How to prevent and cure the stem rot of orchids more effectively?

About the soft rot of orchids. Prevention and Control of Stem Rot and Drug use 15-09-21 Muzizhai 185 + pay attention to flower offering (0) collection

With regard to the soft rot and stem rot of orchids in summer, all kinds of orchid diseases begin to be rampant, especially the soft rot and stem rot which do great harm to orchid grass, which are easy to latent, erupt violently and keep on rooting, which will make your joy come to naught in an instant. First of all, it is necessary to distinguish between soft rot and stem rot.

1. Soft rot is a bacterial disease. The disease begins with the new seedling. The characteristic is that the grass is black, soft and smelly from the inside to the outside, and the false bulb is soft rot. In the early stage of soft rot, tiny brown water stains appear on the leaves, and then expand into black moist patches, which are easy to rupture and discharge foul-smelling liquid. After that, the orchid plant will rot quickly. The disease is easy to occur in the rainy and humid season above 30 ℃. To prevent "soft rot", we must first make it clear that soft rot is a "bacterial disease" and the use of drugs should be targeted. The drugs to deal with it are chloramphenicol, streptomycin and penicillin. Chloramphenicol has a wider antibacterial spectrum and stronger antibacterial activity, but it is useless to deal with "soft rot", thiophanate and carbendazim.

2. Stem rot is a fungal disease, which starts from the father or the previous generation, characterized by the gradual yellowing and withering of the grass from the outside to the inside, and the false bulb yellowing and stiff, like a chronic disease. To prevent "stem rot", nail cream mancozeb (a reasonable combination of metalaxyl and mancozeb) can be used, which is a low toxic fungicide with both protective and therapeutic effects. Among them, Metalaxyl is an internal fungicide with protective and therapeutic effects, which can be absorbed by the roots, stems and leaves of plants and transferred to various organs of plants with the movement of water in the plant. Mancozeb is a protective fungicide with a wide spectrum of germicides. We should pay close attention to the use of medicine in the critical period. Soft rot usually occurs in hot and humid June, July and August at the turn of summer and autumn, so these three months are the key period for the prevention and control of soft rot, even if the disease is not found.