Key points of management techniques for autumn 茬 vegetable white dew

The farmer said: "A cold autumn rains." The white dew season is when the temperature drops and the rainfall is decreasing, which is good for the growth of vegetable crops. Bailu is an important period for the management of greenhouse vegetables, and it is also a key period for the management of vegetables in autumn and autumn. At the same time, it is necessary to strengthen the prevention and control of pests and diseases.

I. Bailu greenhouse vegetable management

The tomato, cucumber and other crops planted in the greenhouse in autumn are in the flowering stage; the summer and summer solanaceous fruits and vegetables are also in the flowering stage, such as loofah, bitter gourd, pepper, eggplant and so on. The weather of the white dew is gradually getting colder, which is conducive to flowering pollination and fruit expansion. In this case, field management should be strengthened to promote the fruit with high commodity rate.

Management measures

1 to adjust the appropriate temperature, light and humidity;

2 timely pruning and smashing;

3 to promote fruit set, tomato can take drone-assisted pollination or shock pollinator to assist pollination to increase the fruit set rate; eggplant is not easy to sit on the fruit when the temperature of the greenhouse is too high, you can choose the safe "good yield agent No. 2" spray or 蘸flower;

4 scientific watering, topdressing, control of water and fertilizer in the vegetative growth period, promote the root growth of the plant, control the upper part of the stems and leaves of the ground. The time of top dressing and watering can refer to the size of the first ear fruit. For example, cucumber can be watered and topdressed when the young melon begins to elongate;

5 To strengthen the prevention and control of pests and diseases, especially to prevent the occurrence of tomato yellow leaf curl virus, the door and the tuyere are closed with a 50 mesh insect net, and the control of the whitefly is strictly controlled.

Second, autumn and autumn open vegetable management

The cauliflower, cabbage, lettuce and other crops planted in the autumn field are in the rosette stage, which is the stage of the long outer leaves.

Management measures

1 It is necessary to cultivate loose soil and “saplings” to promote root growth and avoid excessive growth of leaves. If it is rained for 3 to 5 days after cultivating, it needs to be cultivated again to facilitate root growth. The "small seedlings" period is generally around 15 days;

2 watering and topdressing. When the "small seedlings" are over, they can be watered and topdressed. The per-mu open hole is applied to the ternary compound fertilizer about 15 kg;

3 It is necessary to timely control pests such as aphids and cabbage moths. High-efficiency, low-residue bio-pesticides such as Bacillus thuringiensis should be used, and such pests can be effective at night.

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