How to effectively control orchid anthrax?

For many reasons, the following comprehensive prevention and control measures must be taken to achieve obvious results.

① Both parties cooperate with quarantine inspection. I made this condition explicit to the mail seller when I sent the order, asking for phytosanitary and pest free purchases.

② After harvesting, wash the orchid plant carefully with clean water, especially the dirt in the angle between sheath leaf and leaf base "V", cut off the spots of undetected diseased leaves, then soak with 0.3% potassium permanganate solution for 10 minutes, and then rinse the residue with clean water to achieve the purpose of sterilization and disinfection.

3. The surviving pot plants should be observed at any time. Once found, they should be isolated. The heavy ones should be cut and burned. The light ones should be coated with zinc powder blending paste or burned with hot iron wire. At the same time, 600 times of zinc was sprayed every 15~20 days in early summer (especially for weak resistant varieties such as black orchid and cold orchid).

④ More than two days of rain in summer or hot rain in summer should be covered, and timely water deduction for ventilation and drainage is the most prone period. (5) Turn over the basin and replace the new soil in time in spring and autumn, clean up the pollution source regularly on weekdays, remove the weeds and loosen the soil regularly (do not hurt the roots), promote the rapid evaporation of accumulated water, aerate the soil aggregates and adapt to the light, at the same time, apply fertilizer and rejuvenate according to the growth, and pay attention to the combination of cooked bean cake water and potassium dihydrogen phosphate.