Field Crop Production: Cotton, Sugarcane and Oilseeds MCQs 2026

Cotton leaf curl virus is mainly transmitted by

1. AHoneybee✓
2. BEarthworm✓
3. CFruit fly✓
4. DWhitefly✓

In cotton terminology, a square refers to a

1. AFlower bud✓
2. BMature open boll✓
3. CGinned seed✓
4. DRoot nodule✓

Cotton belongs to the botanical family

1. AMalvaceae✓
2. BPoaceae✓
3. CFabaceae✓
4. DSolanaceae✓

The most widely cultivated upland cotton species is

1. AGossypium barbadense✓
2. BGossypium arboreum✓
3. CGossypium hirsutum✓
4. DHibiscus esculentus✓

The economic fibre of cotton develops from

1. ARoot hairs of the taproot✓
2. BEpidermal hairs of the seed coat✓
3. CStem pith cells✓
4. DLeaf mesophyll cells✓

In Pakistan, cotton is grown mainly as a

1. ARabi crop✓
2. BWinter fodder only✓
3. CPerennial orchard crop✓
4. DKharif crop✓

Jassid injury in cotton commonly causes

1. AUnderground pod formation✓
2. BRed rot in stalks✓
3. CLeaf yellowing, curling and hopper burn symptoms✓
4. DSterile tassels✓

Pink bollworm in cotton chiefly damages

1. AOnly roots of seedlings✓
2. BBolls and developing seeds✓
3. CRice panicles✓
4. DSugarcane leaves only✓

Mealybug in cotton damages plants mainly by

1. ASucking sap and producing honeydew✓
2. BCutting stems at soil level✓
3. CChewing stored lint only✓
4. DCausing bacterial blight directly✓

Cotton picking should preferably be done when bolls are

1. AGreen and unopened✓
2. BSubmerged in irrigation water✓
3. CStill at seedling stage✓
4. DFully open and dry✓

Ginning is the process of separating

1. AJuice from cane✓
2. BLint from seed✓
3. COil from mustard cake✓
4. DPollen from tassels✓

Seed cotton before ginning is commonly called

1. AGur✓
2. BBagasse✓
3. CKapas✓
4. DPress mud✓

Cotton generally performs best on

1. AWell-drained loam to silt loam soils✓
2. BWaterlogged saline ponds✓
3. CPure gravel without nutrients✓
4. DPermanent marsh only✓

Excess nitrogen in cotton often causes

1. AImmediate lint drying in field✓
2. BRank vegetative growth and delayed maturity✓
3. CComplete immunity to insects✓
4. DNo leaf growth✓

The fruiting form that appears before flower and boll in cotton is the

1. ATiller✓
2. BPanicle✓
3. CSett✓
4. DSquare✓

Square and boll shedding in cotton is commonly increased by

1. ABalanced irrigation only✓
2. BTimely picking only✓
3. CWater stress and insect attack✓
4. DProper seed delinting only✓

Defoliation before mechanical cotton picking is done to

1. ARemove leaves and reduce trash in seed cotton✓
2. BIncrease seed dormancy✓
3. CConvert cotton into sugarcane✓
4. DStop boll opening permanently✓

An important basis of cotton integrated pest management is

1. ASpraying by calendar only without observation✓
2. BRegular scouting and economic threshold levels✓
3. CUsing only one insecticide for the season✓
4. DIgnoring beneficial insects✓

Staple length in cotton refers to

1. ADiameter of cane stalk✓
2. BOil percentage in seed✓
3. CAverage length of lint fibre✓
4. DNumber of sugarcane buds✓

Sugarcane belongs to the family

1. AMalvaceae✓
2. BBrassicaceae✓
3. CAsteraceae✓
4. DPoaceae✓

Commercial sugarcane is propagated mainly by

1. AStem cuttings called setts✓
2. BTrue botanical seed only✓
3. CLeaf cuttings only✓
4. DRoot nodules✓

A good sugarcane sett usually contains

1. ANo buds at all✓
2. BTwo to three healthy buds✓
3. COnly leaves and trash✓
4. DOnly roots without stem✓

Ratooning in sugarcane means

1. ARaising seedlings in a rice nursery✓
2. BRemoval of lint from seed✓
3. CRegrowth from stubble after harvest✓
4. DExtraction of oil from seed✓

Sugarcane is generally considered a

1. ALong-duration crop✓
2. BOne-week vegetable crop✓
3. CShort nursery herb only✓
4. DDry storage grain only✓

The major recoverable sugar in sugarcane is stored mainly in the

1. ALeaf hairs✓
2. BFlower petals✓
3. CRoot nodules✓
4. DStalk internodes✓

Brix in sugarcane juice is a measure of

1. ASeed germination only✓
2. BTotal soluble solids✓
3. CSoil pH only✓
4. DLeaf area index only✓

The ripening phase of sugarcane is marked by

1. AOnly vegetative sprouting✓
2. BLint elongation✓
3. CSucrose accumulation in the stalk✓
4. DPod formation underground✓

Earthing up in sugarcane is practiced to

1. ASupport canes and cover the root zone✓
2. BSeparate lint from seed✓
3. CInduce rice tillering✓
4. DRemove sugar from juice✓

Trash mulching in sugarcane helps mainly to

1. AIncrease soil erosion✓
2. BConserve soil moisture and suppress weeds✓
3. CDestroy all buds on setts✓
4. DLower organic matter permanently✓

Red rot of sugarcane is caused by

1. APuccinia triticina✓
2. BXanthomonas citri✓
3. CAlternaria solani✓
4. DColletotrichum falcatum✓

Pyrilla is an important sugarcane pest that mainly

1. ABores into cotton bolls only✓
2. BEats stored wheat grain✓
3. CSucks sap from leaves✓
4. DDamages mustard flowers only✓

Top borer in sugarcane can produce the symptom known as

1. ADead heart✓
2. BHopper burn in rice only✓
3. CBunchy top in banana only✓
4. DGreen ear in bajra only✓

Sugar recovery is improved when cane is harvested at

1. AVery early sprouting stage✓
2. BProper maturity with high sucrose content✓
3. CComplete drying after burning for months✓
4. DThe nursery seedling stage✓

Sugarcane is a heavy feeder especially of

1. AOnly chlorine gas✓
2. BNo nutrients at all✓
3. COnly sodium chloride✓
4. DNitrogen and potassium✓

Waterlogging in sugarcane mainly reduces yield by

1. ARestricting aeration and root activity✓
2. BIncreasing oxygen in roots excessively✓
3. CImproving all soil microbes equally✓
4. DStopping all weed growth permanently✓

Canola differs from traditional rapeseed mainly because it has

1. ANo oil in the seed✓
2. BOnly blue flowers✓
3. CLow erucic acid and low glucosinolates✓
4. DUnderground bolls✓

Rapeseed and mustard belong to the family

1. APoaceae✓
2. BBrassicaceae✓
3. CMalvaceae✓
4. DCucurbitaceae✓

The sun-following movement of young sunflower heads is called

1. AGeotropism✓
2. BHydrotropism✓
3. CThigmotropism✓
4. DHeliotropism✓

The inflorescence of sunflower is a

1. ACapitulum or head✓
2. BSpike✓
3. CCob✓
4. DUmbel✓

Groundnut is distinctive among oilseeds because its pods develop

1. AOn the tassel✓
2. BUnderground after pegging✓
3. CInside cane internodes✓
4. DOn rice panicles✓

Sesame is comparatively valued in dry areas because it is

1. AA permanent aquatic crop✓
2. BUnable to grow in warm weather✓
3. CDrought tolerant✓
4. DA fibre crop only✓

The botanical name of linseed is

1. AHelianthus annuus✓
2. BSesamum indicum✓
3. CArachis hypogaea✓
4. DLinum usitatissimum✓

Safflower is relatively tolerant to

1. ADrought and salinity✓
2. BPermanent flooding only✓
3. CHeavy shade only✓
4. DSevere frost at flowering✓

Rapeseed-mustard is mainly grown in Pakistan as a

1. AKharif paddy crop✓
2. BRabi oilseed crop✓
3. CPerennial fibre crop✓
4. DSummer sugar crop only✓

Sunflower oil is generally rich in

1. ACane sucrose only✓
2. BCotton lint fibre✓
3. CUnsaturated fatty acids✓
4. DStarch granules only✓

Oilseed cake left after oil extraction is commonly used as

1. ASeed cotton for ginning✓
2. BCane planting sett✓
3. CRice nursery soil only✓
4. DAnimal feed✓

Alternaria blight is an important disease of

1. ARapeseed and mustard✓
2. BSugarcane setts only✓
3. CCotton lint in storage only✓
4. DMaize silks only✓

Aphid is a common sucking pest of mustard that damages by

1. ASeparating lint from seed✓
2. BCutting cane at harvest only✓
3. CProducing sucrose in stalks✓
4. DSucking plant sap and excreting honeydew✓

Timely sowing of oilseed crops mainly helps by

1. AEliminating the need for seed✓
2. BTurning oilseed crops into cereals✓
3. CImproving establishment and escaping terminal heat stress✓
4. DPreventing flowering permanently✓

Bt cotton primarily provides protection against

1. ATermites only✓
2. BBollworms✓
3. CLeaf rust✓
4. DRed rot✓