Horticulture: Vegetable Production MCQs 2026

Which vegetable crop is commonly raised in a nursery before field transplanting

1. A Tomato ✓
2. B Carrot ✓
3. C Radish ✓
4. D Garlic ✓

Trellising is particularly useful for climbing vegetables such as

1. A Potato and carrot ✓
2. B Cucumber and bitter gourd ✓
3. C Onion and garlic ✓
4. D Radish and turnip ✓

The edible structure of a cultivated mushroom is the

1. A Fruiting body ✓
2. B Tap root ✓
3. C True seed ✓
4. D Leaf blade ✓

Curing of onion bulbs is carried out mainly to

1. A Start active root growth ✓
2. B Increase leaf succulence ✓
3. C Convert bulbs into tubers ✓
4. D Dry necks and outer scales for better storage ✓

Seed priming refers to

1. A Burning seed before sowing ✓
2. B Harvesting immature fruits ✓
3. C Controlled pre-sowing hydration of seed ✓
4. D Deep ploughing after harvest ✓

Integrated pest management in vegetables means

1. A Using pesticides at random ✓
2. B Combining compatible control methods ✓
3. C Ignoring monitoring and thresholds ✓
4. D Removing all beneficial insects deliberately ✓

Growing vegetables in nutrient solution without soil is called

1. A Hydroponics ✓
2. B Apiculture ✓
3. C Sericulture ✓
4. D Silviculture ✓

Plant spacing in vegetable crops directly influences

1. A Chromosome number only ✓
2. B Seed coat colour only ✓
3. C Plant population per unit area ✓
4. D Botanical family only ✓

Tomato, brinjal and chilli are collectively called

1. A Cole crops ✓
2. B Root crops ✓
3. C Bulb crops ✓
4. D Solanaceous vegetables ✓

Yellow vein mosaic of okra is mainly transmitted by

1. A Whitefly ✓
2. B Aphid only ✓
3. C Nematode only ✓
4. D Red pumpkin beetle ✓

Leaf curl disease in chilli is commonly spread by

1. A Earthworm ✓
2. B Whitefly ✓
3. C Honey bee ✓
4. D Termite only ✓

Leguminous vegetables improve soil fertility mainly through

1. A Conversion of phosphorus into oxygen ✓
2. B Removal of all organic matter ✓
3. C Rhizobium-assisted nitrogen fixation ✓
4. D Blocking root nodule formation ✓

Staking is especially useful in indeterminate tomato because it

1. A Converts roots into tubers ✓
2. B Stops flowering completely ✓
3. C Replaces all fertilization ✓
4. D Supports vines and keeps fruit off the soil ✓

Seed viability is commonly assessed by measuring

1. A Leaf area index only ✓
2. B Germination percentage ✓
3. C Fruit acidity only ✓
4. D Soil bulk density only ✓

The main advantage of hybrid vegetable seed is

1. A Exploitation of heterosis ✓
2. B Permanent elimination of irrigation ✓
3. C Guaranteed pest immunity ✓
4. D Zero nutrient requirement ✓

Garden pea is generally considered a

1. A Hot desert perennial ✓
2. B Tropical tree vegetable ✓
3. C Warm-season cucurbit ✓
4. D Cool-season vegetable ✓

Bacterial wilt of tomato is commonly caused by

1. A Puccinia graminis ✓
2. B Sclerotinia sclerotiorum ✓
3. C Ralstonia solanacearum ✓
4. D Phytophthora capsici ✓

The edible curd of cauliflower is an

1. A Immature inflorescence ✓
2. B Underground stem tuber ✓
3. C Mature dry seed ✓
4. D Expanded storage root ✓

Processing tomatoes are usually preferred when they have

1. A Very high seed dormancy ✓
2. B High total soluble solids ✓
3. C No red pigment ✓
4. D Extremely watery pulp only ✓

Mulching in vegetable fields mainly helps in

1. A Increasing soil erosion ✓
2. B Preventing all root growth ✓
3. C Making irrigation impossible ✓
4. D Moisture conservation and weed suppression ✓

Cold treatment used to induce flowering in biennial vegetables is called

1. A Etiolation ✓
2. B Desiccation ✓
3. C Vernalization ✓
4. D Scarification ✓

Earthing up in potato production helps to

1. A Induce seedlessness ✓
2. B Cover developing tubers and support plants ✓
3. C Remove all nutrients from soil ✓
4. D Stop stolon formation ✓

Hardening of vegetable seedlings means

1. A Gradually exposing seedlings to field conditions ✓
2. B Keeping seedlings permanently under high humidity ✓
3. C Removing all roots before transplanting ✓
4. D Harvesting seedlings at flowering ✓

Premature flowering in a vegetable crop before useful vegetative growth is called

1. A Blanching ✓
2. B Ratooning ✓
3. C Bolting ✓
4. D Roguing ✓

Most cucurbits bear male and female flowers separately on the same plant, a condition called

1. A Dioecious ✓
2. B Apomictic ✓
3. C Viviparous ✓
4. D Monoecious ✓

Tomatoes for distant markets are often harvested at the

1. A Breaker stage ✓
2. B Fully rotten stage ✓
3. C Dry seed stage ✓
4. D Leaf senescence stage ✓

Ridge and furrow planting is especially common in the cultivation of

1. A Spinach ✓
2. B Potato ✓
3. C Mint ✓
4. D Coriander ✓

The edible part of sweet potato is a

1. A Stem tuber ✓
2. B Corm ✓
3. C Storage root ✓
4. D Bulb scale ✓

The most water-efficient irrigation method for many vegetable crops is

1. A Wild flooding ✓
2. B Unlined basin irrigation ✓
3. C Continuous overhead flooding ✓
4. D Drip irrigation ✓

A fertilizer grade written as 19-19-19 indicates equal percentages of

1. A Calcium, sulfur and zinc ✓
2. B Nitrogen, phosphorus and potassium ✓
3. C Carbon, hydrogen and oxygen ✓
4. D Iron, boron and copper ✓

Crop rotation in vegetable production is mainly useful for

1. A Reducing pest and disease build-up ✓
2. B Keeping one nutrient permanently unchanged ✓
3. C Eliminating all irrigation needs ✓
4. D Preventing pollination ✓

Bitter gourd belongs to the family

1. A Solanaceae ✓
2. B Fabaceae ✓
3. C Apiaceae ✓
4. D Cucurbitaceae ✓

Garlic is commercially propagated by

1. A True botanical seed only ✓
2. B Stem cuttings ✓
3. C Cloves ✓
4. D Runners ✓

Knol-khol is grown mainly for its edible

1. A Swollen stem ✓
2. B Immature flower ✓
3. C Storage root ✓
4. D Leaf blade ✓

The serious insect pest known as brinjal shoot and fruit borer is

1. A Bactrocera dorsalis ✓
2. B Leucinodes orbonalis ✓
3. C Helicoverpa armigera ✓
4. D Plutella xylostella ✓

Garden pea is valuable in rotations because it belongs to

1. A Solanaceae ✓
2. B Malvaceae ✓
3. C Poaceae ✓
4. D Leguminosae or Fabaceae ✓

The edible head of cabbage is mainly a modified

1. A Storage root ✓
2. B Rhizome ✓
3. C Terminal bud ✓
4. D Seed pod ✓

Tomato, brinjal and chilli are members of the family

1. A Cucurbitaceae ✓
2. B Solanaceae ✓
3. C Brassicaceae ✓
4. D Chenopodiaceae ✓

Development of fruit without fertilization is called

1. A Parthenocarpy ✓
2. B Vernalization ✓
3. C Photoperiodism ✓
4. D Stratification ✓

Damping-off in vegetable nurseries is best reduced by

1. A Excessive shade and flooding ✓
2. B Very deep seed placement ✓
3. C Sterile well-drained nursery medium ✓
4. D Delaying all seed treatment ✓

Late blight of potato is caused by

1. A Alternaria brassicae ✓
2. B Ralstonia solanacearum ✓
3. C Fusarium oxysporum ✓
4. D Phytophthora infestans ✓

Blanching in cauliflower production is mainly done to

1. A Keep the curd white and tender ✓
2. B Increase seed dormancy ✓
3. C Promote tuber sprouting ✓
4. D Induce root nodulation ✓

Cucurbit vegetables are usually established in the field by

1. A Grafting only ✓
2. B Direct seeding ✓
3. C Corm planting ✓
4. D Bare-root transplanting only ✓

The plant hormone most closely linked with tomato fruit ripening is

1. A Auxin ✓
2. B Gibberellin ✓
3. C Ethylene ✓
4. D Cytokinin ✓

The pungent principle in chilli fruit is

1. A Citric acid ✓
2. B Allicin ✓
3. C Carotene ✓
4. D Capsaicin ✓

The characteristic pungency of onion is mainly associated with

1. A Capsaicin ✓
2. B Allyl propyl disulfide ✓
3. C Lycopene ✓
4. D Solanine ✓

Carrot is primarily classified as a

1. A Root vegetable ✓
2. B Bulb vegetable ✓
3. C Fruit vegetable ✓
4. D Leafy vegetable ✓

Okra is placed in the botanical family

1. A Apiaceae ✓
2. B Amaryllidaceae ✓
3. C Poaceae ✓
4. D Malvaceae ✓

The edible portion of potato is a

1. A Tap root ✓
2. B Stem tuber ✓
3. C Bulb ✓
4. D Leaf petiole ✓

The botanical family of cole crops such as cabbage and cauliflower is

1. A Solanaceae ✓
2. B Cucurbitaceae ✓
3. C Brassicaceae ✓
4. D Fabaceae ✓