It is the most important function of lime water to kill insects and kill bacteria and protect trees from being eaten by pests during dormancy period. In the early winter, insects like to lay their eggs in the gaps of the old tree skin, which makes the trees in danger, and the lime water can kill these pests, and make their "overwintering" plan fail, so as to greatly reduce the damage of pests in spring, so that the trees can be vibrant and full of spring.
Pests prefer dark and dirty places, not white and clean places. Therefore, the white of lime water will make them "flinch", and the pests in the soil will not dare to climb to the trees to harm the trees, so as to ensure the safety of the trees. Roadside animals are also very fond of grinding their teeth on trees, and this layer of lime can also play a certain role in protecting trees from too much damage.
To know that winter is very cold, we humans will wear thick down jacket to keep warm, so the lime water is equivalent to the "down jacket" of trees, which can keep the trees warm after drying, so that they can spend the winter safely. In winter, the temperature is very low at night, but in the daytime, due to the temperature rising, and the skin of trees is dark brown, easy to absorb light and heat, the temperature will rise very quickly. Such a big temperature difference will make trees easy to crack. Will lime water besmear, because it is white, can reflect off 40% to 70% sunlight to make tree white night temperature difference reduce, not easy to crack..
Finally, in agriculture, lime can be mixed with copper sulfate to produce the famous pesticide "bordell solution". It is a powerful bactericidal pesticide, which can be said to be of great use, to protect the plants.
