In winter and spring greenhouse cultivation conditions, due to poor ventilation in the shed, fewer insects are not conducive to pollination pollination, tomato pollination is easy to cause, early in the low temperature is not conducive to fruit set, these are likely to cause tomato fruit set rate decreased Poor fruit growth and development, the formation of malformed fruit, yield and quality are affected. Therefore, tomatoes cultivated in protected areas require artificial pollination to increase yield and quality. The specific operating skills are as follows:
In the early stage of flowering, 2,4-D, gibberellin, and anti-dropping hormones were used to increase pollination and fruit setting rates. 2,4-D can only be used to paint or dip flowers, the use of a concentration of 10-20 mg / kg, can not spray, do not let the liquid touched the leaves, otherwise it is easy to cause blade deformities. Tomato spirits are sprayed with 3-4 flowers on each inflorescence when open, at a concentration of 20-50 mg/kg, once for each flower. When the tomato blossoms, spraying with 10-50 mg/kg gibberellin can increase the fruit setting rate.
In the mid-flowering period, the use of anti-droplet spray effect, the use of a concentration of 25-40 mg / kg. Adding appropriate amounts of trace elements such as boron, zinc, copper, etc. in the liquid medicine is good for improving the fruit setting rate and promoting fruit enlargement. The concentration of use varies with temperature, and the concentration during use in winter can be increased as appropriate, but it should not be too high to prevent malformation.
Artificial pollination pollination method can also increase tomato fruit set rate, yield and quality. It is during the flowering period of tomato inflorescence that the oscillating inflorescence is artificially assisted in pollination, but careful handling is required to prevent injury to plants and inflorescences. This method can significantly increase the fruit setting rate and total yield of tomatoes compared to the use of anti-dropping agents.
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