Maturity Indices and Harvesting Techniques for Fruits, Vegetables, and Flowers

Maturity Indices and Harvesting Techniques for Fruits, Vegetables, and Flowers

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  Maturity Indices, CommercialMaturity and Harvesting of Fruits, Vegetables and Flowers Prepared by Umesh Timilsina Assistant Professor CNRM, Bardibas Agriculture and Forestry University
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  Harvesting • Harvesting isone of the most critical operations in horticulture because the quality, shelf life, and market value of fruits, vegetables, and flowers largely depend on harvesting at the proper stage of maturity. • Harvesting too early results in poor quality, while delayed harvesting reduces shelf life and increases post-harvest losses. Maturity • Maturity is the stage of development at which a horticultural crop has completed its natural growth and possesses the ability to continue normal ripening, if required, and attain the desired quality.
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  Maturity Index orMaturity Indices • A maturity index is a measurable characteristic or group of characteristics used to determine whether a fruit, vegetable, or flower has reached the proper stage for harvesting. • These indices help growers decide the correct harvesting time for maximum quality and marketability. Importance of Maturity Indices • Ensure optimum eating quality • Improve storage life • Reduce post-harvest losses • Obtain maximum market price • Facilitate long-distance transportation • Ensure uniform ripening • Improve processing quality
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  Types of MaturityIndices A. Physical Maturity Indices Index Description Examples Size Fruit reaches characteristic size Mango, Papaya Shape Characteristic fruit shape develops Banana, Tomato Color Skin or peel changes color Mango, Citrus Firmness Flesh softens or hardens Tomato, Apple Weight Maximum fresh weight attained Watermelon Surface appearance Glossiness or wax formation Brinjal, Apple
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  B. Physiological MaturityIndices • Age from flowering • Days after fruit set • Days after planting • Seed maturity • Maximum dry matter accumulation Examples: • Mango: 100–120 days after fruit set • Banana: 90–120 days after shooting • Apple: 120–150 days after full bloom
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  C. Chemical MaturityIndices Parameter Importance TSS (°Brix) Indicates sweetness Acidity Determines flavour Sugar-acid ratio Eating quality Starch content Maturity indicator Dry matter Harvest readiness Oil content Avocado maturity
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  D. Visual MaturityIndices • Peel color • Fruit size • Fruit shape • Bloom disappearance • Spine drying: Rambutan: Skin and spines (spintern) shift from green to vibrant, bright red or yellow. • Drying of tendrils: Watermelon
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  Commercial Maturity orHorticultural Maturity • Commercial maturity is the stage at which a crop is harvested to meet market requirements rather than full physiological maturity. • Harvesting stage depends upon: Market demand Distance to market Storage facilities Transportation time Intended use (fresh or processing)
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  Harvesting for LocalMarkets • Produce sold nearby can be harvested at a more advanced stage because transportation time is short. Advantages • Better taste • Better aroma • Higher nutritional value • Attractive color • Better consumer acceptance Examples: • Fully ripe mango • Red tomato • Fully open flowers
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  Harvesting for DistantMarkets • Produce transported over long distances should be harvested at an earlier stage. Advantages • Reduced bruising • Longer shelf life • Better transportability • Lower spoilage Examples: • Mature green tomato • Green mature mango • Tight flower buds
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  Difference between Physiologicaland Commercial Maturity Physiological Maturity Commercial Maturity Crop completes natural growth Harvested according to market need Seed becomes viable Product suitable for sale Mainly biological stage Mainly economic stage May not be ready for marketing Ideal stage for transport and sale
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  Harvesting Stage ofImportant Fruits Fruit Local Market Distant Market Mango Fully ripe Mature green Banana Yellowish-green Mature green Papaya 25–50% yellow Color break stage Apple Fully colored Mature firm Citrus Fully colored Mature but firm Grapes Fully ripe Fully ripe Litchi Bright red Fully colored Guava Yellow-green Mature green
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  Harvesting Stage ofImportant Vegetables Vegetable Local Market Distant Market Tomato Red ripe Mature green Brinjal Glossy tender fruits Glossy tender fruits Cucumber Tender green Tender green Okra Tender pods Tender pods Cauliflower Compact curd Compact curd Cabbage Firm head Firm head Pea Green immature pods Green immature pods Onion Neck falls Neck falls and cured Potato Fully mature tubers Fully mature tubers
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  Harvesting Stage ofImportant Ornamental Crops Flower Local Market Distant Market Rose Half-open Tight bud Gladiolus 2–3 florets open First floret showing color Carnation Half-open Tight bud Chrysanthemum Fully open Half-open Marigold Fully open Fully open Tuberose 1–2 florets open Bud stage Orchid 1–2 flowers open Bud to partially open
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  Harvesting Methods • Harvestingmethods vary depending on crop type and intended use. A. Manual Harvesting • Harvesting by hand or using simple tools. Tools Used • Secateurs • Pruning shears • Sharp knife • Sickle • Scissors • Picking bags
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  Advantages • Less mechanicaldamage • Better quality • Suitable for delicate crops Disadvantages • Labour intensive • Time consuming • Higher cost
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  B. Mechanical Harvesting •Harvesting using machines. Examples: • Bloom disappearance Onion harvester Combine harvester Fruit shaker (nuts and olives) Advantages • Fast harvesting • Reduced labour cost • Suitable for large farms Disadvantages • Expensive machinery • Mechanical injury • Not suitable for delicate fruits
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  Harvesting Methods ofImportant Fruits Crop Harvesting Method Mango Hand picking with harvesting pole or clippers Citrus Clipped with secateurs Apple Hand twisting without pulling Banana Cut bunch using sharp knife Papaya Hand picking with knife Grapes Cluster cut with secateurs Litchi Cut fruit bunch with branch attached
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  Harvesting Methods ofVegetables Crop Method Tomato Hand picking Okra Hand picking every 2–3 days Brinjal Cut with knife Cucumber Twist or cut stem Cabbage Cut with sharp knife Cauliflower Cut curd with leaves attached Potato Digging by spade or digger Onion Pulling after neck fall
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  Harvesting Methods ofOrnamental Crops Crop Method Rose Cut with secateurs Gladiolus Cut flower spike with knife Carnation Twist stem at node Chrysanthemum Cut stem with knife Tuberose Cut spike near ground level Marigold Hand plucking
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  Precautions During Harvesting •Harvest during cool hours (morning or evening). • Avoid harvesting during rain or intense midday heat. • Use clean, sharp harvesting tools. • Handle produce gently to minimize bruising. • Do not overfill baskets or crates. • Keep harvested produce under shade. • Transport promptly to the packing house. • Remove damaged, diseased, or overripe produce. • Maintain hygiene throughout harvesting and handling.
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  Factors Affecting HarvestingTime • Variety or cultivar • Climate and season • Market destination (local or distant) • Consumer preference • Purpose (fresh consumption or processing) • Storage and transportation facilities • Weather conditions • Availability of labor
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  Key Differences BetweenLocal and Distant Market Harvesting Characteristic Local Market Distant Market Harvest stage More mature Slightly immature/commercially mature Eating quality Excellent Develops during transit Shelf life Short Long Transport damage More likely Less likely Ripening Before harvest During storage and transport
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  Key Points • Maturity:Stage when a crop has completed growth and can develop optimum quality. • Maturity Index: Characteristics used to determine the proper harvesting stage. • Commercial Maturity: Stage at which produce is harvested to meet market and transportation requirements. • Local Markets: Harvest produce at a more advanced stage for superior quality. • Distant Markets: Harvest earlier to extend shelf life and reduce damage. • Common maturity indices: Size, shape, color, firmness, days after flowering, TSS, acidity, dry matter, and seed maturity. • Harvesting methods: Manual harvesting is preferred for delicate horticultural crops, while mechanical harvesting is suitable for large-scale production of robust crops.