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Loquat/Japanese Plum Tree

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Article: Loquat
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Common name: Loquat, Japanese Plum
Botanical name: Eriobotrya japonica
Family: Rosaceae
Avg Height X Width: 15' x 15'
Origin: China
Season: January to April
Damage temp: 22 F

Loquat/Japanese Plum Tree in a 3 Gallon Container. Loquats are shaped like Christmas trees, but they have large fuzzy leaves that are green on top and silver underneath. The fruit tastes like a combination of peach and apricot. They are most often eaten fresh, in jellies and in wines. The trees will begin fruiting at just one to two years of age. Cold hardy tree good addition to any garden since it provides fruit during the winter months.

Origin and Distribution
Keeping Quality
Pests and Diseases
Food Uses
Food Value
Other Uses
Medicinal Uses

A fruit of wide appeal, the loquat, Eriobotrya japonica Lindl., (syn. Mespilus japonicus Thunb.), of the rose family, Rosaceae, has been called Japan, or Japanese, plum and Japanese medlar. To the Italians, it is nespola giapponese; to French-speaking people, it is néflier du Japon, or bibassier. In the German language, it is japanische mispel, or wollmispel; in Spanish, nispero, nispero japonés, or nispero del Japón; in Portuguese, ameixa amarella, or ameixa do Japao.


 A tree of moderate size, the loquat may reach 20 to 30 ft (6-9 in), has a rounded crown, short trunk, and woolly new twigs. The evergreen leaves, mostly whorled at the branch tips, are elliptical-lanceolate to obovate lanceolate, 5 to 12 in (12.5-30 cm) long and 3 to 4 in (7.5-10 cm) wide; dark-green and glossy on the upper surface, whitish-or rusty-hairy beneath, thick, stiff, with conspicuous parallel, oblique veins, each usually terminating at the margin in a short, prickly point. Sweetly fragrant flowers, borne in rusty-hairy, terminal panicles of 30 to 100 blooms, are white, 5-petalled, 1/2 to 3/4 in (1.25-2 cm) wide. The fruits, in clusters of 4 to 30, are oval, rounded or pear-shaped, 1 to 2 in (2.5-5 cm) long, with smooth or downy, yellow to orange, sometimes red-blushed, skin, and white, yellow or orange, succulent pulp, of sweet to subacid or acid flavor. There may be 1 to 10 seeds, though, ordinarily, only 3 to 5, dark-brown or light-brown, angular -ellipsoid, about 5/8 in (1.5 cm) long and 5/16 in (8 mm) thick.

Origin and Distribution

 The loquat is indigenous to southeastern China and possibly southern Japan, though it may have been introduced into Japan in very early times. It is said to have been cultivated in Japan for over 1, 000 years. The western world first learned of it from the botanist Kaempfer in 1690. Thunberg, who saw it in Japan in 1712, provided a more elaborate description. It was planted in the National Gardens, Paris, in 1784 and plants were taken from Canton, China, to the Royal Botanical Gardens at Kew, England, in 1787. Soon, the tree was grown on the Riviera and in Malta and French North Africa (Algeria) and the Near East and fruits were appearing on local markets. In 1818, excellent fruits were being produced in hothouses in England. The tree can be grown outdoors in the warmest locations of southern England. Cultivation spread to India and southeast Asia, the medium altitudes of the East Indies, and Australia, New Zealand and South Africa. Chinese immigrants are assumed to have carried the loquat to Hawaii. In the New World, it is cultivated from northern South America, Central America and Mexico to California: also, since 1867, in southern Florida and northward to the Carolinas, though it does not fruit north of Jacksonville. It was quite common as a small-fruited ornamental in California gardens in the late 1870's. The horticulturist, C.P. Taft, began seedling selection and distributed several superior types before the turn of the century, but further development was slow. Dwarfing on quince root-stocks has encouraged expansion of loquat cultivation in Israel since 1960. In the northern United States and Europe, the tree is grown in greenhouses as an ornamental, especially var. variegata with white and pale-green splashes on the leaves. In India and many other areas, the tree has become naturalized, as it volunteers readily from seed. Japan is the leading producer of loquats, the annual crop amounting to 17,000 tons. Brazil has 150,000 loquat trees in the State of Sao Paulo.


The loquat has been the subject of much horticultural improvement, increasing the size and quality of the fruit. There are said to be over 800 varieties in the Orient. T. Ikeda catalogued 46 as more or less important in Japan; over 15 have originated in Algeria through the work of L. Trabut; C.P. Taft selected and introduced at least 8 into cultivation in California; 5 or 6 have been selected in Italy; only 1 in Florida. A number of widely planted, named cultivars have been classed as either "Chinese" or "Japanese". In the Chinese group, the trees have slender leaves, the fruit is pear-shaped or nearly round with thick, orange skin and dark-orange flesh, not very juicy, subacid, but of distinct flavor. The seeds are small and numerous. The harvesting period is midseason to late and the fruits are of good keeping quality. In the Japanese group, the tree has broad leaves, the fruit is pear-shaped or long-oval, the skin is usually pale-yellow, the flesh whitish, very juicy, acid but otherwise not very distinct in flavor. The seeds are large and there may be just a few or only one. The harvesting period is early to midseason. Keeping quality is fair to poor. In Egypt, most loquats are of Lebanese origin. Egyptian horticulturists have selected from seedlings of 'Premier' 2 superior clones, 'Golden Ziad' and 'Maamora Golden Yellow' and have vegetatively propagated them on quince rootstocks for commercial distribution.


The loquat is normally pollinated by bees. Some cultivars such as 'Golden Yellow' are not self-fertile. 'Pale Yellow', 'Advance', and 'Tanaka' are partially self-fertile. In India, it has been observed that cross-pollination generally results in 10-17 % increased production over self-pollination. 'Tanaka' pollinated by 'Pale Yellow' has a lower yield than when self-pollinated, indicating a degree of cross-incompatibility. Whereas, when pollinated by 'Advance', the normal yield of 'Tanaka' is nearly doubled. When cross-pollinating for the purpose of hybridizing, only flowers of the second flush should be used, as early and late flushes have abnormal stamens, very little viable pollen, and result in poor setting and undersized fruits.


The loquat is adapted to a subtropical to mild-temperate climate. In China it grows naturally at altitudes between 3,000 and 7,000 ft (914-2,100 m). In India, it grows at all levels up to 5, 000 ft (1,500 m). In Guatemala, the tree thrives and fruits well at elevations between 3,000 and 6,900 ft (900-1,200 m), but bears little or not at all at lower levels. Well-established trees can tolerate a drop in temperature to 12º F (-11.11º C). In Japan, the killing temperature for the flower bud is 19.4º F (7º C); for the mature flower, 26.6º F (-3º C). At 25º F (-3.89º C), the seed is killed, causing the fruit to fall. Loquats are grown on hillsides in Japan to have the benefit of good air flow. Extreme summer heat is detrimental to the crop, and dry, hot winds cause leaf scorch. Where the climate is too cool or excessively warm and moist, the tree is grown as an ornamental but will not bear fruit.


The tree grows well on a variety of soils of moderate fertility, from light sandy loam to heavy clay and even oolitic limestone, but needs good drainage.


Generally, seeds are used for propagation only when the tree is grown for ornamental purposes or for use as rootstock. Loquat seedlings are preferred over apple, pear, quince or pyracantha rootstocks under most conditions. Quince and pyracantha may cause extreme dwarfing-to less than 8 ft (2.5 in). Quince rootstock tolerates heavier and wetter soils than loquat but is apt to put out numerous suckers. Loquat seeds remain viable for 6 months if stored in partly sealed glass jars under high humidity at room temperature, but the best temperature for storage is 40º F (5º C). They are washed and planted in flats or pots soon after removal from the fruit and the seedlings are transplanted when 6 to 7 in (15-17.5 cm) high to nursery rows. When the stem is 1/2 in (1.25 cm) thick at the base, the seedlings are ready to be top-worked. In India, inarching is commonly practiced but budding and grafting are more popular in most other areas. Shield-budding, using 3-month-old scions, is successful. Cleft-grafting has been a common practice in Florida. Veneer-grafting in April has proved to be a superior method in Pakistan. Cuttings are not easy to root. Air-layering may be only 20% successful, though 80 to 100% of the layers root in 6 weeks if treated with 3% NAA (2-naphthoxyacetic acid). Trees that are vegetatively propagated will begin to bear fruit in 5 years or less, as compared to 8 to 10 years in seedling trees. Old seedling trees can be converted by cutting back severely and inserting budwood of a preferred cultivar.


The rainy season is best for planting loquats. When planted on rich soil, normal size trees should be set 25 to 30 ft (7.5-9 m) apart, allowing about 83 trees per acre (200 per ha). In Brazil, a spacing of 23 x 23 ft (7x7 m) is recommended on flat land, 26 x 20 ft (8x6 m) or 26 x 16.5 ft (8x5 m) on slopes. Dwarf trees are spaced at 13 x 6.5 ft (4x2 m) in Japan and this may allow 208 per acre (500 per ha). The tree is a heavy feeder. For good fruit production the trees require ample fertilization and irrigation. In the tropics, animal manure is often used. A good formula for applications of chemical fertilizer is: 1 lb (.45 kg) 6-6-6 NPK three times a year during the period of active growth for each tree 8 to 10 ft in height. The trees should be watered at the swelling of blossoms and 2 to 3 waterings should be given during harvest-time. Thinning of flowers and young fruits in the cluster, or the clipping off of the tip of the cluster, or of entire clusters of flowers and fruits, is sometimes done to enhance fruit size. This is carefully done by hand in Japan. With the 'Tanaka' cultivar, the Japanese leave only one fruit per cluster; with the 'Mogi', two. In Taiwan, thinning is done by spraying with NAA when the flowers are fully open. In Taiwan, because of the hazard of strong typhoons, the loquat is grown as a mini-dwarf no more than 3 ft (0.9 m) high and wide, and branch tips may be tied to the ground because branches kept at a 451 angle flower heavily. Spraying with gibberellic acid (60 ppm) at full bloom enhances fruit set and increases fruit size and weight, total reducing sugars and ascorbic acid content, reduces fruit drop, number of seeds, and acidity. Spraying the same at 300 ppm results in small, seedless fruits. There should be judicious pruning after harvest, otherwise terminal shoots become too numerous and cause a decline in vigor which may result in biennial bearing. In Brazil, the clusters are bagged to eliminate sunburn (purple staining of the skin) to which both of the leading cultivars are susceptible. Because of the shallow root system of the loquat, great care must be taken in mechanical cultivation not to damage the roots. The growing of dwarf trees greatly reduces the labor of flower-and fruit-thinning, bagging, and, later, harvesting and pruning.


Generally, the loquat tree blooms in the fall and fruits in early spring. However, in tropical climates, the tree may flower 2 or 3 times a year beginning in July and set fruit mainly from the second flowering. In Florida, ripening begins in February; in California, usually in April; in Israel, the crop ripens from March to May. In Brazil, the harvesting extends from May to October.


Loquats reach maturity in 90 days from full flower opening. Determination of ripeness is not easy, but it is important because unripe fruits are excessively acid. Full development of color for each cultivar is the best guide. The fruits are difficult to harvest because of the thick, tough stalk on each fruit which does not separate readily from the cluster, and the fruits must be picked with stalk attached to avoid tearing the skin. Clusters are cut from the branch with a sharp knife or with clippers. Whole clusters are not particularly attractive on the market, therefore the individual fruits are clipped from the cluster, the stalk is detached from each fruit and the fruits are graded for size and color to provide uniform packs. Great care is taken to avoid blemishes. Major Japanese growers have monorail systems for conveying the picked fruits and equipment from their hillside plantations.


 Dwarf loquats in Israel have produced 7 tons/ha at 3 years of age, 25 tons/ha at 7 years. Normal size trees in Brazil are expected to bear 110 lbs (50 kg) per tree, 4.17 tons per acre (10 tons/ha) when planted at a rate of 83 trees per acre (200 trees/ha). The 'Wolfe' cultivar in southern Florida has borne 100 lbs (45 kg) per tree at 5 years of age; 300 lbs (136 kg) when 15 to 20 years old.

Keeping Quality

Loquats generally will keep for 10 days at ordinary temperatures, and for 60 days in cool storage. After removal from storage, the shelf-life may be only 3 days. Treatment with the fungicide, benomyl, makes it possible to maintain loquats for one month at 60º F (15.56º C) with a minimum of decay. Other fungicides tried have proved much less effective. Cold storage of loquats in polyethylene bags alters the flavor of the fruit, promotes internal browning and the development of fungi.

Pests and Diseases

In Japan, scale insects, aphids, fruit flies and birds damage the fruits and may necessitate covering the clusters with cloth or paper bags. Laborers can attach 1,000 to 1,500 bags per day. An acre may require 62,500 bags (150,000/ha). A pole with a hook at the tip is employed to bring each branch within reach. The process is labor intensive. In Israel, wire netting is placed over trees to protect the crop from birds. The Caribbean fruit fly (Anastrepha suspensa) has ruined the dooryard loquat crop for the past several years in Florida. The fruit flies, A. striata and A. serpentina, require control in Venezuela, the Mediterranean fruit fly, Ceratitis capitata, in Tunisia. Another fruit fly, Dacus dorsalis, is the major pest in India, forces the harvesting of mature fruits while they are still too hard to be penetrated, and the complete removal of all immature fruits at the same time so that they will not remain as hosts. The soil around the base of the tree must be plowed up and treated to kill the pupae. The second most important predator is the bark-eating caterpillar, Indarbela quadrinotata. Minor pests include leaf-eating chafer beetles, A doretus duvauceli, A. lasiopygus, A. horticola and A. versutus; gray weevils, Myllocerus lactivirens and M. discolor which attack the margins of the leaves. The scale insects, Coccus viridis, Eulecanium coryli, Parlatoria oleae, P. pseudopyri, Pulvinaria Psidii and Saissetia hemisphaerica suck the sap from loquat leaves and branches. Carpenter bees, Megochile anthracina, cut holes in the leaves and take the tissue to line their mud nests. Aphids (Aphis malvae) suck sap from twigs and shoots and sooty mold develops on the honeydew which they excrete. Flowers are attacked by thrips (Heliothrips sp.). The caterpillars of the anar butterfly, Virachola isocrates, bore into the fruits and lay eggs on the fruits, flowers and leaves. In New Zealand, a leaf-roller caterpillar eats into the buds and flowers. In California, the main pests of loquat are the codlin moth (Cydia pomonella), the green apple aphis (Aphis pomi) and scales. The roots of loquat trees in India are preyed on by nematodes–Criconemoides xenophax, Helicotylenchus spp., Hemicriconemoides communis, Haplolaimus spp. and Xiphinema insigne.


Pear blight (Bacillus amylovorus) is the major enemy of the loquat in California and has killed many trees. Phytophthora is responsible for crown rot and Pseudomonas eriobotryae causes cankers in California. Scab may occur on the bark of the trunk and larger branches. A serious disease is collar rot and root rot caused by Diplodia natalensis. D. eriobotrya sometimes affects the leaves. The parasitic fungus, Monochaetia indica, induces leaf spot in India. Leaf spot is also caused by the soil-inhabiting fungus Schlerotium rolfsii. Spilocaeae eriobotryae causes black spot on fruits and leaves in Italy and South Western Australia. Fleck, caused by the fungus Fabraea maculata is recognized by red-brown spots with whitish centers on leaves, shoots and fruit. In Florida, leaf spot may result from infection by Pestalotia sp. The foliage of young plants in Brazilian nurseries is damaged by the fungus Entomosporium maculatum. Other fungus problems of the loquat include stem-brown disease caused by Batryosphaeria dothidee; die-back from Macrophoma sp., withertip from Collectotrichum gloeosporioides, and twig blight and canker from Cytospora chrysospernw. Post-harvest fruit rot is the result of infection by Diplodia natalensis, Pestalotia sp. or Aspergillus niger. Sunburn, "purple spot", is responsible for much fruit loss in hot regions with long summers. Chemical sprays have been employed to hasten fruit maturity to avoid sunburn. Various types of bags have been tried in Brazil to protect the fruit from this blemish. The best are 2- and 3-ply newspaper bags.

Food Uses

The skin of the loquat is easily removed. Peeled and seeded fruits are eaten fresh, sometimes combined with sliced banana, orange sections and grated coconut. They are delicious simply stewed with a little sugar added. The fruits are also used in gelatin desserts or as pie-filling, or are chopped and cooked as a sauce. Loquats canned in sirup are exported from Taiwan. Some people prepare spiced loquats (with cloves, cinnamon, lemon and vinegar) in glass jars. The fruit is also made into jam and, when slightly underripe, has enough pectin to make jelly. The jelly was formerly manufactured commercially in California on a small scale.

Food Value Per 100 g of Edible Portion (Flesh)*

Calories 168
Protein 1.4 g
Fat 0.7 g
 Carbohydrates 43.3 g
Calcium 70 mg
Phosphorus 126 mg
Iron 1.4 mg
Potassium 1,216 mg
Vitamin A 2,340 I.U.
Ascorbic Acid 3 mg
*Analyses reported by the Agricultural Research Service of the United States Department of Agriculture.
 The fruit contains laevulose, sucrose and malic acid and lesser amounts of citric, tartaric and succinic acid. The pulp contains the carotenoids B-carotene (33%); y-carotene (6%); cryptoxanthin (22%), lutein, violaxanthin, neoxanthin (3-4% each). The peel is 5 times richer than the pulp in carotenoids which are similar to those in apricots.


A 5-year-old girl in Florida ate 4 unripe loquats, fell asleep and was difficult to awaken and seemed dazed. After about 2 hours, she was back to normal. There have been instances of poisoning in poultry from ingestion of loquat seeds. The seeds contain amygdalin (which is converted into HCN); also the lipids, sterol, b-sitosterol, triglyceride, sterolester, diglyceride and compound lipids; and fatty acids, mainly linoleic, palmitic, linolenic and oleic. There is amygdalin also in the fruit peel. The leaves possess a mixture of triterpenes, also tannin, vitamin B and ascorbic acid; in addition, there are traces of arsenic. Young leaves contain saponin. Some individuals suffer headache when too close to a loquat tree in bloom, The emanation from the flowers is sweet and penetrating.

Other Uses

 Wood: The wood is pink, hard, close-grained, medium-heavy. It has been used instead of pear wood in making rulers and other drawing instruments.

Animal feed: The young branches have been lopped for fodder.

Perfume: In the 1950's, the flowers attracted the interest of the perfume industry in France and Spain and some experimental work was done in extraction of the essential oil from the flowers or leaves. The product was appealing but the yield was very small.


The fruit is said to act as a sedative and is eaten to halt vomiting and thirst. The flowers are regarded as having expectorant properties. An infusion of the leaves, or the dried, powdered leaves, may be taken to relieve diarrhea and depression and to counteract intoxication from consumption of alcoholic beverages. Leaf poultices are applied on swellings.


weight 9.99 lbs


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