Now accepting new clients for the season. Request your consultation today.
Now accepting new clients for the season. Request your consultation today.
Bagworms can defoliate and kill an evergreen in a single season and by the time most people notice the bags, it’s too late to spray. MW Lawn & Landscape treats bagworms across Olathe, Overland Park, Lenexa, and Johnson County in the narrow window that actually works, covering your junipers, arborvitae, and spruce inside and out. Licensed applicators, 25+ years local, and we know exactly when to act.
Bagworms are one of the most destructive pests on Kansas evergreens, and the reason they’re so dangerous is that they hide in plain sight. Each one builds a spindle-shaped bag out of the tree’s own foliage, so an infestation looks like part of the plant until the needles start disappearing. On an evergreen, that’s a serious problem: junipers, arborvitae, spruce, and pine have no dormant buds to regrow lost needles, so a heavy infestation can defoliate and kill the tree in a single season. Deciduous trees usually recover; evergreens often don’t.
Everything comes down to timing. Bagworm eggs hatch in late May and early June, and there’s a window of a few weeks while the larvae are small and feeding when treatment works extremely well. Miss it, and by mid-to-late August the caterpillars seal their bags to pupate and a mature bag repels insecticide, making sprays useless. At that point each female is laying up to a thousand eggs for next year. We treat in the window that works, and we cover the whole tree, inside and out because bagworms live in the interior branches and just spraying the outside doesn’t solve anything. It’s part of our tree and shrub insect control service.
We treat in the late-spring-to-early-summer window when larvae are small and vulnerable the only time spraying reliably works.
Bagworms hide in interior branches and move outward. We treat the whole tree thoroughly, not just the outside, so they can’t survive deeper in.
Junipers, arborvitae, spruce, and pine can’t regrow lost needles. We prioritize the plants a bagworm infestation can actually kill.
If the bags are already sealed for the season, we’ll tell you honestly and set you up with a prevention plan for next spring instead of selling a spray that won’t work.
Testing, a matched blend, and precise placement so the feeding actually reaches the tree.
We scout your junipers, arborvitae, spruce, and other susceptible plants for bags including the small early ones most people miss.
We treat in the late-spring-to-early-summer window when larvae are small and control is highly effective.
Complete coverage of the whole tree, interior branches included, so bagworms hiding inside don’t survive to keep feeding.
For trees with a history of heavy infestation, a follow-up spray a few weeks later catches late-hatching larvae.
We’ll set up next season’s timing for trees that have had bagworms before so you’re treating before damage, not after.
If it’s too late to spray effectively, we tell you and show you how hand-removing bags over winter protects next year.
The tree-health signs that point to a root-zone problem and how deep root fertilization helps.
25+ years timing bagworm treatment to the Kansas hatch and honest about when it’s too late to spray
Hatch is late May into June, and the effective window is short. We track it and treat when it actually works not on a random schedule.
Big evergreens and windbreaks need real reach and pressure to treat inside and out. A hose-end sprayer can’t do it; we can.
If the bags are sealed for the season, we won’t sell you a useless spray we’ll plan next spring and show you free winter prevention.
Bagworms today, whatever’s next tomorrow one local team watching your trees, shrubs, and lawn all season.
Three steps to healthier trees from the roots up.
Fill out the form or call 9138294949 . We’ll scout your evergreens and confirm whether it’s bagworms and whether it’s time to treat.
In the late-spring-to-early-summer window, we treat the whole tree inside and out while the larvae are small and vulnerable.
For trees with a history, we plan next season’s timing and follow-up so the bagworms don’t come back.
What homeowners in Olathe and Johnson County ask us about bagworms.
Still Have Questions? Call our team or submit a quote request we’re happy to answer anything before you book
The window is late spring into early summer. Bagworm eggs hatch in late May and early June here, and the few weeks after that through June and into early July are when the larvae are small, actively feeding, and highly vulnerable to treatment. For a tree that hasn’t had heavy bagworm damage before, one thorough, well-timed spray in late June or early July usually does it. For a tree with a bad history, two treatments one in early-to-mid June and another three to four weeks later catch the late hatchers too.
It can be, and we’ll be honest with you about it. Once the caterpillars mature and seal their bags to pupate usually mid-to-late August spraying no longer works, because a closed bag repels insecticide and the insect inside is protected. At that point each female is laying up to a thousand eggs for next year. If you’re calling late in the season, we won’t sell you a spray that can’t work; instead we’ll show you how removing the bags over winter protects next year, and we’ll plan your treatment for the spring window.
Yes with a big timing caveat. The most effective organic option is Bt (Bacillus thuringiensis), a naturally occurring bacterium that kills young caterpillars but is easy on beneficial insects. The catch is that Bt only works on small, actively feeding larvae, roughly late May through mid-June; once the bagworms get larger it stops being effective. Spinosad is another organic option in the same early window. After midsummer, the only truly ‘natural’ method left is hand-picking the bags off the tree. If you want an organic-first approach, the key is acting early tell us and we’ll time it right.
On evergreens, yes and faster than most people expect. Junipers, arborvitae, spruce, and pine don’t have dormant buds to push out new needles the way leafy trees regrow leaves, so once bagworms strip the foliage, that part of the tree doesn’t come back. A heavy infestation left untreated can defoliate and kill an evergreen in a single season. Deciduous trees and shrubs maples, oaks, roses usually recover by sprouting new growth, so they’re far less at risk. That’s exactly why we treat evergreens as the priority.
For a small tree or a light infestation, hand-picking genuinely works and here’s the pro tip most people don’t know: the best time to do it is late fall through early spring, November to April, when the bags contain next year’s overwintering eggs. Pull every bag you can find and drop them in soapy water, and you remove next season’s infestation before it ever hatches. Where it breaks down is on large evergreens or a whole row you can’t reach or find them all, and the ones you miss reinfest everything. That’s when a well-timed spray is the practical answer.
You can treat them yourself if the timing is right and the tree is small enough to cover completely that’s a real if. The two most common reasons DIY bagworm treatment fails are missing the narrow window and not getting full coverage: bagworms live in the interior of the tree and move outward, so spraying only the outside leaves plenty behind to keep feeding. On tall evergreens, arborvitae hedges, or a windbreak, getting thorough inside-and-out coverage takes equipment most homeowners don’t have. That’s where hiring it out pays for itself especially given what a lost evergreen costs to replace.
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Bagworms are one pest we treat under our broader insect control service. Here’s how it fits.
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The treatment window is short, and evergreens don’t grow back. Let MW Lawn & Landscape scout your trees and treat at the right time, inside and out or plan next spring if it’s too late this year. Free quote, no pressure