Some Unusual Rose Conditions

Posted on Tuesday, December 29, 2009 by admin in Techniques
Tags: Jazz, Jazz Concerts & Festiva, Jazz Dance, Jazz Events, Jazz General, Some Unusual Rose Conditions

This year the rose problems have been a bit different from other years. I thought it might be useful to list some of these to assist Master Gardeners when clients present problems with roses.

1. Symptoms of the first problem: In early June blossoms failed to open up normally This is referred to as “balling” of the blossoms. The edges of the petals were brown. The symptoms are more likely to occur on light colored roses. There are two possible causes listed in the textbooks. The first is botrytis, which occurs when we have periods of damp cool weather, so that’s hardly the cause this year. The second possible cause is an invasion of thrips. To check this, I opened the blossom and examined the petal base areas. There I found small, (1.0 nun) tan insects running around. Thrips do their damage by sucking juices from the petals. The trails for their successive penetrations shows a rasping pattern.