Causes of rotten fruit shed Indoor lighting is insufficient for a long time in cloudy days or rain, snow, dust on the surface of the greenhouse film, resulting in lack of light in the greenhouse, humidity is too large. Young fruit grows in the dark and humid air for a long time and it is easy to cause rotten fruit. Shed room temperature is too high in the apricot young fruit period, if the temperature in the greenhouse exceeds 28 degrees Celsius, the shed film droplets will directly drop on the young fruit surface, causing rotten fruit. Protection was not timely, resulting in rotten fruit Because people mistakenly believed that apricot trees were cultivated under greenhouse conditions, there was no weather, insects, etc., spread pathogens and would not cause disease. Therefore, no spray or bactericide was sprayed, resulting in the development of apricot sores and germs. Causes rotten fruit. There are attachments on the surface of young fruit due to the poor ventilation conditions in the greenhouse, and the humidity is too high. After the apricot flower blossoms, many petals are not shed and they directly adhere to the surface of young fruit. With the growth and development of young fruit, these petals will absorb moisture when wet, and the parts that are in contact with the petals will be in a moldy and wet state for a long time, causing the fruit to rot. Preventive measures In response to the phenomenon of apricot rotten fruit in greenhouses, the following countermeasures are proposed for reference by fruit farmers. Improve the lighting conditions, adjust the control of temperature, humidity selection of high-quality non-drip film, if you are using the old film, you should promptly remove the dust on the surface of the film, increase the transparency; in cloudy or rainy days, the best indoor fluorescent lamp installation , Supplement light, improve the temperature of the greenhouse; try to use a light-transmitting spindle in the tree shape; sunny air ventilation in a timely manner to pay attention, keep the temperature of the greenhouse below 28 degrees Celsius, relative humidity of about 60% is appropriate. Timely spraying of pesticides in accordance with the different growth period of almond trees spray protection. Spraying 5 Baume degrees of lime sulfur before germination; spraying 70% thiophanate-methyl 1000 times after Xiehua; spraying 80% carbendazim 600-800 times in fruit enlargement; spraying 65% of mannozem in fast-growing shoots Zinc 1000 times. After the Xiehua, remove the attachments on the fruit surface in time and keep the fruit surface clean. After clearing the flowers, remove the petals that have not been litter and remove the leaves that cover the apricot fruit to prevent fruit from being attached to the fruit surface. Timely removal of the disease, concentrated handling of thinning, thinning, and reasonable loading. For varieties with strong knots, flowering and fruiting for a long time should be sparsely flowered, fruit thinning, and generally not suitable for contact when the fruit is mature.
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