I think the rose developed rose canker. I have had several roses with this problem. The solution is to prune back to where you see only green canes and then treat with lime and sulfur solution. That has worked for me-it is sold at Ace Hardware store or Home Depot. Make sure you sterilize the pruner after use.
Pitting resistance equivalent number (PREN) is a measurement of the corrosion resistance of various types of stainless steel.Exact testing procedures are specified in the ASTM G48 standard. In general: the higher PREN-value, the more corrosion resistant the steel.The PREN-value is calculated using the following formula: PREN = 1 x %Cr + 3.3 x %Mo + 16 x %N (w/w) Steels with PREN-values above 32 are considered seawater (corrosion) resistant.urthermore a PREN-value â¥ 40 for duplex steels is called for in the DIN EN ISO 15156 as well as the American NACE â a standard for use in hydrogen sulfide environments known in the oil and gas extraction industries. Exception: stainless steels with molybdenum content â¥ 1.5% may have a PREN-value â¥ 30.
1 Short description: Preg compl NEC-unspec.  ICD-9-CM 646.80 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 646.80 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).