Small Bugs on Windows Screen
In September and October, people who have hackberry trees, or live in neighborhoods where there are hackberry trees, often notice tiny greyish bugs that congregate on their homes, on window screens, front doors and siding. These insects are attracted to lights at night and, at 1/10" long, are tiny enough to pass through ordinary window screen. People describe these bugs as gnats, flies or fleas. The photo above hackberry gall psyllid on the tip of a pencil!
These insects are adult hackberry gall psyllids (pronounced, sill-ids). Another name is "hackberry nipple gall maker". Under magnification, they look like miniature cicadas (what people in Nebraska commonly call "locusts"), which makes perfect sense, because they are in same order (Homoptera) as cicadas, leafhoppers and aphids.
In the fall, these insects are looking for cracks and crevices to squeeze into so they can hibernate without succumbing to lethal temperatures. Normally, they overwinter under the bark of trees, but psyllids don't distinguish between "good" and "bad" overwintering locations so they also squeeze into cracks and crevices around windows, doors and siding. Those that come inside are likely to die.
After adult psyllids come out of hibernation in the spring, they lay eggs on emerging leaves of hackberry trees. After the egg hatches, the young psyllid starts feeding, and the leaf responds by growing abnormally. It develops a small pocket that surrounds the insect, forming a "gall" (photo above). The psyllid spends the rest of the summer sucking on tree sap safely within the small gall. Several species of gall-making psyllids infest hackberry trees. Infested hackberry trees do not seem to be harmed by these galls, but their abundance makes hackberry leaves look pretty ugly.
Hackberry psyllids are not harmful to people or pets and will not attack house plants, stored products or furnishings. They are a temporary nuisance. As temperatures get colder, their activity will decrease and hibernation will set in.
Hackberry psyllids are so annoying that people sometimes ask about spraying hackberry trees to control them. During the summer, psyllids are protected inside the gall (photo right) from insecticides sprayed on the leaves so foliar treatments won't be effective then. Unfortunately, by the time psyllids emerge and start to move out of the trees, it is probably too late to achieve effective chemical control by spraying the trees.
A more effective preventative approach would be to treat trees in the spring to kill newly hatched nymphs before the onset of gall formation. But, because egg laying occurs over a period of several weeks beginning when new leaves unfold from the bud, several foliar insecticide applications would be needed. The labor involved makes this approach impractical, especially with large trees.
Treating hackberry trees with a systemic insecticide to kill psyllids when they feed would be ideal, but this proactive approach means planning ahead. Check out systemic insecticides at your home and garden store. One fairly new systemic product, Bayer Advanced Garden Tree & Shrub Control, contains imidacloprid which provides year-long control. It controls sucking insects, like aphids, psyllids, lacebugs and scale insects. It is even pretty easy to use. After determining the amount needed (based on the diameter of the tree), just mix the liquid insecticide in water and pour around the base of the tree. When using any insecticide product, be sure to read and follow all label directions.
IN/AROUND YOUR HOME:
Spraying with insecticides is not recommended. People who are really "bugged" by this problem and just have to do something can try hosing down their siding with water. This is likely to drown many of the psyllids, but, as long as temperatures are warm, more may show up the next day. A fine mesh window screen (18 mesh) may be small enough to prevent entry through open windows. For those insects that get inside, sucking them up with a vacuum cleaner is very effective.what are carcinogens How to be more productive? what age does marshalls hire How to double crochet How to turn off vpn on iphone Tips when getting up with a newborn occupational therapist does what What are your money saving tips? what does magi mean How tall do you have to be to model How to season a blackstone grill? what are grits How to get rid of cheek fat Fishing tips - how to flip far? what does an economist do How to express dog anal glands what channel does american idol come on How to create a hyperlink How to treat an ear infection? what does mc stand for in rap what does rna stand for How to connect airpods to macbook How to teach a puppy tricks youtube Why are my finger tips always cold How to get rid of lump in earlobe? Tricks on how to make your whole head curly for the next day Shipt see who tips what are the noble gases Tricks how to unplug the sink How to change your mouse cursor what does stud mean 5150 hold 14 days how to get released before 14 days tips Gta v how to fly helicopter tips what did brian williams mean How to reset your apple watch How to change icloud email? what does dulce mean How to store potatoes what do itchy feet mean what are subliminals How to use oculus quest 2 with steam How to renew global entry? what does ls mean on a car How to cancel bumble subscription Tips for when pitcure quality isnt very good How much do dealers make in tips what does it mean when you poop a lot what does persecution mean what dreams mean How to painlessly kill yourself? How to open xml file? How to change steam name? Why does depression play tricks with your mind How to grow your penis How to start an email? How to reset pc? what does bnha mean How to make old fashioned How to say black in spanish? what does an annual fee mean Tricks to packing jewelry when moving How to smoke ribs? Tips on how to stay alive in zombie rush roblox what does skol mean How to restart phone what does 90 chance of rain mean what does the medical term mean what does chick fil a pay How to floss with braces? Why don't business allow their employees to take tips How to make a magic tricks what does malignant mean Soccer stars by miniclip how tricks what does vagrant mean What do markups commissions sales tax simple interest tips have incomine what does boiling mean what does cody mean How to turn off focus on iphone what does it become uninhabitable How to tone inner thighs? How do people do street magic tricks How to play volleyball? How to find out who owns a house what time does starbucks open near me How to share screen on zoom? what are raisins made of What size exhaust tips 2000 monte carlos How to update google play store How to get rid of a keloid on ear what does significant mean what does she/they pronouns mean what does concubine mean what time are the grammys 2022 How long to wait for sex after yeast infection treatment what color are dany's eyes what does spot clean mean Where can you purchase custom drip tips for recoil rebel what does rage mean What tips are available for the acp71usz what does woke mean in 2019 How to get dot number How to do makeup for beginners Tips when closing on new construction hone what does chingona mean what does rst stand for chevy How to check wifi password on iphone? what character are you most like Street tricks where they levitate what does par for the course mean How to block people on snapchat How to get linkedin url How to sleep with covid? Tv show where they reveal magic tricks Why is my peace lily turning brown on the tips what are stars made of what does rule 34 mean what does ccm stand for 20 style tips on how to