Also talk about soft rot, stem rot and prevention experience

Recently, I saw a number of orchid friends tied up by soft rot and stem rot in the forum.

Soft rot and stem rot develop rapidly, once the orchid plant gets this disease, it is found that at least one big grass and seedlings will be lost if it is treated quickly; in serious cases, the whole plant will die. Make orchid friends "talk about 'corruption' color change"

Soft rot and stem rot should belong to the same type of bacterial diseases:

The pathogenic bacteria were all non-specific parasites: Pseudomonas, Xanthomonas, Euclid, Wild Corynebacterium and Corynebacterium, and the staining reaction was negative, among which Eucalyptus was the first enemy of stem rot.

Let's first take a look at the genus Erwiniacarotovorasubsp.carotovora: there are three kinds of pathogens: Euclid (Jones) Bergey et al. It is called carrot soft rot Eucalyptus carrot pathogenic variety, E.carotorora subsp. Atroseptica (Van Hall) Dye. It is said that carrot soft rot Euclidean black rot pathogenic variety and Pseudomonas caryophylli (Burkholder) Star and Burkholder called Pseudomonas caryophyllum are all bacteria. Among the three kinds of bacteria, Erwinia carotovora subsp. Carotovora and Pseudomonas caryophylli mainly caused brown rot stem rot, Erwinia carotovora subsp. Atroseptica mainly produces black rot symptoms. Erwinia carotovora subsp. Carotovora rod-shaped, obtusely round at both ends, size 1.0-2.0 × 0.5-0.7 (μ m), weekly 2-5 flagella, Gram staining negative, facultative anorexia. E.carotovora subsp.atroseptica rod-shaped, size 1.5-2 × 0.5-0.6 (μ m), can chain, no capsule, no spores, 2-8 flagella in the week. Gram staining was negative and facultative anorexia. Pseudomonas caryophylli rod-shaped, size 1.6-1.7 × 0.6-0.75 (μ m), polar multiple flagella, no capsule, no spores, Gram staining negative, accumulation of poly-β-hydroxybutyrate in the body, aerobic.

After understanding the properties of pathogens, we can prescribe the right medicine to the case.

Today's prevention: mostly streptomycin, leaf kuning, etc.; I am not very satisfied with its prevention effect; (because I raise fish under the orchid rack) want to use a more convenient method.

Since the pathogen is negative and a mixture of aerobes and anaerobes, I thought of chloramphenicol (I am a doctor)

Chloramphenicol: a broad-spectrum antibacterial agent; it has stronger antibacterial effect on gram-negative than gram-positive, not only on all kinds of bacilli, but also on anaerobes.

Drug source: drugstore ¥4.00 a box of chloramphenicol eye drops. 8 ml 20 mg, 2 bottles; each bottle with the same amount of water (preferably distilled water, can also use cold boiled water), the content is 1.25 inch 1000, put in the refrigerator and set aside.

Usage: in the rainy season, continuous rain, high humidity in the air, hot and stuffy weather, 2-3 drops along each Reed head in 7-10 days; the effect is very satisfactory.

It rained continuously a month ago; after several pots of rain, it rotted at the foot shells and cut flower ridges, among which a pot of longanin's new buds blackened; it occasionally dripped for 2 days and did not continue to develop.

Disadvantages: due to chloramphenicol injection, ordinary orchid friends are not easy to obtain, which is not convenient for noodle prevention. I only have 20 pots of orchids in less than 2 years.

The words of a family are for reference only!

Jin Xin