How to manage the off-season supply of virgin fruit in greenhouse over the summer

Virgin fruit is both ornamental and edible, with unique flavor and rich nutrition. Generally, the virgin fruit is cultivated in spring and autumn, which is high-temperature and rainy in summer, with many diseases and insect pests, which is easy to cause low yield or even no harvest, so the demand gap of virgin fruit in summer and autumn is larger. In summer, there are often some plastic sheds that are not used, which cover the sun and rain so that the virgin fruit can pass the summer safely, solving the needs of the off-season. The specific cultivation techniques of summer virgin fruit are as follows:

Virgin fruit

I. Variety selection

Select the varieties of "Virgin" and "Cherry Red" with strong ability and disease resistance. The virgin fruit of the "virgin" variety is jujube-shaped, and the "cherry red" is round.

Second, sowing seeds

1. Seed treatment before sowing: the suitable sowing time of over-summer virgin fruit is June 12-16. Soak the seeds in 55 ℃ warm water for 5 minutes, then soak in 30 ℃ water for 3-4 hours, then soak in 10% trisodium phosphate solution for 20 minutes, then rinse with clean water for 3-4 times, remove mucus and add the same amount of fine sand.

2. Sowing: by the way of direct seeding in the greenhouse, 5000 kg of mature organic fertilizer, 20 kg of N-P-K ternary compound fertilizer and 20 kg of superphosphate were applied after harvesting the last crop. After soil preparation, it is made into a wide 150cm border, with trenches 2-3 cm deep, each with 3 grooves. Sow 4-5 seeds per pinch, distance 20cm, cover the soil after sowing, and then water it. The bottom tuyere and waist tuyere of the greenhouse are opened. In case of wind and rain, close the tuyere to prevent Rain Water scouring and strong wind to uncover the film, usually 3 days and 4 days out of seedlings.

III. Seedling management

1. Watering: if the soil is dry, water a little in the morning or evening to keep the soil dry and wet.

2. Weeding between seedlings: when the seedlings of virgin fruit grow 2 true leaves, and time seedlings, 2 seedlings per pinch, set the distance between 20cm, and weed in time.

Mini tomato

IV. Management of flowering and fruiting period

1. Planting and pruning: at the early stage of flowering, 1 seedling per pinch and 4000-4500 seedlings per mu. The virgin fruit plant is tall and erect, so when it reaches 50cm, it should be set up to prevent lodging. Virgin fruit side branch growth is strong, double-dry pruning, choose to leave 2 strong branches, wipe off other side branches in time, generally do not top. The lower yellowing old leaves should be picked in time to reduce nutrient consumption and increase light and ventilation.

2. Flower thinning and fruit protection: soak flowers with 25ppm or 15ppm2.4-D. The virgin fruit blossoms and bears more per panicle. 20-30 fruits with good fruit setting are selected to remove other flowers and fruits, deformed fruits and rotten fruits.

3. Fertilizer and water management: during flowering, ditching and topdressing fertilizer, 150 kg of rotten hemp seed cake per mu. After the first ear fruit sat, 10 kg diammonium, 25 kg potassium sulfate and 20 kg urea were applied with water mu, and 20 kg potassium sulfate and urea were applied with water mu after the second ear fruit sat down.

V. Harvest

When it is fully mature, the sepals and a stalk of the virgin fruit should be retained during harvest and put on the market in time.

VI. Pest control

1. Aphids: on the basis of hanging silver gray film to avoid aphids in the vents of the greenhouse, omethoate can be used to control aphids.

2. Late blight: control with 65% Dysen zinc 500 times solution.

3. Botrytis cinerea: control with 1500 times of 50% prohydantoin wettable powder.

4. Helicoverpa armigera: after the moth is found, the moth should be controlled with quick killing and phoxim in time, with emphasis on the tender tip and ear part of the virgin fruit.

5. Virus disease: disinfect with 1% liter of mercury solution or 1% trisodium phosphate.