All Free Agriculture MCQs with Answers

• A. Chewing
• B. Siphoning
• C. Sucking
• D. Biting

Explanation: Sugarcane pyrilla is a sap-sucking leafhopper, so its piercing-sucking mouthparts remove plant sap from the leaves.

• A. Jethrotull
• B. Simonson
• C. Norman Borlog
• D. None of the above

Explanation: Jethro Tull is commonly credited in elementary agriculture references as an early pioneer or father of weed science because of his work on…

• A. Chemical control
• B. Genetic control
• C. both A & B
• D. None of these

Explanation: Releasing sterile or genetically incompatible individuals reduces successful reproduction in the pest population, so it is a form of…

• A. Pest outbreak
• B. Pest resugrgence
• C. IPM
• D. IPC

Explanation: Integrated pest management combines compatible biological, cultural, mechanical and chemical methods to keep pests below the economic…

• A. Chemical control
• B. Natural control
• C. Artificial control
• D. Impossible to control

Explanation: Artificial control consists of human-applied practices, such as chemical, mechanical, biological, or cultural measures, used to keep pests…

• A. both A & B
• B. Migrant pest & potential pest
• C. Major pest & Minor pest
• D. None of the above

Explanation: Insect pests may be grouped by importance as major or minor pests and by occurrence or behaviour as migrant or potential pests.

• A. An 'upper lip' (labrum), lower (ventral) surface of which forms the epipharynx
• B. All of these
• C. The paired maxillae and a 'lower lip' (labium).
• D. a tongue-like hypopharynx; the jaws (mandibles)

Explanation: The standard insect mouthpart plan includes the labrum and epipharynx, hypopharynx and mandibles, paired maxillae, and labium.

• A. Six- layered skin (cuticle)
• B. Two-layered skin (cuticle)
• C. three-layered skin (cuticle)
• D. None of the above

Explanation: Insect cuticle is commonly described as having three layers: epicuticle, exocuticle, and endocuticle, although their thickness and…

• A. Competetion
• B. Ammensalism
• C. This statement is wrong
• D. Commensalism

Explanation: Commensalism is an association in which one microorganism benefits while the other is neither helped nor harmed.

• A. Fern leaf
• B. Little leaf
• C. Mottle leaf
• D. None of these

Explanation: Zinc deficiency in cotton produces small, narrow leaves and is therefore called little leaf.

• A. Bacterial & fungal disease
• B. Viral disease
• C. Physiological disease
• D. The above statement is wrong

Explanation: Browning disease, also called bronzing in rice, is a physiological disorder associated with nutrient or toxic-element imbalance rather…

• A. Bacteroid
• B. All of these
• C. Bacterin
• D. Bacteriophage

Explanation: A bacteriophage is a virus that infects and replicates inside bacterial cells.

• A. Oxidation
• B. Reduction
• C. Both a & b
• D. Dehydration

Explanation: An antioxidant slows oxidation by reacting with oxidizing agents or free radicals before they damage the protected material.

• A. Cloudy weather
• B. High humidity
• C. All the above
• D. Low temperature

Explanation: Cloudy weather, high humidity and low temperatures can keep plant surfaces wet and slow drying, creating conditions favourable for many…

• A. Mango
• B. Guava
• C. Datepalm
• D. Citrus

Explanation: Gummosis, marked by gum exudation from the bark or trunk, is a well-known disease problem of citrus trees.

• A. Apple
• B. Peach
• C. Pear
• D. Grapes

Explanation: The codling moth is a major pest of apple, particularly because its larvae bore into the fruit and damage the core and seeds.

• A. Virus
• B. Bacteria
• C. Fungi
• D. Nematode

Explanation: Citrus canker is caused by the bacterium Xanthomonas citri. It produces raised, corky lesions on citrus leaves, twigs and fruits, unlike…

• A. Fungal disease
• B. Bacterial disease
• C. Viral disease
• D. Nematode disease

Explanation: Banana bunchy top is caused by Banana bunchy top virus and is commonly spread by the banana aphid.

• A. New organ
• B. Zygote
• C. Gastrula
• D. Cancer

Explanation: Uncontrolled or abnormal mitotic division can produce a mass of cells with unchecked growth, which may develop into cancer.

• A. Rapseed/mustard
• B. Oat
• C. Tomato
• D. Barley

Explanation: Argemone mexicana, or Mexican poppy, is a serious contaminant and weed of rapeseed and mustard fields.