymphs feed on the cactus until they reach sexual maturity.

Centrifugal energy nozzle is used for fogs composed of very fine droplets.
Centrifugal sprayer is a high-speed spinning disc (flat, concave or cage, or perforated cylinder atomizes the spray liquid into fine droplets.
It is used to spray large areas with small quantity of the spray liquid. It is suitable for spraying shade or Orchard trees with droplet sizes 80 - 100 µ. For mosquito control, the droplet size is 50 - 70 µ. Such sprayer is High Concentration, Low Volume and Low Pressure.