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
- I have a relatively young peach tree which just split down the middle today, I'm assuming due to the weight of the peaches. I have cut off some of the branches and removed some peaches to help lighten the load. I called a nursery and they said in addition to doing that I should bring the branches back together and secure them together in attempt to save the remaining peaches. Then this fall I need to completely remove the partially broken branches. My questions for you are: Is this tree salvageable if I cut off 2/3 of its branches and will the peaches I've taken off ripen under any conditions?
- My Black Walnut tree is leaking sap terribly. What's wrong?
- I would like to dig up my geraniums and overwinter them. What is the best way to overwinter them?
- The leaves on my strawberry plants have turned a very pale green or yellow with some brown on the edges what do they need?
- About the end of July, some of my Hostas start turning yellow and eventually almost white. These get more sun that the rest. Is that the problem or do they need more fertilizer at some point.
- Do you have a list of good varieties of produce producing plants to grow in this area? I am looking to plant fruit trees this fall and start a garden next year.
- How do I keep birds out of my sweet cherry trees?
- Last May, I planted my living Christmas tree (5 foot Black Hills Spruce) after wintering it in a sheltered area with mulch. It was inside for only 3 days. It grew well all summer with little green buds until the first hard frost and then it died all at once. What happened? Was it the tree or the location? I live at 7,000 ft; the planting location is a little bit rocky and I don't want it to happen again. Thanks!!!