Ask a Question
Notify Me On Question Update
Email this Question
I have a Bartlett pear tree that has black spots on the leaves and holes chewed on some leaves and a few curled up leaves. Could you tell me what to spray for these problems?
Rate This FAQ
Your young peach tree could have suffered some winter dieback, especially if a lot of the branch tips are black. It could also have severe iron chlorosis or peach twig borer. If the latter, there are several chemicals you could use including Dipel, Sevin, Ortho Bug-B-Gone, Malathion, Concern Multi-Purpose, Ferti-Lome, Green Light, Natural Guard, or GF-120. A dormant oil spray with insecticide applied when the flower buds are swollen, but not opened is beneficial. The insecticide alone (no dormant oil added) should be applied between June 21 and 26th.
You also mentioned that the leaves are yellowing and turning brown. If the veins are a darker green color, you probably have iron chlorosis. Severe Iron chlorosis will cause the tree to die, starting at the ends of the branches. To correct this, you should watch your watering. In our alkaline clay soils, the water ties up the iron. You should also add chelated iron in the spring at leaf bud swell. By the time all the leaves are full size, adding the iron doesn't do much good.
If you brought in a sample of your branch, we could tell whether it is iron chlorosis, winter damage or twig borer. It does cost $1. and our office is open Mon-Fri 8-5. For further information, you can call us at 851-8462
Submit Your Suggestion
Other Questions In This Topic
- When should I cut back spent tulips and daffadills?
- My greenhouse made of visqueen does not allow the sun to hit soil, causing the growth of algae on the surface. What must be done?
- What is the best thing to do with seedlings that are too tall for the seed starting kits? I have cauliflower and tomato plants that are 'leggy' and now too tall, but not yet ready to go outside. I received last week an advertisement about that hybrid zoysia grass that needs little watering and little mowing. Is that for real and if so, would it work in our climate? Supposedly it is cold hardy to -30. If I think that I there are gophers in my yard, what is the best way to eradicate them?
- I have seen ads for canada green grass seed. It talks about it's resistance to drought, and the fact that is a very hearty grass. Do you have any info on this grass seed?
- We tilled our garden and planted peas and lettuce about three weeks ago. Nothing has come up yet. We were talking to our neighbor yesterday, and he told us that about 30-40 years ago, in a fit of vexation, the former owner spread an industrial strength soil sterilizing chemical on the area in which we planted our garden. He further explained that weeds have only started to grow in that area in the past 5-10 years. This information has caused my wife to give up on trying to cultivate this area. Should we give up? What can we do to amend the soil in this area?
- When and how do I harvest my butternut and buttercup squash?
- We want to plant a couple of trees in our front yard that don't get very big (about 10 to 15 feet high). Can you suggest any are not messy and don't send up runners? If you have literature on selecting trees, could you send me a link?
- In the past you've offered a lawn-problem analysis --- as I recall a sample was brought in to your office and a quick analysis was done --- is the program still active? What is the schedule?