Ask a Question
Notify Me On Question Update
Email this Question
I have two new flowering pear trees that are being used as breakfast, lunch and dinner. I am not sure what is eating them the leaves have large scallops taken out of them. The lower branches have been affected more than the top ones. Any ideas?
Rate This FAQ
Without actually seeing the damage to your leaves it is difficult to give you an accurate diagnosis of what is happening. By your description there may be two different types of insects causing the notches in your pear tree leaves. Properly identifying what is causing the damage can help you decide on what control methods to use.
The first type of insect that causes damage like you described is a root weevil. Two common varieties that could be damaging your pear trees are Lilac Root Weevil (Otiorhynchus meridionalis) and Strawberry Root Weevil (Otiorhynchus ovatus). These insects are particularly hard to find on your plants because the adults hide during the day, only feeding at night and the larvae live in the root zone of the plant feeding on the tissues there. Because they can be difficult to find you could create a trap by placing a fold of burlap around the base of the tree or by burying a paper cup at soil level. This will allow you to collect a specimen. If it is root weevils a non-chemical method of control would be the use of commercial sticky traps placed in a protected area either in or near the tree. If you choose to use a chemical insecticide use one that is a Pyrethroid. The following link has more information on root weevils http://www.ext.colostate.edu/pubs/insect/05551.html
The second type of insect that may be causing the damage is Leafcutter bees. They are a native species of pollinators that use the portion of the leaf that they have notched out in rearing their young. These insects are not pests and control practices are not recommended because they are very beneficial in helping to pollinate our crops and ornamental plants.
By following this link you can see pictures that show what typical damage of both Root Weevil and Leafcutter Bees looks like.
To help provide you with a better diagnosis of what is happening to your pear tree leaves you can bring a sample into the USU Extension Office located at 2001 S. State Street for identification. Our office hours are Monday through Friday 8:00 am to 5:00 pm.
Precautionary Statement: All pesticides have benefits and risks, however following the label will maximize the benefits and reduce risks. Pay attention to the directions for use and follow precautionary statements. Pesticide labels are considered legal documents containing instructions and limitations. Inconsistent use of the product or disregarding the label is a violation of both federal and state laws. The pesticide applicator is legally responsible for proper use.
Submit Your Suggestion
Other Questions In This Topic
- We have scrub oak in our back yard. Almost overnight we have thousands of little green worms that have made webs over the leaves of the trees and are eating every green leaf in sight! Help! What do we do???
- What dwarf nectarine (or semi-dwarf) will grow well in SL County (on the East Bench)? Also, how much space will it need when fully mature?
- I have a grove of plum trees that make a nice addition to the landscape, but too much fruit is a problem. Is there something to treat the tree with so it doesn't produce fruit?
- We have five acreas in Cedar City and would like to plant some nut trees. Can you suggest some types/varieties that would do well here? Would any work or only some?
- Can you please give me an idea of when I need to spray my fruit trees (I have one each of nectarine, peach, apricot, apple and cherry).Can you let me know when, based on the weather in Cache county? What is the name of the best spray to use?
- I just found black spots on some of the peaches on my peach tree. I cut one peach open and the pit split in half really easily and there were small redish and black spots in the pit. I was wondering what are they, and if there's anything I can do about it?
- Apricots and peaches--what causes the reddish or purple-brown spots on new leaves, buds, shoots and fruit?
- This is the same question I ask every year. What is the best time to pick golden delicious apples near the Hilcrest School area in Logan.? Two, what is the best way to store apples when all I have is a regrigerator in the garage? Thanks for responding to my questions.