Passion fruit production is constrained by several insect pests, diseases and inadequate knowledge on the
management of the crop among other factors. A grower needs to know a few basic facts about the crop.
The two types of commercially grown passion fruit in Kenya.
1) The purple passion (Passiflora edulis f. edulis) This type of passion fruit is most suited to upper midland
and highlands (1,100 to 2,500m above sea level). It has purple colored superior fruits of 4-5 cm in diameter
which have an aromatic flavor. It is good for fresh market and Juice extraction for local and export markets
2) Yellow passion fruit (Passifl ora edulis f. fl avicarpa) This passion fruit is most suited to the coastal lowlands. It is more vigorous and has a larger fruit of 5-7cm. It is more acidic and used for juice extraction. Yellow passionfruit is resistant to Fusarium; wilt, tolerant to Phytophthora blight, nematodes and brown spot.
It is used as rootstock to purple passion fruit.
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Seed extraction, planting and grafting
Step 1: Seed extraction
Healthy mature fruits of yellow passion fruit with a history of good bearing capacity are collected from parent plant. Seeds are scooped from the fruits.
• Extracted seeds are put in water for at least 3 days to ferment and ease separation of pulp and seed.
- The seeds are then dried under shade. Seeds lose viability rapidly if not stored in a dry, dark cool place.
Step 2: Planting
Seeds are planted into prepared beds or into 6 cm wide by 22.5cm high polyethylene bags filled with sterilized soil to eliminate root knot nematodes, soil borne diseases and other harmful organisms.
• Sterilization may be through solarization (using sun) or by use of steam.
• Germination starts after about 17 days.
Step 3: Grafting
Seedling rootstocks of yellow passion fruit are grown until they are at least 50cm high and 3-4 mm thick.
• Healthy seedlings with dark green leaves are selected for grafting.
• Scions from healthy high yielding true-to-type vines of purple passion fruit are collected preferably when the plants have flowered. Scion mother plants should be raised in areas protected against sucking insects, to reduce incidences of disease.
• Sterilization of grafting equipment between grafts must be practiced (use jik).
• Two methods of grafting are used. These are cleft (most common) and splice.
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- Seedlings should be watered regularly and protected from insects.
• All shoots from the rootstocks must be removed.
• Harden-off seedlings by exposing them to the sun gradually when scion shoot is about 10cm long.
• Remove grafting tape from the union and transplant seedling in the field one month after grafting
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A tree is usually kept to 3-6 trunks for fruit production. They tend to sucker around the base. These need to be removed, though they can be used as cuttings for propagation if you chose not to discard them.
Pomegranate is especially well adapted to the environments with cool winters and hot summers, but can be grown in the humid tropics or subtropics, and the plant will survive very well in Kenya. Commercial production is concentrated in dry summer climates, and pomegranate is extremely drought tolerant once established, but crops much better with more generous moisture. Pomegranate thrives on a wide variety of soils and has a high resistance to salinity.
Mango is one of the most important fruit crops in the tropical and subtropical lowlands. The mango industry in Kenya has expanded considerably over recent years, not only in size but also in the geographical location of commercial and homestead plantings. No longer is commercial mango cultivation restricted to the Coast region, as significant plantings of improved cultivars now also exist in the Makueni county, Meru County, Murang’a County, Nairobi County, Nakuru County, Siaya County, Taita Taveta County, Tana River County, Tharaka Nithi County, Bungoma County, Kitui County, Embu County, Machakos County, Kiambu County among other regions. But the generally arid eastern region produces 61 per cent of all mangoes, followed by Rift Valley at 30 per cent and Coast, which produces 28 per cent.
Main characteristics that differentiate varieties are the fruit shape, size, aroma, sweetness, color, fiber
content, taste, seed size and resistance to diseases. Proper selection of a mango cultivar for production must consider the following criteria:
• good adaptation to the local conditions (e.g. rainfall and dry periods)
• alternation of flowering and fruiting
• tolerance to pest and disease infections
• designated use and market requirements
The mango is best adapted to a warm tropical monsoon climate with a pronounced dry season (>3 months) followed by rains. However, information from other countries indicates that crops cultivated for a long time over an extended area show a high degree of diversity due to varied environmental influences.
Varieties include; Apple mango, kent, Haden, Tommy atkins,Van dyke etc
Mangoes are the most popular and full of nutritional and unique taste. its rich in vitamin A,C,E,and K
Peach trees grow best in full sun, where they can bask for at least six hours in the natural light. They prefer slightly acidic soils ranging from 6.0 soil pH to 6.5. Anything slightly under or over and the tree will still grow, but its yield and health may be adversely affected. The trees love sandy loam soil and demand good drainage. If soil drainage is poor, tilling in compost, sand or peat moss helps increase drainage capabilities.
Peach trees require the most water when they're young -- their first year in the ground -- with watering once weekly or, twice weekly. Peach trees may produce fruit during drought-like conditions if not watered, but the tree will become stressed and the fruit will lack size. To maintain soil moisture, add mulch around the tree but not touching the trunk itself.
Peaches can survive in cold winters where temperatures regularly reach zero degrees Fahrenheit, but the next harvest will be small or nonexistent. They thrive in climates where temperatures during winter reach 150C -30 0C degrees.
Peach trees that are expected to grow to a mature height of about 25 feet grow best when they have 20 feet of space between them. Dwarf peach trees thrive when planted about 6 feet apart. Planting trees too close together reduces air circulation and may prohibit growth and result in root damage.
The condition most limiting to growing an avocado tree is cold weather. Hass Avocado varieties are the most cold-hardy, but they can tolerate cold temperatures to only about 20 degrees Fahrenheit. During freezing weather, it helps to drape blankets or tarps over a young tree and anchor the coverings to the ground. If an avocado tree is large, then mounding soil or mulch high on the tree trunk for winter can help the tree survive cold temperatures.
An avocado tree can grow successfully in a variety of soil types and in soil with acidic or alkaline pH levels, but the tree requires soil that has good drainage. It declines in poorly draining and saline soil. Although an avocado tree cannot tolerate wet soil, it needs at least 1 inch of water every week during periods of insufficient rainfall. Not fertilizing the tree until it is 1 year old is recommended. Young trees need four applications of a balanced manure and older trees need twice-yearly applications of a high-nitrogen product applied in early December and late July.
habits as well as their training and trellising requirements. The fruit normally ripens within 25 weeks after the flowers first appear. The fruits range in weight from 40 to 90 g and can be picked shortly after the first frost in autumn; after that, they can be kept in cold storage for 4–6 months at 00 C. Kiwi vines can be grown on a wide range of soil types at elevations ranging from 1000 m to 2500 m.
The kiwi plant is dioecious, meaning individual plants are either male or female. Only female plants bear fruit, but only when pollinated by a male plant. Vines of both sexes are essential for fruit production, and they must flower at the same time to ensure pollination. One male pollinator vine is required for eight female vines. The vines are commonly supported on sturdy structures strong enough to bear the heavy fruit, which might otherwise break the rather weak vines. T-bars or hitching post trellises are recommended to support the large fruiting area in the
form of a canopy and provide easy access to the fruit.