In fruit-producing areas, there are a lot of fruit trees that endanger Tianchuan each year. According to the author's many years of experiments, the use of camphor pills to control the effect of Tianniu is quite good. It is both simple and economical and practical. The specific approach is: the fruit trees harmed by Tianniu, with fine iron wire to clean up the faeces in the hole as much as possible, put a 1/5 or 1/4 of a mothball into the hole, and then use the yellow mud to seal the hole, The mothballs can also be crushed and then dissolved in an appropriate amount of alcohol or gasoline, diesel. After the medicinal cotton is picked up, the cotton wool is stuffed into the holes with a thin wire, and the hole is sealed with yellow mud.
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