FIG - TYPES , BIOLOGY ,DISEASES

 FIG  -Ficus carica

Article by - INDU  KEERTHI

The fig is the edible fruit of Ficus carica, a species of small tree in the flowering plant family Moraceae. Native to the Mediterranean and western Asia, it has been cultivated since ancient times and is now widely grown throughout the world, both for its fruit and as an ornamental plant. Ficus carica is the type species of the genus Ficus, containing over 800 tropical and subtropical plant species.A fig plant is a small deciduous tree or large shrub growing up to 7–10 m (23–33 ft) tall, with smooth white bark. Its large leaves have three to five deep lobes. Its fruit (referred to as syconium, a type of multiple fruit) is tear-shaped, 3–5 cm (1–2 in) long, with a green skin that may ripen toward purple or brown, and sweet soft reddish flesh containing numerous crunchy seeds. The milky sap of the green parts is an irritant to human skin. In the Northern Hemisphere, fresh figs are in season from late summer to early autumn. They tolerate moderate seasonal frost and can be grown even in hot-summer continental climates.

Figs can be eaten fresh or dried, or processed into jam, rolls, biscuits and other types of desserts. Since ripe fruit does not transport and keep well, most commercial production is in dried and processed forms. Raw figs contain roughly 80% water and 20% carbohydrates, with negligible protein, fat and micronutrient content. They are a moderate source of dietary fiber.

Dry figs

In 2018, world production of raw figs was 1.14 million tonnes, led by Turkey and North African countries (Egypt, Morocco, and Algeria) as the largest producers, collectively accounting for 64% of the total.[5]

The common fig is grown for its edible fruit throughout the temperate world. It is also grown as an ornamental tree, and in the UK the cultivars 'Brown Turkey'[26] and ‘Ice Crystal’ (mainly grown for its unusual foliage)[27] have gained the Royal Horticultural Society's Award of Garden Merit.[28]

Figs are also grown in Germany, mainly in private gardens inside built up areas. There is no commercial fig growing.[29] The Palatine region in the German South West has an estimated 80,000 fig trees. The variety Brown Turkey is the most widespread in the region.[30] There are about a dozen quite widespread varieties hardy enough to survive winter outdoors mostly without special protection. There are even two local varieties, "Martinsfeige" and "Lussheim", which may be the hardiest varieties in the region.[31]

As the population of California grew, especially after the gold rush, a number of other cultivars were brought there by persons and nurserymen from the east coast of the US and from France and England. By the end of the 19th century, it became apparent that California had the potential for being an ideal fig producing state because of its Mediterranean-like climate and latitude of 38 degrees, lining up San Francisco with Smyrna, Turkey. G. P. Rixford first brought true Smyrna figs to California in 1880. The most popular cultivar of Smyrna-type fig is Calimyrna, being a name that combines "California" and "Smyrna". The cultivar, however, is not one that was produced by a breeding program, and instead is from one of the cuttings brought to California in the latter part of the 19th century. It is identical to the cultivar Lob Injir that has been grown in Turkey for centuries.[21]

Ficus carica is a gynodioecious, deciduous tree or large shrub that grows up to 7–10 m (23–33 ft) tall, with smooth white bark. Its fragrant leaves are 12–25 cm (4+1⁄2–10 in) long and 10–18 cm (4–7 in) wide, and are deeply lobed (three or five lobes).

BIOLOGY

The fig fruit develops as a hollow, fleshy structure called the syconium that is lined internally with numerous unisexual flowers. The tiny flowers bloom inside this cup-like structure. Although commonly called a fruit, the syconium is botanically an infructescence, a type of multiple fruit. The small fig flowers and later small single-seeded (true) fruits line its interior surface. A small opening or ostiole, visible on the middle of the fruit, is a narrow passage that allows the specialized fig wasp, Blastophaga psenes, to enter the inflorescence and pollinate the flowers, after which each fertilized ovule (one per flower, in its ovary) develops into a seed. At maturity, these 'seeds' (actually single-seeded fruits) line the inside of each fig. See Ficus: Fig fruit and reproduction system.[citation needed]

The edible mature syconium stem develops into a fleshy false fruit bearing the numerous one-seeded fruits, which are technically druplets.[8] The whole fig fruit is 3–5 cm (1–2 in) long, with a green skin that sometimes ripens toward purple or brown. Ficus carica has milky sap, produced by laticifer cells. The sap of the green parts is an irritant to human skin

Figs can be found in continental climates with hot summers as far north as Hungary and Moravia. Thousands of cultivars, most named, have been developed as human migration brought the fig to many places outside its natural range. Fig plants can be propagated by seed or by vegetative methods. Vegetative propagation is quicker and more reliable, as it does not yield the inedible caprifigs. Seeds germinate readily in moist conditions and grow rapidly once established. For vegetative propagation, shoots with buds can be planted in well-watered soil in the spring or summer, or a branch can be scratched to expose the bast (inner bark) and pinned to the ground to allow roots to develop.[32]

Two crops of figs can be produced each year.[33] The first or breba crop develops in the spring on last year's shoot growth. The main fig crop develops on the current year's shoot growth and ripens in the late summer or fall. The main crop is generally superior in quantity and quality, but some cultivars such as 'Black Mission', 'Croisic', and 'Ventura' produce good breba crops.

 

TYPES OF FIG

Persistent (or common) figs have all female flowers that do not need pollination for fruiting; the fruit can develop through parthenocarpic means. This is a popular horticulture fig for home gardeners. Dottato (Kadota), Black Mission, Brown Turkey, Brunswick, and Celeste are some representative cultivars.Caducous (or Smyrna) figs require cross pollination by the fig wasp with pollen from caprifigs for the fruit to mature. If not pollinated the immature fruits drop. Some cultivars are Marabout, Inchàrio, and Zidi.Intermediate (or San Pedro) figs set an unpollinated breba crop but need pollination for the later main crop. Examples are Lampeira, King, and San Pedro.

There are dozens of fig cultivars, including main and breba cropping varieties, and an edible caprifig (the Croisic). Varieties are often local, found in a single region of one cultivar

Common  disease and pests

Disease

Alternaria rot (Surface mold) Alternaria spp.

Cladosporium herbarum

Ulocladium altumSymptoms

Small, olive-green specks or sunken yellow-olive lesions covered in green spores on fruit; water-soaked areas on fruit surface where figs touch

Botrytis limb blight

 Botrytis cinereaSymptoms

Cankers above and below fruit; shoots dying back; buff colored spores on shoots in late winter or early spring; blighted shoots; foliage on infected shoots wilting and turning light green or brown.

Smut Aspergillus spp.Symptoms

Internal sections of fruit or entire inside of fruit discolored; infected areas turn black and are covered with powdery black spores.

Fig blister mites 

Aceria ficusSymptoms

Blisters on surface of leaves which cause leaves to be russetted; twigs may be stunted and leaves may drop from trees.