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  • Beneficial Properties of Stevia
    Prevents tooth decay 7 It has antioxidant antibacterial anti inflammatory anti aging properties and antigenic 8 Reduces serum uric acid 9 Facilitating passing urine 10 It s completely natural product 11 Not fattening 12 It can be used in cooking and baking 13 Does not increase your blood glucose 3 4 5 6 Bibliography 1 http fshn ifas ufl edu faculty mrmarshall fos2001 media stevia htm 2 http www med nyu edu content ChunkIID 21876 ref7 3 Research Library at Global Stevia Institute accessed 11 15 10 4 Barriocanal L A M Palacios G Benitez S Benitez J T Jimenez N Jimenez V Rojas 2008 Apparent lack of pharmacological effect of steviol glycosides used as sweeteners in humans A pilot study of repeated exposures in some normotensive and hypotensive individuals and in Type 1 and Type 2 diabetics Regul Toxicol Pharmacol Jun 51 1 37 41 5 Maki K C et al 2008 Chronic Consumption of Rebaudioside A a Steviol Glycoside in Men and Women with Type 2 Diabetes Mellitus Food Chem Toxicol 46 S7 S47 S53 2008 6 Dyrskog S E P B Jeppesen J Chen L P Christensen K Hermansen 2005 The diterpene glycoside rebaudioside A does not

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  • Plant morphology
    soil types According to this the most suitable soil types are however loam and sandy loam soils with high organic matter content In addition the plant requires long days to achieve maximum growth before flowering However Stevia needs quite a long day length sunlight in order to develop and produce biomass So under certain cultivation conditions such as 13 to 16 hours of daily sunlight the crop can increase in height between 0 6 1 0 m before flowering 1 The leaves are green they grow in pairs and their width ranges from 2 5 to 3 5 cm while the length reaches up to 6 cm Additionally it is observed that they grow in stem cross and their leaves can be growth in three different sizes small medium and large 2 The flowers are normally having white color their diameter is estimated to be about 8 15 mm and the inflorescence explants on the height of the developing sprout Furthermore they are hermaphrodite and are pollinated with pollination by means of insects Normally it is known that the flowering occurs in autumn 3 The sprouts at first are tender and then they become semi woody 4 The root system is superficial with few lateral roots developed and it cannot be tolerated either in the lack of water or under the power of strong winds 5 Stevia s matured seed is black and very small Each plant produces besides black brown and green seeds with less germination The brown seeds are non viable seeds which originated without fertilization However the black seed has no significant differences in germination among different fertilization treatments which indicates no genetic incompatibility The weight of a thousand seeds of the plant Stevia ranges between 0 15 and 0 30gr Under given conditions the seeds that

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  • Plant morphology
    different soil types According to this the most suitable soil types are however loam and sandy loam soils with high organic matter content In addition the plant requires long days to achieve maximum growth before flowering However Stevia needs quite a long day length sunlight in order to develop and produce biomass So under certain cultivation conditions such as 13 to 16 hours of daily sunlight the crop can increase in height between 0 6 1 0 m before flowering 1 The leaves are green they grow in pairs and their width ranges from 2 5 to 3 5 cm while the length reaches up to 6 cm Additionally it is observed that they grow in stem cross and their leaves can be growth in three different sizes small medium and large 2 The flowers are normally having white color their diameter is estimated to be about 8 15 mm and the inflorescence explants on the height of the developing sprout Furthermore they are hermaphrodite and are pollinated with pollination by means of insects Normally it is known that the flowering occurs in autumn 3 The sprouts at first are tender and then they become semi woody 4 The root system is superficial with few lateral roots developed and it cannot be tolerated either in the lack of water or under the power of strong winds 5 Stevia s matured seed is black and very small Each plant produces besides black brown and green seeds with less germination The brown seeds are non viable seeds which originated without fertilization However the black seed has no significant differences in germination among different fertilization treatments which indicates no genetic incompatibility The weight of a thousand seeds of the plant Stevia ranges between 0 15 and 0 30gr Under given conditions the seeds

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  • Seedlings
    those that are quite healthy and have a uniform growth with a rich root system There are three types of seedbed a the traditional b the float system and c the fog system p Traditional Seedbeds The traditional seedbeds dimensions are 1x10 m and are slightly raised to drain Special attention should be given to the soil which should be free of weed seeds light and rich in organic matter After sowing the seed we cover with a thin layer of peat and water it Float system The floating seedbeds float system that were also used to tobacco crop can also be used in Stevia giving the same good results Additionally the float system presents the following advantages 1 It is simple and reliable 2 It is free of weeds and needs no irrigation 3 It has a lower cost compared to other systems 4 The plants produced are uniform with a rich root system The trays used are polyurethane and the cells are reverse pyramid shaped with a depth of not less than 40 mm and a volume of 17 20 cm3 In each cell we place a seed During the seedbed period the aqueous developing solution needs refilling Before transplanting the plants are clipped to increase the diameter of the stem to obtain uniform size to restrict light competition to air better to prevent early flowering The seedlings are ready for transplant in 6 8 weeks after sowing The installation in the field occurs when the temperature is stabilized above 12⁰C Fog System The method of fog system is similar to the float system only here the trays are placed half a meter above the ground and the watering the nutrients and the pesticides are administered by the mist fog In vitro micropropagation The method in vitro micropropagation

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  • Seedlings
    those that are quite healthy and have a uniform growth with a rich root system There are three types of seedbed a the traditional b the float system and c the fog system p Traditional Seedbeds The traditional seedbeds dimensions are 1x10 m and are slightly raised to drain Special attention should be given to the soil which should be free of weed seeds light and rich in organic matter After sowing the seed we cover with a thin layer of peat and water it Float system The floating seedbeds float system that were also used to tobacco crop can also be used in Stevia giving the same good results Additionally the float system presents the following advantages 1 It is simple and reliable 2 It is free of weeds and needs no irrigation 3 It has a lower cost compared to other systems 4 The plants produced are uniform with a rich root system The trays used are polyurethane and the cells are reverse pyramid shaped with a depth of not less than 40 mm and a volume of 17 20 cm3 In each cell we place a seed During the seedbed period the aqueous developing solution needs refilling Before transplanting the plants are clipped to increase the diameter of the stem to obtain uniform size to restrict light competition to air better to prevent early flowering The seedlings are ready for transplant in 6 8 weeks after sowing The installation in the field occurs when the temperature is stabilized above 12⁰C Fog System The method of fog system is similar to the float system only here the trays are placed half a meter above the ground and the watering the nutrients and the pesticides are administered by the mist fog In vitro micropropagation The method in vitro micropropagation

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  • Climate
    a rainfall of 700 800 mm per year It grows at a temperature of 15⁰C to 30⁰C with a maximum temperature of 41⁰C It prefers climates ranging from temperate to tropical and cannot withstand low temperatures below 5⁰C For this reason in our country sowing should be done in seedbeds in late winter or early spring and transplanting should be carried out after the last expected frosts Sun light It is a photophilous plant and doesn t grow in shady locations The growth rate of the plant is reduced at temperatures below 20⁰C and a photoperiod of less than 12h The increase in the photoperiod to 16h and the high intensity of solar radiation increase the vegetative growth of the plant and the levels of stevioside The blooming is directly linked to the duration of the photoperiod and accelerates during short days Plants that flowered earlier had higher rates of stevioside but less weight Meanwhile the atmospheric moisture appears to play an important role in the plant development as cases of wilt have been mentioned in crops sufficiently provided with water when dry and warm conditions prevailed back to top About us Our overall goal is to ensure long term

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  • Soil
    height of 15 20cm and stem diameter of 5 1 mm The process can be done manually or with transplanters The date of transplanting plays an important role both in the final yields and the total concentration of sweeteners in the plant Early planting is desirable but only after the period of frost Typical distances chosen are 60x20 60x40 75x20 75x40 90x20 and 90x40 The number of plants per acre ranges from 3000 6000 Related research results have shown that the distance 75x40cm gives higher yields per acre while the distance 60x20 gives greater dry weight due to denser planting Fertilizing The plant has small nutrient requirements but nevertheless an audit of the soil structure is necessary In experiments conducted in Ontario Canada found that fertilizing with 6 24 24 fertilizer at 10 kg ha before transplanting and 14 kg ha urea after transplanting is satisfactory In experiments in our country it was found that stevia works best when done incorporating manure in the soil before transplanting and fertilizing according to the needs of local soils Generally nitrogen is the most important nutrient for stevia as it relates to the development of the foliage Stevia in the cultivation of the soil removes 10 5 2 3 and 18 pounds of N P K respectively There are no reports of specific requirements for plant micronutrient Irrigation In tropical areas stevia does not require irrigation But in areas such as Greece which in most areas the rainfall does not reach the 700mm per year irrigation is required The irrigation must be frequent and mainly on surface due to the restricted root system to achieve higher yields General irrigation is necessary when the tips of the stems begin to droop Good results also gives flush irrigation as it contributes to increasing the humidity

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  • Pests & Diseases
    και Sclerotinia sclerotiorum The Septoria creates cachexia accompanied by angular gray green spots usually surrounded by chlorotic contour The Sclerotinia characterized by brown spots that appear on the stem of the plant Follows withering and eventually collapse of the plant Alongside first mentioned in 2000 two other species of fungus Alternaria stevia Nees ex Wallr and Botrytis cinerea Pers Ex Fr in Stevia cultivation in Giza Pathogenic fungi Diseases that occurred in crops of stevia in Egypt are 1 Sclerotium rolfsii Sacc 2 Macrophomina phaseolina Tassi Goid 3 Fusarium oxysporum Schlect emend Snyd Hans 4 Fusarium semitectum Berk Rav 5 Fusarium solani Mart Appel Wr emend Snyd Hans 6 Rhizoctonia solani Kuhn From literature review has recorded the presence of the following diseases in cultivation of stevia 1 Erysiphe ichoracearum 2 Rhizoctoni solani 3 Sclerotium dephinii 4 Septoria steviae 5 Sclerotinia sclerotiorum 6 Sclerotium rolfsii 7 Alternaria steviae Insects The insects do not appear to constitute a serious danger for the cultivation of Stevia as the sweet flavor renders stevia s leaves highly resistant Have been referred very good resistance to aphids Some infections of snails observed in Stevia cultivation after the winter dormancy fight with baits if necessary back

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