Such citrus for long-term living in the city, the vast majority of people should not have seen it, right?! Inedible, let alone sold for money.
Engaged in "agriculture + nature education" for several years, this situation will be this situation every year. Professionally, this phenomenon is called citrus sunburn, and the fruit that is yellowed by the sun is called sunburn fruit or sun fruit. How is the sun fruit formed? When the temperature on the surface of citrus peel reaches more than 40-45 ° C, the cell wall of the peel is destroyed, causing chlorophyll decomposition, which will lead to sun fruit or even fruit fall.
When the sun fruit first forms, it has small gray-blue or yellow-brown spots, and then the injured area gradually expands, forming a yellow-brown dry scar, the peel hardens, and the flesh is dehydrated, so that such a fruit cannot be eaten, let alone sold for money.
In fact, citrus sun fruit can be prevented. There are four methods: 1, spray sunscreen. 2. Reasonably prune fruit trees, use leaves to cover fruits, and reduce direct sunlight. 3. The use of high concentration stone sulfur compound, emulsion preparation and high concentration mineral oil is prohibited in summer high temperature. 4, the use of sprinkler irrigation, drip irrigation, irrigation and other facilities to maintain appropriate moisture and humidity.
In general, the sun fruit will bring a lot of losses to farmers, but learning to prevent it can reduce losses. At the same time, as a new generation of farmers, we must learn to adjust our psychological state to adapt to the various losses that may be brought to the planting industry in the face of bad weather, so that we can not be alarmed, respond freely, and always think about how to improve the quality of fruits.
