Detailed Explanation of Standardized Cultivation and Management Techniques for Pumpkin

Pumpkin is one of the older crops cultivated by humans, with a long planting history. Pumpkin has strong stress resistance, many varieties, strong adaptability, wide geographical distribution, high yield and good storability, and its fruits vary in shape, size and quality, with colorful fruit colors.

Pumpkin is an annual trailing herb. The stem reaches several meters long, roots at the nodes, is thick and strong, has ridged grooves, is covered with short stiff hairs, and the tendrils divide into 3-4 forks. Single leaves are alternate, the leaf blade is heart-shaped or broadly ovate, with 5 shallow lobes and 5 angles, slightly soft, 15-30 cm long, densely covered with down on both sides, often with white spots along the edges and on the leaf surface, and the edges have irregular serrations. Flowers are solitary, monoecious with unisexual flowers. Male flowers have a short receptacle. The calyx lobes are linear, with the apex enlarged into a leaf-like form. The corolla is bell-shaped, yellow, with 5 middle lobes, the lobes spreading outward and wrinkled. There are 3 stamens. The anthers are connivent, and the anther cells are regularly S-shaped and curved. Female flowers have prominent calyx lobes, leaf-like, the ovary is round or elliptical, 1-locular, the style is short, and the stigma is 3-lobed, each 2-cleft. The pepo is oblate, flask-shaped, cylindrical, etc., with longitudinal grooves and ridges on the surface, smooth or with wart-like protrusions.

It resembles orange segments, ranging from orange-yellow to orange-red. The fruit stalk has ridged grooves, and the fruit peduncle expands into a trumpet shape. Seeds are ovate or elliptical, 1.5-2 cm long, gray-white or yellow-white, with thin edges. The flowering period is May-July, and the fruiting period is July-September. It is native to southern Asia and is cultivated all over the world. The fruit is used as a vegetable; the seeds contain oil and can be eaten, and are used to treat prostate conditions, etc. The seeds (pumpkin seeds) and the fruit peduncle are often used as medicine, and can expel parasites, strengthen the spleen, and promote lactation. It is widely planted in China, and its fruit is edible. At the same time, pumpkin serves both as a vegetable and as a substitute for grain, and is very popular in rural areas. In recent years, people have found that pumpkin can not only fill the stomach, but also has a certain value as a food therapy, so the very rustic pumpkin has been able to enter refined settings.

Standardized Cultivation and Management Techniques for Pumpkin

1. Land selection and land preparation:

Pumpkin is not very strict about soil requirements. Sandy soil, clay loam, and loam can all be used for planting, but to obtain high and stable yields, sandy loam and loam rich in organic matter are most suitable. Because spring is rainy and autumn is dry, when making beds, deep furrows and high beds are required, and the bed width (including the furrow) is generally 1.8-2.3 m.

2. Seedling raising and field planting:

Pumpkin is sown in spring from January to March, and in autumn from July to August. Early-maturing cultivation uses seedlings for transplanting, while mid- and late-maturing cultivation uses direct sowing. For seedling raising, small plastic arched sheds are generally used for cold protection, and the seedling age is best 20-30 days. During the seedling stage, moisture and humidity should be controlled, and field planting is done when there are 2-3 true leaves. The plant spacing is 0.5-0.7 m, with 600-800 plants per mu.

3. Field management:

1. Fertilizer and water management

During land preparation, apply 2000-3000 kg of decomposed organic fertilizer per mu as base fertilizer. The amount of fertilizer applied depends on the plant development and soil fertility. Nutrients should be appropriately controlled in the early growth stage to prevent excessive vegetative growth. Generally, during the flowering and fruiting stage, potassium fertilizer or compound fertilizer is heavily applied, at 20-30 kg per mu.

After pumpkin field planting and before vine extension, try not to irrigate (sprinkle) water, and should promptly carry out intertillage to promote root development. Apart from timely irrigation when fertilizing, generally do not sprinkle water if the soil is not dry, and do not sprinkle water if the plants are growing vigorously. At the same time, timely drainage should be carried out.

2. Intertillage and weeding

Intertillage and weeding should be carried out from field planting until the vines extend and close the rows, trying not to loosen the roots, and appropriately earth up toward the root area to form small high ridges. As the pumpkin vines grow longer and gradually cover the ground, intertillage should no longer be carried out.

3. Pruning and vine pressing

Pruning and vine pressing are among the technical measures for obtaining early maturity and high yield in pumpkin. For varieties with overly vigorous growth and many lateral branches, removing some lateral branches, weak branches, and overlapping branches helps prevent excessive vegetative growth and improve ventilation and light conditions for the plants. When the vine extends to about 60 cm, carry out the first vine pressing. The method is to dig a shallow furrow 7-9 cm deep beside the vine, then gently place the vine into the furrow, and cover it with soil, leaving the growing tip exposed 12-15 cm. After that, press the vine once every 30-50 cm, generally 3-4 times. For early-maturing pumpkin cultivated at high density, press the vine once, or even do not press the vine.

4. Artificial supplementary pollination

Using artificial pollination can prevent flower drop and increase the fruit-setting rate. Pollination should be carried out on sunny mornings, gently smearing the open male flower on the stigma of the female flower to achieve pollination.

5. Harvesting and storage

Both young pumpkin and fully ripe pumpkin are edible. Generally, early-stage pumpkin and early-maturing varieties can be harvested as young pumpkin 10-15 days after flower drop, and fully ripe pumpkin can only be harvested 35-60 days after flower drop. The skin of fully ripe pumpkin generally has thicker waxy bloom, and the skin color changes from green to yellow or red, and it is not easy to break when lightly scratched with a fingernail. Generally, damaged, diseased-spotted, or immature pumpkin are not suitable for storage. Pumpkin for storage should be harvested on sunny days and stored indoors in a ventilated, cool place, and can generally be stored for 3-4 months.

4. Pest and disease control:

Pumpkin has relatively few pests and diseases. The main diseases are viral disease, powdery mildew, and anthracnose. Viral disease is mainly spread by aphids, so aphids must be controlled and eliminated. If diseased plants are found, they should be pulled up and burned as early as possible, and disinfected with lime to prevent spread; powdery mildew can be controlled with 205 triadimefon at 1500-2000 times, or colloidal sulfur at 500 times; anthracnose can be controlled with anthracnose thiram at 300-400 times, or Shibaogong at 1000-1500 times. The main pest is aphids, which can be controlled with jiyɑwei at 1000-1500 times, or Haoniandong at 2000-3000 times.