Ask a Question
Notify Me On Question Update
Email this Question
My petunias are horribly sticky - I assume thrips are in control although I have tried to keep them washed off (insecticidal soap) and sprayed with a systemic (orthonex). Is there anything else I might try? Would a dormant oil spray work, and if so when would I use it? Also, there are small worms that are probably chomping the blossoms. What would work to prevent or kill them? How do worms can get into my flower boxes, that are at least 6 feet off the ground?
Rate This FAQ
Petunias exude a naturally sticky substance through their stems that also spread to the flowers. Although no one knows for sure why this phenomenon occurs only in petunias, many botanists believe it is a defense mechanism to trap sucking insects such as aphids and thrips. Many gardeners find the sticky substance to be a nuisance and therefore do not grow petunias for this reason. Breeders are working on new hybrid varieties that will not have this "problem". But if this is indeed a natural process to ward of insects, the new hybrids may result in more a more sticky problem.
As for worms - if you are having leaves that are eaten, it could be budworm, which is a caterpillar of a moth and Bt, Bacillus thuringiensis is effective on controlling caterpillars.
Submit Your Suggestion
Other Questions In This Topic
- Do garden vegetables such as tomatoes and cucumbers require sun protection,(shade), during the hot part of summer?
- I have a small backyard that has a house on the west and north side, a cinder block wall on the east side and a large tree shading a portion on the south side. Due to the high sides of our yard, we tried some part shade/part sun plants last year. But they got blasted in the heat. Our yard doesn't get 10 hours of sunlight but it gets very hot. Can I sucessfully grow a vegetable garden in part of it up against the houses and plant something along the cinder block wall - preferably grapes or raspberries, or other covering plants (can be non-fruit). Can you recommend a plant we can grow along the wall, both in the shaded and sunny parts? Any recomendations for better use of the space?
- Two questions; I have an dwarf Honey Crisp apple tree that is about 5 years old. Last year it had a dozen apples. I didn't disturb the fruit spurs when I picked the fruit. This year there were no blossoms on the tree. I didn't prune it at all. What can I do to help it produce every year? Second question; I have peach borers in the main branches of my nectarine tree. The tree seems healthy other than the borers. What can I do about them at this point? Will it help to dig them out? Will it help to spray? Will they winter over to next year?
- My backyard has far too much grass. I'd like to turn a fairly large portion of the lawn into waterwise beds and also expand my backyard vegetable garden. Two years ago, I made some beds by removing the turf. However, it is not only very hard work but it also results in a large amount of excess sod, and takes a good amount of topsoil with it. It also seems wasteful to send it to a landfill. Is there a way to kill the grass without herbicides? For example, will covering it with black plastic be an effective way to kill the grass? If so, how long will it be before I can plant in the new beds?
- I have a large, old walnut tree in my front yard. The bark on the east/northeast side of the tree is separating from the trunk. Is this a sign of disease or other problems? And can I peel the bark off the tree or will that hurt the tree?
- I have an 8 year old Norway Spruce. It has a section at the base where the needle grow is restricted and the stems look whitish. The rest of the tree has green plush growth and it is about 12 ft high now. It had this problem when I brought it home from the nursery but I thought it would snap out of it. What is this and is there anything I can do?
- I am about to remove a hedge of box leaf euonymous because they were affected by scale that I was not able to control. Is it possible to plant the same species in this spot again?
- The leaves on my strawberry plants have turned a very pale green or yellow with some brown on the edges what do they need?