What precautions should be taken for pest and disease control?

(1) Spraying pesticides should be done in the morning or evening when temperatures are lower. (2) The diluted concentration of the pesticide solution should follow the instruction manual. If the concentration is too high, it will cause phytotoxicity; if too low, the effect will be poor. Also pay attention to the expiration date. (3) When spraying pesticides, it should be thorough and even; the leaf surface, leaf underside, pot rim and ground should all be sprayed. (4) If two pesticides are mixed for use, first read the instructions to avoid a chemical reaction that could make the pesticide ineffective or harm the orchid seedlings. (5) Do not use one pesticide for a long time; multiple pesticides should be used alternately to avoid resistance developing and affecting the control effect. (6) Most pesticides are toxic, so personal safety should be taken into account when using them.