Price and planting method of papaya seedlings

Papaya, also known as Hawthorn, wood plum, begonia, etc., is a shrub or small tree of the genus Chaenomeles in Rosaceae. It is commonly cultivated for ornamental use, and the fruit is boiled or dipped in sugar solution for consumption. It has the effect of relieving alcohol, removing phlegm, relieving qi and stopping dysentery. I have cultivated in Guangdong, Guangxi, Fujian, Yunnan, Taiwan and other places. Let's take a look at the price and planting method of papaya seedlings.

How much is a papaya seedling?

The price of papaya seedlings is about 3-5 yuan, but the price varies greatly due to the quality, variety, specification and purchase market of papaya seedlings. In fact, people often say that papaya is divided into two kinds, one is edible papaya, the other is medicinal papaya, but now many people are confused. Medicinal papaya is Rosaceae papaya, edible papaya is tropical fruit papaya, so pay attention to the difference when buying seedlings, usually papaya can blossom and bear fruit in 3 to 5 years under good cultivation conditions.

Propagation methods of papaya seedlings

1. Cutting: when cutting, papaya is selected from the mother tree for 1-2 years, fully developed, disease-free and completely lignified branches as cuttings, cut the lower end near the node into a bevel, and quickly dip it in 0.05% rooting powder for 10 minutes and 15 seconds. Take it out and dry it for a little bit.

2. Tillering: many sprouting seedlings grow around the rhizosphere of papaya, which can be planted with strong seedlings with a height of more than 60cm and 80cm from September to November. the survival rate of seedlings obtained by this method is high, but the propagation coefficient is low.

3. Striping: in spring or autumn, papaya strips are selected to bend down the branches that are robust, disease-free and near the ground, press into the soil, cut part of the soil, fix it with wooden branches, and then pile the fertile soil on it. After the ring cutting, the roots are separated into separate seedlings.

Planting methods of papaya seedlings

1. Planting density: papaya can be planted in spring or autumn. After planting, the stem can be fixed at 70cm to 80cm on the ground. When sprouting, the root tillers and the sprouting within 50cm of the trunk base should be wiped out in time, and the over-dense new shoots should be properly removed. The row spacing of plants in mountain and hilly areas is generally 2 × 3 meters, 3 × 4 meters in flat land with good fertilizer and water, and 5 × 5 meters in intercropping with grain and vegetables.

2. Water and fertilizer management: most of the base fertilizers in papaya orchards are applied in autumn, accounting for about 70% of the total fertilizer application in the whole year. Topdressing should be carried out in the period of maximum fertilizer effect according to the growth and fruit of papaya trees. In the full fruit stage, trees should be topdressing before flowering, after flowering and fruit expansion, and the amount of fertilizer applied to young trees should be reduced. Irrigate once after fertilization and pay attention to water control during flowering. After planting in arid areas, the tree plate should be covered with plastic film or covered with grass to preserve soil moisture.

3. Flower and fruit management: flowers will be picked at any time from the first year to the second year of papaya. In the third year, we should strengthen management in spring and catch up with pre-flowering fertilizer, fruit expansion fertilizer and autumn fertilizer. The fruit setting rate of self-pollination of papaya is high, and it is easy to set fruit. Releasing bees or artificial pollination at flowering stage can increase the fruit setting rate. Papaya fruit has the phenomenon of self-thinning, poor pollination of the fruit will automatically fall off, every year after setting fruit in early May, as long as the small fruit, abnormal fruit can be removed.

4. Shaping and pruning: the middle stem of papaya is relatively upright after grafting, and can be shaped into a cup-shaped, cylindrical or slender spindle shape after a little pruning, usually in the shape of a slender spindle. Pruning is mainly sparse, and attention should be paid to cutting off competitive branches in the middle stem, erect long branches in the crown, over-dense branches, thin and weak branches, disease and insect branches and so on. The branch deficiency site can leave 1-2 buds with short weight to promote branching, and the senescent fruiting branch group should be retracted and renewed in time.

Disease control of papaya seedlings

1. Virus disease

[symptoms] the yellowing of new leaves is followed by uneven markings of yellow and green, smaller leaves, early withering and falling off, and oil-soaked stripes on stems, petioles and petals. Although it is not easy to bear fruit, round or oval continuous or discontinuous wheel spots occur on the fruit surface.

[control] select disease-resistant varieties, sow corn between rows one month after planting to prevent aphids from flying directly to papaya plants to spread the virus, and take turns to change dressing and spray aphids every 7-10 days.

2. Blight

Symptoms: dark brown spindle-shaped spots can occur at the base and middle of the seedling stem. With the development of the disease, the disease spots are sunken and constricted, and finally the diseased seedlings dry up and die.

[prevention and control] the seedbed should select plots with high dryness, good drainage and no vegetables, strengthen the management of the seedbed, pull out the diseased seedlings in time at the initial stage of the disease and spray 50% carbendazim 600 times liquid and other pesticides to control the spread of germs.

3. Powdery mildew

[symptoms] the leaves and petioles were granulated, followed by powdery conidia, which withered and yellowed the leaves.

[prevention and treatment] pay attention to ventilation, drainage, reasonable close planting, enhance ventilation transmittance, change the high-temperature, humid and stuffy microclimate in the field, and spray with 1500 times solution at the initial stage of the disease.

4. Anthrax

[symptoms] it harms fruits, branches and leaves. At the initial stage of the disease, the "little brown spot" on the fruit expands rapidly and causes the whole fruit to rot. The diseased fruit produces pink mucus in the case of high humidity, and becomes a stiff fruit after losing water.

[prevention and control] pruning diseased branches in winter, removing diseased leaves and burning them centrally, spraying 3-5 degrees stone sulfur mixture in winter, spraying 1000 times of methyl topiramate at the end of April (once every 10 days), and spraying 75% chlorothalonil more than twice at the end of May and the beginning of June.

5. Grey mold

[symptoms] the leaves of the injured papaya seedlings were as hot as water, and the young stems and shoots spread to a circle from the brown spots at the initial stage of the disease, causing wilting above the lesions to form standing or withered shoots.

[prevention and control] to strengthen winter prevention, after the seedlings are unearthed, they are sprayed once a week with 1DV 0.5 Vol 200 Bordeaux solution, or 1500 times of methyl topiramate once every 10 days. During the onset of the disease, 65% Dysen zinc wettable powder or 50% benzoate is used to control the disease.