Effect Of Harvest Time Research Articles

English

The delay of maize harvest may affect the stem and grain sanity. This work was carried out aiming to evaluate the effects of harvest time on the incidence of stem rots and rotten grains of maize hybrids with contrasting growth cycles. The experiment was set in Lages, SC, during the 2012/2013 and 2013/2014 growing seasons. A randomized block design, disposed in split plots was used. Five single-cross hybrids were tested in the main plots: P1630H and P32R22H (hipper early cycle), P2530 (super early cycle) and P30F53YH and P30R50YH (early cycle).  Five harvest times were assessed in the split plots: 0 (grain physiological maturity), 10, 20, 30 and 40 days after physiological maturity. The incidence of stem rots increased proportionally to the delay in harvest time, regardless of hybrid growth cycle. More than 60% of the stems presented rot symptoms when harvest was performed 30 and 40 days after physiological maturity. Such behavior enhanced the percentage of lodged and broken stems when harvest was postponed. Harvest time did not affect the percentage of rotten grains, which was higher for hybrid P32R22H due to its poor ear husk coverage. Harvest delay affected more significantly the stem than grain sanity of maize hybrids. Key words: Zea mays, stalk rots, rotten grains, harvest delay.

Impact of biochemical composition on susceptibility of algal biomass to acid-catalyzed pretreatment for sugar and lipid recovery

One of the major challenges associated with algal biofuels production in a biorefinery-type setting is improving biomass utilization in its entirety, increasing the process energetic yields and providing economically viable and scalable co-product concepts. We focus on the impact of compositional characteristics of biomass on the susceptibility to pretreatment in order to maximize the valorization of algal biomass conversion for biofuels and bioproducts. The release of monomeric carbohydrates in the aqueous phase and extractability of the lipid fraction was measured based a response surface methodology to find significant explanatory variables and interaction terms. We studied the effect of harvest timing on the conversion yields, using three algal strains; Chlorella vulgaris and Scenedesmus acutus and Nannochloropsis granulata representing three different nutritional metabolic phases. Four cultivation conditions of high (≥90 gallon gasoline equivalent/ton biomass) value for a combined sugar- and lipid-based biofuels process were identified. These four conditions represent either mid or late stage harvest cultivation regimes. The results indicate that acid pretreatment has potential to be applicable for a vast range of biomass samples to obtain high energy yields, but that the exact conditions and optima are dependent on the strain and likely the starting composition of the biomass.

Effects of malaxation temperature and harvest time on the chemical characteristics of olive oils

The aim of the study was to determine the effects of harvest time and malaxation temperature on chemical composition of olive oils produced from economically important olive varieties with a full factorial experimental design. The oils of Ayvalik and Memecik olives were extracted in an industrial two-phase continuous system. The quality parameters, phenolic and fatty acid profiles were determined. Harvest time, olive variety and their interaction were the most significant factors. Malaxation temperature was significant for hydroxytyrosol, tyrosol, p-coumaric acid, pinoresinol and peroxide value. Early and mid-harvest oils had high hydroxytyrosol and tyrosol (maximum 20.7mg/kg) and pigment concentrations (maximum chlorophyll and carotenoids as 4.6mg/kg and 2.86mg/kg, respectively). Late harvest oils were characterized with high peroxide values (9.2–25meqO2/kg), stearic (2.4–3.1%) and linoleic acids (9.3–10.4%). Multivariate regression analysis showed that oxidative stability was affected positively by hydroxytyrosol, tyrosol and oleic acid and negatively by polyunsaturated fatty acids.

Variation of Yield and Loganin Content According to Harvesting Stage of Dipsacus asperoides Wall

Background: This study aimed to investigate the effect of harvest time on the growth, yield characteristics and loganin content in Dipsacus asperoides Wall. Methods and Results: Dipsacus asperoides seedlings were planted within a nursery environment in early May 2015 and harvested in early, middle and late October 2015, and early November 2015. Harvest time did not result significant differences in the plant height, stem diameter, branch length, leaf width and aboveground dry weight moreover, no significant differences were observed in root length, number of roots and root diameter. However, the diameter of lateral roots was greater in the harvests from the late October and period thereafter. The highest values of root dry weight and yield were recorded in early November. Specifically, the yield significantly increased from 205 ㎏/10 a (index: 100) in early October to 358 ㎏/10 a (index: 175) in early November, in terms of root part weight. Loganin contents of D. asperoides differed significantly among harvest times raging from 0.0766% in early October to 0.1704% in late November, thereby showing an increasing trend in later harvest times. Conclusions: These results suggest that the optimum harvest time for D. asperoides is early November, when the yield is the highest. Harvest time significantly affected loganin contents, which constantly increased from early October until early November.

Ursolic and Oleanolic Acid in ‘Aroma’ Apple Peel as Affected by Rootstock, Harvest Maturity, and Storage Method

Apples contain substances with health-promoting properties, among them, triterpenes, including oleanolic acid (OA) and ursolic acid (UA), which are thought to have anti-inflammatory activity as well as inhibiting initiation, promotion, and metastasis of cancer. This study evaluated effects of harvest time, rootstock, and storage method on two major triterpenes in apple peel, to enhance the understanding of the relative importance of cultivation and environmental factors influencing triterpene concentration. OA and UA concentrations in the semi-dwarfing ‘MM.106’ rootstock apples were significantly higher than in the dwarfing ‘M.9’ rootstock apples at the majority of harvest times over the 2 years of investigations. In 2012 at harvest time, highest concentrations of OA and UA in ‘MM.106’ rootstock apples were 63.4 and 416.3 μg·cm−2, respectively, while they were 59.7 and 380.9 μg·cm−2, respectively, in ‘M.9’ rootstock apples. UA remained fairly stable in most cases during storage, and no difference was found between regular atmosphere storage and controlled atmospheric (CA) storage. OA concentration decreased after harvest time. Furthermore, OA showed different responses to regular atmosphere storage and CA storage, and year-to-year difference was also observed. The two rootstocks showed only slight differences in the effect on total soluble solids (TSS) and fruit color, while the titratable acidity (TA) in apples from trees on ‘M.9’ rootstock had lower levels in most cases at the third harvest time as compared with apples from trees on ‘MM.106’ rootstock. OA concentration was positively correlated with UA concentration both directly at harvest and after storage. OA and UA concentrations were positively correlated with TA and TSS, while they were negatively correlated with red color.

The Effect of Harvesting Time and Variety on Fiber andCottonStalkYield Potential and its Companent for Use in the Pulp andPaperIndustry

Survey of cotton fiber yield, in addition to the identification of its best variety can cause cotton residual enhancement. The remainder of cotton stalk in farms is an illness-causing agent and leads to yield reduction in the next cultivation stage, an event which requires burial. So the usage of cotton stalk in the pulp and paper industry,which faces a shortage of raw material, results in a reduction intillage costs, thus, fiber and stalk yield potential gain importance. In this study, we investigated the effect of variety and harvesting time on cotton yield and its components, which was obtained from experiments of the plot of the 2009 cultivation year. An amount of dry material of each part of the components was also obtained. Experiments on factors containedfive varieties: Sepid, Sahel, Armaghan, Golestan and number200. The harvesting times were also three, namely: 145, 175 and 205 days after cultivation replicated in 4 blocks. Results of the variance analysis showed that the effects of variety and harvesting time on total dry material yields, leaf, stalk, bast and the core, cotton yield, empty and closed boll, stalk height and diameter were significated. The Armaghan variety in the second harvesting time had the highest cotton yield(2413.95) ,whilethe Sepid variety had the most cotton stalk yield in the third harvesting time(3716.76). Except for boll, cotton and total dry material yield, in the other evaluated characteristics, the third harvesting time had the best yield, and the most total dry material yield was related to the second harvesting time.

Harvest management affects biomass composition responses of C4 perennial bioenergy grasses in the humid subtropical USA

AbstractElephantgrass (Pennisetum purpureum Schum.) and energycane (Saccharum spp. hybrid) are high‐yielding C4 grasses that are attractive biofuel feedstocks in the humid subtropics. Determining appropriate harvest management practices for optimal feedstock chemical composition is an important precursor to their successful use in production systems. In this research, we have investigated the effects of harvest timing and frequency on biomass nutrient, carbohydrate and lignin composition of UF1 and cv. Merkeron elephantgrasses and cv. L 79‐1002 energycane. Biomass properties under increased harvest frequency (twice per year) and delayed harvest (once per year after frost) were compared with a control (once per year prior to frost). There were no differences between elephantgrass entries in structural carbohydrates; however, elephantgrasses had greater structural hexose concentration than energycane for single‐harvest treatments (avg. 398 vs. 366 mg g−1), a trait that is preferred for biofuel production. Delayed harvest of energycane decreased structural hexose compared with the control (374 vs. 357 mg g−1) because nonstructural components accumulated in energycane stem as harvest was delayed. Frequent defoliation (2X) increased N, P, and ash concentrations (75% for N and P and 58% for ash) in harvested biomass compared with single‐harvest treatments. We conclude that multiple harvests per year increase the harvest period during which feedstock is available for processing, but they do not result in optimal feedstock composition. In contrast, extending the period of feedstock supply by delaying a single harvest to after first freeze did not negatively affect cell wall constituent properties, while it increased length of the harvest period by ~30 days in the southeast USA.

An Investigation on the Effect of Harvest Time and Storage on the Quality Properties of Red Grape, the Variety of Fakhri Shahrood

An Investigation on the Effect of Harvest Time and Storage on the Quality Properties of Red Grape, the Variety of Fakhri Shahrood

Ontogenetic variation of active agent content of yarrow (Achillea collina Becker)

The effect of harvesting time on the drug quality of yarrow was examined in open field experiment between 2012–2014 using the variety Achillea collina 'Proa'. Sampling of the plants were carried out in five phenological phases during flower development (BBCH 55–69). Essential oil content, proazulene content, total flavonoid and total phenolic content of the dried shoots were measured. Additionally, the ratio of plant organs in each phenophase was determined.We established that the proportion of useful plant parts (flowers and leaves) in the drug increases from 56.33–59.83% (budding stage) to 65.17–73.07% (overblooming phase). The changes of chemical characteristics, however, followed these tendencies just partially. A peak accumulation level of essential oil (0.230–0.334mg/100g) was reached in white bud stage, after that the oil content decreased. The highest content of proazulene (0.123–0.183%) was measured in the same phenological phase. The flavonoid content of yarrow during flowering is presumably more variable than the content of other active compounds; it reached its maximum (0.900–2.837%) in green bud—early flowering phase while the total phenolic content showed two peaks: in green bud stage (178.0–233.4mgGAE/g) and in overblown phenophase (170.9–258.5mgGAE/g). Considerable year effect was detected in the case of each measured parameter. Based on the results, optimal drug quality could be achieved by harvesting yarrow in the first half of flowering (BBCH 61–65).

Establishing a semi-natural grassland: Effects of harvesting time and sowing density on species composition and structure of a restored Arrhenatherum elatius meadow

Species-rich semi-natural grasslands play an essential role in the conservation of European biodiversity. To restore them, existing grasslands may be used as a seed source. A key factor for successful restoration is the transfer of all species of the plant community to the site being restored. This approach, however, often poses practical problems due to variations in species phenology, so that only time-staggered harvesting allows the seeds of many species to be collected. Poor harvesting methods may reduce the number of species transferred from the donor to recipient site. The effects of harvesting at various time points by various methods were evaluated here in a restoration experiment on an ex-arable field in Northern Italy. Propagation materials from the first or second regrowth (or both) of a meadow dominated by Arrhenatherum elatius were collected by four harvesting methods. The materials were spread at the sowing density between 830 and 14360 seedsm−2. Species composition and structure of the vegetation were examined during 6 years. Untransferred species were almost exclusively those not present at harvesting as mature seed. Compared with materials from one regrowth period, materials from both regrowth periods significantly increased the number of transferred species per plot (26.5 vs. 28.5, respectively) and the absolute transfer rate (64% vs. 75%). Higher sowing density yielded a greater number of positive than negative effects. It favored stable establishment of donor site species and significantly reduced the presence of weeds. Nonetheless, due to the initial dominance of species with high sowing density, evenness of the restored plots was lower than that at the donor site but increased with time, at least under low- and medium-sowing-density conditions. Multiple harvesting at time points when several species with mature seed are present increases the species transfer rate. Medium sowing density positively affects restoration development because it promotes the establishment of donor site species with lower sowing density, prevents species with the highest density from dominating the vegetation during the first few years, and reduces weed cover.

The effect of harvesting time on seed oil content and fatty acid composition of some lemon and mandarin cultivars grown in Turkey

Citrus fruits usually processed into juice. The main residues are peel and seeds for citrus fruits after juice production. In order to evaluate the seeds for alternative usages; the oil content and fatty acid compositions of four mandarin (Citrus reticulata) and three lemon cultivars (Citrus limon) were determined with respect to their harvesting times. Oil content and fatty acid compositions of the samples were significantly (P<0.05) varied depends on cultivars and their harvesting times for each citrus species. Oil content ranged from 21.66 to 37.75% for these seeds. These results revealed that citrus seeds contain much more oil than many oil seeds. The citrus seeds oil combined from eight different fatty acids. The highest fatty acid was determined as linoleic acid (35.64-37.39%) for mandarin and oleic acid (32.99-36.39%) for lemon seed oil. These results revealed that citrus seeds could be valued as an edible oil source and other industrial area with respect to fatty acid composition.

온도에 따른 단삼의 광합성 특성 및 수확시기가 품질에 미치는 영향

Salvia miltiorrhiza has been used for treating heart and liver disease. In the present study, the influences of temperature on photosynthetical capacity of S. miltiorrhiza under controlled cultivation environment using growth chamber were investigated because of providing information about growth and secondary metabolite synthesis. And effect of harvesting time on growth properties and constituents such as salvianolic acid B, cryptotanshinone, tanshinone I, tanshinone IIA were evaluated. Maximum photosynthesis rate (5.102 μmol CO2/m2/s) and net apparent quantum yield (0.147 μmol CO2/m2/s), stomatal conductance (0.035 mmol/m2/s) and water use efficiency (7.108 μmol CO2/mmol H2O) was highest at 20°C. Results of chlorophyll fluorescence showed that elevated temperature had contributed to reduce a quantum yield and electron flux in photosystem. This result demonstrated that favorable temperature condition was determined at 20°C. Contents of salvianolic acid B, cryptotanshinone, tanshinone I and tanshinone IIA was highest in root sample harvested at 20 March, whereas growth and yield of S. miltiorrhiza had no significant differences with harvesting time. Therefore, this study shows that temperature play an important role in photosynthetic activity and harvesting time have influence upon accumulation of constituents in root of S. miltiorrhiza.

Harvest time and geographical origin affect the essential oil of Lippia gracilis Schauer

Lippia gracilis Schauer (Verbenaceae) is a promising shrubby aromatic species for the production and marketing of essential oils rich in thymol and carvacrol. The aim of this study was to evaluate the effect of harvest time and geographical origin on the essential oil of L. gracilis accessions. We tested the accessions LGRA106, LGRA107, LGRA108, LGRA109, LGRA110, LGRA201 and LGRA202, harvested in 2009 and 2012. The essential oils were extracted by hydrodistillation using a modified Clevenger apparatus. The chemical components were identified by gas chromatography coupled with mass spectrometry and flame ionization detection (GC/MS-FID). The essential oil contents of L. gracilis exhibited significant variation among accessions only in four-year-old plants. Accession LGRA202 had the highest essential oil content (4.66%), whereas the lowest content was recorded for accession LGRA107 (2.35%). When compared among harvest times, higher contents of essential oils were found in four-year-old plants. The largest variation was observed in accession LGRA202 plants, whose contents increased from 1.52% in one-year-old plants to 4.66% in four-year-old plants. In the two assessed harvest times, carvacrol was the major compound, except in accession LGRA106, whose major compound was thymol. Harvest time reduced the content of the major compound (carvacrol or thymol) of the essential oils from all accessions. Accession LGRA202 exhibited the largest reduction in carvacrol content, from 47.29% in one-year-old plants to 34.29% in four-year-old plants. The accessions exhibit chemical variability in the major compounds carvacrol or thymol. Harvest time and geographical origin affected the content and proportion of chemical constituents of essential oils of all L. gracilis accessions.

Changes of Major Components and Growth Characteristics According to Harvesting Times of Salvia miltiorrhiza Bunge

Background : This study examined the effect of harvesting time on the growth, yield characteristics, and major beneficial components in Salvia miltiorrhiza. Methods and Results : Although plant height, stem diameter and branch length were not affected by harvesting time, the number of stems was highest when harvested in mid October. There were no differences in root length and thickness, however, the rhizome was thicker when it was harvested at the end of October or early November than when it was harvested in early and mid October. The dried root weight also showed a similar pattern. However, there was a statistically significant increase to 408 kg (16%) in the rhizome weight when in late October and a rise to 455 kg (29%) when harvested in early November. Harvest time had little effect on the content of the major component of S. miltiorrhiza. For example, salvianolic acid content rose from 9.42 to 9.64% with later harvest times, and tanshinone content was tended to be slightly more increased in mid October which S. miltiorrhiza has 0.22% tanshinon than in early October. Conclusions : According to these results, the optimum harvest time for S. miltiorrhiza is early November when plant or major component yields are hightest. There were no significant harvest time effects on the major beneficial components.

Changes in major bioactive compounds with antioxidant activity of Agastache foeniculum, Lavandula angustifolia, Melissa officinalis and Nepeta cataria: Effect of harvest time and plant species

The continuous interest in medicinal plants has brought about todays modern processing and usage of different plants. Extracts obtained from the aerial parts of Agastache foeniculum, Lavandula angustifolia, Melissa officinalis and Nepeta cataria were investigated for their antioxidant activity and polyphenolic content. The extracts were prepared from plants harvested in two phenological phases of development (beginning of blooming and full bloom) and in two distinctive time points (11a.m. and 4p.m.). Different amounts of total phenolic content were measured (12.44–76.43mgGAE/g dry plant) and correlated with botanical origin, phenophase and harvesting hour. Flavone/flavonol content presented higher amounts than total polyphenol content in A. foeniculum extracts (36.87mgQE/g compared to 27.19mgGAE/g). All plants exhibit high antioxidant activity (73.14–81.74% inhibition and 0.265–0.554mM Trolox equivalents), measured with DPPH and FRAP method. Fingerprint of biologically active compounds highlights the potential of using these plants as value-added products, because of their content in phenolic acids and flavonoids with antioxidant activity. The quantity and profile of polyphenols was influenced by harvesting period and hour. The best moment for harvesting these plants in order to have maximum amount of bioactive compounds, was established to be in the first decade of June (beginning of blooming) and in the afternoon.

Effect of harvest time of spring safflower (Carthamus tinctorius L.) florets on the production of red and yellow pigments

A factorial experiment in a randomised complete block design with three replications was conducted to study the effect of harvest time of florets of spring safflower varieties on the amount of red (carthamin) and yellow (carthamidin) pigments in the petals. The first factor was the variety of safflower (MEC88, MEC59, Goldasht, Zendehrood, Sina) and the second factor was harvest time of florets (onset of flowering, after pollination at onset of petal wilting). The results showed that, at the onset of flowering, spring safflower varieties showed the highest yield of florets and MEC59, MEC88, Zendehrood and Sina showed good yield of florets. Harvest time affected the amount of carthamin and carthamidin; florets produced more carthamidin at the beginning of flowering and the amount of carthamidin decreased during flower development, while the amount of carthamin increased. The effect of cultivars was significant. To get the highest level of carthamidin, Zendehrood should be harvested at the onset of flowering. If carthamin is needed, Zendehrood should be harvested immediately after pollination, at the onset of petal wilting.

Effect of Keratocyte Supernatant on Epithelial Cell Migration and Proliferation After Corneal Crosslinking (CXL)

Purpose: To evaluate the effect of keratocyte supernatant (harvesting time, riboflavin concentration and UV-A-light illumination) on migration and proliferation of human corneal epithelial cells (HCECs) by CXL, in vitro.Methods: Primary human keratocytes isolated from 8 normal and 6 keratoconus corneas were cultured. Thereafter, keratocytes in 0%, 0.05% or 1% riboflavin solution were split into samples without and with 370 nm UVA-light-illumination. After removal of the riboflavin solution, keratocytes were incubated in the mentioned keratocyte culture medium at 37 °C and keratocyte supernatant was harvested after 5 and 24 hours. Keratocyte supernatant without riboflavin and UVA treatment, was used as control. HCECs were cultured until reaching confluence, the HCEC culture medium was replaced by the keratocyte supernatant and HCEC migration was analyzed using the wound-healing assay. HCEC proliferation was determined by the cell proliferation ELISA BrdU (colorimetric) kit. Statistical analysis was performed using a linear mixed model in the framework of a Generalized Estimating Equations (GEE) approach to analyze the effect of harvesting time, riboflavin concentration and UV-A-light illumination using IBM-SPSS version 22.Results: Riboflavin concentration, UVA-light illumination and harvesting time of normal or keratoconus keratocyte supernatant had no significant impact on HCEC proliferation (p > 0.10). Riboflavin concentration did not show significant impact on HCEC migration using normal or keratoconus keratocyte supernatant (p > 0.10), however, longer harvesting time of normal or keratoconus keratocyte supernatant significantly increased (p = 0.01 for both) and UVA-light illumination of keratoconus keratocyte supernatant (p < 0.001) significantly decreased HCEC migration.Conclusion: Harvesting time, riboflavin concentration and UV-A-light illumination of normal and keratoconus keratocyte cultures has no impact on proliferation of HCECs, in the short term. However, 24 hours harvesting time (both for normal and keratoconus keratocytes) increases and UVA-light-illumination of keratoconus keratocyte cultures decreases HCEC migration.

Effect of harvest times on the yield and seed quality of French bean

A two years field study was carried out in the research field and laboratory of Seed Technology Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh during rabi season of 2008-10. The aim of this study was to determine the effect of five different dates of harvest viz. H1: 65 Days after emergence (DAE), H2: 70 DAE, H3: 75 DAE, H4: 80 DAE and H5: 85 DAE on the seed yield and viability of French bean. The experiment was laid out in randomized complete block design (RCB) with four replications. Results showed that the yield and yield contributing parameters significantly influenced the days to harvesting. The highest seed yields of 1.15 and 1.31 t ha-1 were obtained from the harvest of 75 DAE (Days after emergence) in 2008-09 and 2009-10, respectively. On the contrary, seed quality parameters like seed germination, root length and vigour index were also significantly influenced by harvest time. The highest seed germination percentage of 91.33 and 91.56 were recorded from the seed plots harvested at 75 DAE (pods are light brown with few yellow colour) both for the year 2008-09 and 2009-10, respectively. Similarly, the vigour indexes (12.49 and 11.64) were the highest in seed harvested at 75 DAE from the year of 2008-09 and 2009-10, respectively. This might be due to more food reserve and dry matter accumulation on the seed at later harvest. However, seeds harvested in 80 and 85 DAE were also found good for seed yield and seed quality.SAARC J. Agri., 13(1): 1-13 (2015)

Effect of harvesting time and desapping on sapburn and quality in mango (Mangifera indica) cv. Langra

Sapburn is one of the most important problems in mango (Mangifera indica L.) which severely downgrade its quality and reduces its market value. In the present study, two experiments were conducted to study the effect of harvesting time on sap flow quantity; and its control through simple desapping treatment. The sap flow was recorded higher from the mango fruits (cv. Langra) harvested during morning hours. For the second experiment, mature mango fruits were harvested with 8 - 10 cm pedicel attached and treated with aqueous solutions of sodium hydroxide (1% and 2%) and potassium hydroxide (1% and 2%) by immersion method, after removing the pedicel. For control, sap was allowed to flow freely over the fruit surface. During storage of fruit at ambient condition (25±2°C) for 12 days, fruits desapped with 1% sodium hydroxide (NaOH) showed about 11-fold lower sapburn injury than control. Treatment with NaOH did not significantly affect TSS, acidity and carotenoids content in the fruit. However, it maintained significantly higher ascorbic acid, total phenolics content and antioxidant activity than control.

Effects of harvest time on functional compounds and fruit antioxidant capacity in ten strawberry cultivars

BACKGROUND: Huelva (Spain) is the main region for strawberry production in Europe. Most fruit production is exported for fresh consumption to European countries, where consumers demand high fruit quality and appreciate its healthy properties. Strawberry intake is a valuable source of antioxidants compounds with important health benefits. The higher the antioxidant capacity of a cultivar, the better the enhancement of human health. OBJECTIVE: The comparative knowledge of fruit composition on antioxidant compounds and its variation along the cropping season, in ten strawberry cultivars cropped at Huelva. METHODS: Fruit yield and citric acid, ascorbic acid, total phenolics, anthocyanins content as well as antioxidant capacity of fruits were evaluated in ten strawberry cultivars at three harvesting times during the 2014 field campaign. RESULTS:Yield and fruit parameters analyzed were strongly influenced by the genotype and by the time of harvesting. Strawberry fruit quality and antioxidant properties were greater when harvested from midto lateseason and were not associated with higher yields. CONCLUSIONS: Healthy properties of strawberry fruits depend on cultivar and harvest time. Knowledge of the nutritional properties of these strawberry cultivars might translate into benefits to growers and enhancement of health for consumers.