How to kill bagworms

How to Kill Bagworms

Treatment for those pesky bagworms.

There is good news about those pesky bagworm control and it is easy to get started and to maintain a strict killer instinct for these little bags of worms.  The key to this plan is early detection and using the right treatment plan based on the time of year or season.

Treat as much of the plant or tree as possible and the leaves of surrounding plants.  Having a good attack plan in the spring can keep local populations at bay.

However, if you find a large infestation late in the year, treat once every two weeks until you don’t see any more bagworms.  Late season applications won’t have nearly the effect of early springtime treatments for two reasons.

First, the young larva is much more susceptible in the spring.  They’re extra “weak” so chemical treatments have a better impact.  Treating late in the season when bagworms have reached maturity means you’re dealing with a stronger pesky pest and one that’s more protected since they will be living inside their “bag”.

Secondly, the pupae stage of bagworms is not susceptible to any treatment.  Their cocoon will protect them from chemical applications and only when they hatch out can they be affected.  For this reason, it’s important that you do multiple applications when treating late in the year.  Repeat treatments assure you’ll have good protection to get each release of female and male pupae from their bags.  Stay strong with your plan.

Since bagworms tend to hide well, they can go unnoticed when trees are green throughout the summer and fall.  But as winter arrives, their dormant bags can be easy to spot.  If you have evergreens like Leyland Cypress or some tree harboring dormant bags, treat them with DORMANT OIL SPRAY during the winter.  It will suffocate the hibernating stage and kill them before they get active the following spring.  Dormant Oil is a good choice to spray during the winter for prevention so you can be sure an ongoing problem won’t resurface the following year.

We recommend to following spray and sprayers.  If your trees are tall, it may require to use a trombone sprayer or a larger backpack sprayer like found below to get the coverage needed.


How to Kill Bagworms – Best spray for all times

During the spring, summer or fall, the strongest and best concentrate to apply is BIFEN XTS.  Its fast working and goes a long way. Bifen is oil based which enables it to penetrate bagworm bags much better compared to most any other concentrate.

Use it monthly when bagworms are first active; once they ‘re gone, treat every 2 months to make sure they don’t return. If its the middle of the summer and you have only now identified a problem, treat once a week until all activity is stopped.

Mix .15 oz of Bifen per gallon of water in any good pump sprayer for small jobs. 1 gallon of mixed material can cover up to 430 sq/ft.

For low heights 15 feet or less, our BUGSPRAY PUMP SPRAYER will be able to reach and is well suited for small jobs where 1-2 gallons of mixed material is needed. It comes with a range of spray tips including a pin stream that can deliver a laser-like spray up to 15 feet high.

For heights of 15-30 feet, a TROMBONE SPRAYER will do the job. This is a manually operated sprayer you control by “sliding” the pump you hold in your hands. It’s easy to use and will let you apply chemical exactly where you want it with laser-like precision. Its portable meaning you’ll need a bucket to hold the mixed chemical and once prepared, you can bring the solution afield making this a good option for remote locations where no direct water supply is available.

Lastly, another option is our 20 GALLON HOSE END SPRAYER. This sprayer hooks up to your garden hose and uses the water pressure of your water supply to pump out chemical from the small holding tank underneath the spray handle. This sprayer will be more “wasteful” compared to the pump or trombone sprayer but it can reach up quite high if you have decent water pressure. Basically as high as you can spray your garden hose.

Using this sprayer, you’ll want to add .5 oz of Bifen XTS to the tank and then fill it with water to the 5-gallon line. Next, hook it to your garden hose and spray the entire amount over a 2150 sq/ft of plant foliage.

Bagworms can become a problem on most any tree or plant in the yard if given the chance to survive. If you suspect you have some feeding or foraging on your property, do some spraying early in the season to minimize damage. If it’s winter when you find them, it’s just as wise to spray then to using the Dormant Oil listed above.

Find a spray and plan that you feel comfortable in using, stick with it.  You can attack these pesky pests and kill the bagworms on your property.  Be strong and stick with your attack plan.  Good luck.