Free Plant Protection MCQs with Answers

• A. Organo-chlorine group
• B. Pyrethroid group
• C. Organo-phosphate
• D. Carbamate group

Explanation: Malathion and parathion contain phosphorus-based chemical groups, so they are organophosphate insecticides.

• A. Fungi
• B. Gassicls
• C. Nematodes
• D. Bacteria

Explanation: Onion stalk or soft rot is commonly associated with bacterial infection, particularly soft-rot bacteria that break down plant tissue.

• A. Cultural practices and growing resistant varieties
• B. Cultural practices
• C. Fungicides
• D. Can not be controlled

Explanation: Viruses cannot usually be killed inside infected plants with fungicides, so management relies on sanitation and other cultural practices…

• A. High temperature
• B. All the above
• C. Susceptible varieties
• D. High humidity

Explanation: Disease outbreaks are favoured when environmental conditions such as temperature and humidity suit the pathogen and the crop variety is…

• A. Roots
• B. Floral parts
• C. Foliage of plants
• D. ()

Explanation: Powdery mildew typically produces a conspicuous white, flour-like fungal growth on leaves and other green aerial parts, so foliage is the…

• A. Cutworm
• B. Army worm
• C. None of the above
• D. Locust

Explanation: Locusts are highly migratory grasshoppers that travel in swarms and can consume large quantities of crops rapidly.

• A. Osmosis
• B. Symbiosis
• C. Common salism
• D. None of the above

Explanation: Symbiosis refers to a close relationship in which two organisms live together, often with benefit to one or both partners.

• A. Cutworms
• B. Jassids
• C. White fly
• D. Thrips

Explanation: Bemisia tabaci is the scientific name of the whitefly, a sap-sucking insect that can also transmit important plant viruses.

• A. Blights
• B. Smuts
• C. None of the aboveAccess Government Careers
• D. Powdery mildew

Explanation: The order Erysiphales contains the powdery mildew fungi, which produce superficial white powder-like growth on plant surfaces.

• A. Sugarcane
• B. Maize
• C. Wheat
• D. Rice

Explanation: Whip smut is a major fungal disease of sugarcane caused by Sporisorium scitamineum, producing a characteristic black whip-like structure.

• A. Organo-chlorine pesticides
• B. Pyrethroids
• C. Growing resistant varieties
• D. None of the above

Explanation: Viruses cannot usually be killed inside an infected plant with insecticides, so management relies on resistant varieties, healthy planting…

• A. Detoxicant
• B. Anti-poison
• C. Antitode
• D. Anti-pseudo

Explanation: An antidote is a substance used to counteract or neutralize a poison, including certain pesticide poisonings.

• A. Insects
• B. Rodents
• C. Human beings
• D. Protozon

Explanation: Insects are cold-blooded, or ectothermic, because their body temperature largely follows the surrounding environment.

• A. Grub
• B. Maggot
• C. Cocoon
• D. Worm

Explanation: The larva of a fly is called a maggot, typically a legless, soft-bodied larva.

• A. Head, abdomen and tail
• B. Head, thorax and tail
• C. None of the above
• D. Head, thorax and abdomen

Explanation: An insect’s body is divided into three tagmata: head for sensing and feeding, thorax for locomotion, and abdomen for most internal organs…

• A. 11 segments
• B. 12 segments
• C. None
• D. 20 segments

Explanation: The standard insect body plan has 20 segments: 6 in the head, 3 in the thorax and 11 in the abdomen, although some abdominal segments may…

• A. Dorsal Vessel
• B. Vena Cava
• C. Spiracles
• D. None of the above

Explanation: The dorsal vessel is a tube along the insect’s dorsal side, with its posterior part functioning as the heart and its anterior part as the…

• A. Silk
• B. Cocoon
• C. Typhoon
• D. None of the above

Explanation: A cocoon is the protective silk covering spun around the pupa by the silkworm larva.

• A. Sucking type insects
• B. None of the above
• C. Jumping type insects
• D. Chewing type insects

Explanation: Cockroaches, cutworms, grasshoppers and borers possess chewing or biting mouthparts that remove plant tissue.

• A. Fruit and stem borers
• B. Leaf minors
• C. Jassids and thrips
• D. Whitefly

Explanation: Granular insecticides are commonly placed in soil or plant whorls, where they reach concealed fruit and stem borers.