Answer

Blackspot

Question

I am having a bad problem with my roses. It started last year and has spread to several of my roses. On the leaves there are black spots and then the leaves turn yellow and fall off.

Answer

It sounds as if your roses have the dreaded black spot. This is a fungus that can completely defoliate your plants if it gets a good start and goes unchecked. As the name implies it starts with a black spot on the leaf. Now I've never had a rose bush actually die from black spot, but it can certainly cut down on their performance and make the shrubs look pretty shabby.

Black spot is usually brought on by weather conditions. Sporadic rain followed by humid to hot conditions is the ideal breeding ground for fungus. The rain soaks the plant, and then the weather heats up and causes the fungus to form on the damp leaves and petals. If the problem becomes severe, use a commercial fungicide for black spot and always try to get the plant completely saturated from top to bottom with the spray. Some serious cases of black spot require several treatments before the fungus is completely annihilated.

You should also spray the ground around your roses and put any diseased leaves in your trash not in your compost.

Share this articlePrint this article
Related articlesSave this article in your favorites

Comments

poultry problems

by dotti on September 15, 2013 02:27
I want to raise chickens and ducks but I don\'t have a coop. I live on 40 acre farm in ND. I am deciding between 6+ breeds of ducks and chickens but cant decide they\'re all pretty good egg layers and docile. I want pure breeds and have to have to have them all. What should I do? Where should I order them? Please help.

Virginia Creeper

by katherinelizabeth on August 11, 2013 12:41
Just another thought... the VC and the BK in my previous post are also nearly identical.

Targeting Just the Weed

by katherinelizabeth on August 11, 2013 12:39
If you want to use the synthetic weed killer close to good plants, try making a bottomless box out of an old cardboard one. Mark the outside of the box as such before you start spraying. Then place the box over the offending plant and spray... just it. Trick is to match the size of the box to the size of the weed you want to kill. But boxes are easy to come by, so you can make more than one. Had to do this to target some Bush Killer that came too close in my yard, and it did protect. Getting rid of the BK, however... well... :(

Dogwood tree

by gardenman18 on July 20, 2013 04:06
I want to learn how to plant a dogwood tree right way.

Clay Ground

by jackson.1943@yahoo.com on February 3, 2013 09:18
Will Roses do good in very bad clay ground?

Theme music

by betsi.vesser on October 13, 2012 09:15
I love this piece of music! It is so calming and just right for all those who love gardens. It actually describes my 94 year old mom who still likes to get out and work around in her garden! Thank you for giving us this lovely piece (peace) of music on each show.

Leave a Comment

You must be logged in to post a comment.