Similar Questions

Liz
06:42PM, 28 Oct 2009
Answer: Dear Liz, Without a great deal more information...
Category: Diseases
Expert
06:42PM, 28 Oct 2009
eileen
08:49AM, 29 Oct 2009
Answer: Dear Eileen, The damage on your Illawarra Flame...
Category: Pests
Expert
08:49AM, 29 Oct 2009
Jared
Medium_rose_leaves Rose bush has orange edges on leaves and bite marks.

The leaves on this rose bush have orange patches on them mostly around edges, and a lot of the lower leaves have fallen off. There are also bite marks or big circular chunks out of some leaves (picture attached). What would these two problems be, and how are they fixed?

Also a question on how to dead head spent rose blooms. I am wanting to know how much stem to prune when dead heading spent blooms and if there are any places on the stem to do this for better growth?

Thankyou for you help.
Jared

Submitted: 08:26PM, 13 Apr 2014
Answer: Hi Jared,

Your poor rose. It looks like it is being attacked from all sides. Don’t worry though as roses are very touch and respond well with a little care. The insect that is causing the chewed circular pieces on the edges of the leaves is a leafcutting bee. The female bees uses the leaf to line her nest. Bees are important pollinators and control is not necessary as they do little damage to plants.
I have attacked a link for you on leafcutting bees.

The other problem on your rose, evident with the browning around the edges is the result of fungal attack. Because of our climate with humidity increasing during the summer/autumn months, it is not uncommon for the foliage of roses to show signs such is present on your roses. You can easily control the spread of fungus by spraying a product that will specifically control such fungus. Yates produces an excellent product called Rose Shield. If you begin spraying this product in the early stages of the rose’s leaf growth and continue applying every two weeks as the rose puts on new growth, you will find you will be able to keep such fungal attack at bay.

It is also important to keep your roses strong and healthy. That means supplying the correct amount of nutrients in the way of a good fertiliser. We would suggest applying Dynamic Lifter Plus Flower Food every 6-8 weeks from early spring to mid autumn.

In winter, when you prune your roses, spray the pruned stems with Yates Lime Sulfur. This product will clean up any fungal spores that tend to over-winter on the plant.

You can also do a light prune on your roses in early summer to keep the bush compact. Cut back each bush by one third and you will find the stems will shoot again and produce some beautiful new blooms. Happy gardening and enjoy your roses.

http://australianmuseum.net.au/Leafcutter-Bee
Answered: 10:17AM, 02 May 2014

Comments

This area is for general comments from members of the public. Some questions or comments may not receive a reply from Yates. For specific gardening advice visit Ask an expert Alternatively you may wish to contact us.