How to control diseases and insect pests of orchids?

Because the orchid root is fleshy, it is easy to reduce its resistance to diseases and insect pests due to rotten roots and gradual loss of conduction function. Also because the leaf sheath of the art orchid tightly wraps the leaf base, the orchid leaves overlap each other, the medicament is not easy to involve, bringing difficulties to the control. Therefore, we should do a good job in the following four aspects:

① Strictly disinfect: seedlings, substrates, pots and sites should be disinfected with 600~800 times solution sterilization insecticide.

(2) Pay attention to ventilation and light transmission, and cultivate with less nitrogen and more phosphorus and potassium to improve the stress resistance of the plant.

(3) To prevent, kill and inhibit the invasion of pathogens, aspirin (acetylsalicylic acid), a 1500-fold solution of medical antipyretic analgesic, was sprayed once a season to induce the strain to produce resistant eggs.

④ Control by root fixation and pesticide application. The residual period of pesticides is usually 7 to 10 days. For this reason, 3 - 4 times a month should be applied. Pesticide varieties should be alternated, concentration should be selected at medium concentration, and spraying should be comprehensive and thoughtful. Foliage, leaf back, basin surface, orchid frame and channel, environment should be fully sprayed and.