Lady bugs / lady beetles


At one time, this insect was viewed as beneficial insect that should not be harmed because it would feed on other pest species.  Sometime during the last twenty years of the 20th century, another species, the Asian Lady Beetle was introduced to augment the work of the native lady beetle here in the US.

Over time, the population of the Asian Lady Beetles has exploded creating problem with insects that migrate onto and into homes in the fall and sometimes in large numbers.  Although the attitude has been to leave these insects undisturbed due to their beneficial behavior, the advice is not practical when hundreds of insects invade a home.

Life Cycle

All beetles go through complete metamorphosis: egg, larvae (grub), pupae (cocoon) and adult (beetle).  There is the possibility of numerous generations of this beetle during the year, but when fall approaches in any number of temperate areas around the US, the beetles begin to migrate onto the warm, south or southwest side of building, attracted by the sunlight reflecting on the building. 

It is shortly afterward that the beetles will find their way into the walls of homes only to emerge at windows inside of the home on warm sunny days during the colder months of the fall, winter and spring to the chagrin of many homeowners.



It is recommended not to kill insects by squashing them due to the odor that is emitted by doing that.  Vacuuming the beetles off of surfaces is a better solution, but it is critical that a new bag be used or the collection canister emptied and cleaned after each capture since the beetles release a scent which may be distributed through the vacuum's exhaust into the room when the vacuum is used again.

Insecticides may be helpful when attempting to control this pest.  There are insecticides labeled to treat beetles such as bifenthrin formulations which are sold under a variety of brand names.  The products would be applied to beetle resting areas inside or outside of the home as needed.

But we are pleased to offer an alternative product that does not involve pesticides.  Lady Bug Buster is a product that is based on another product that we have sold for years, Cluster Buster.  Inside of the trap is an attractant to lure the beetles inside.  Once inside, the beetles fly into very finely ground powdered egg shell which is so light and fluffy that the insects attempting to stand on it quickly sink into it.  The particle size acts to kill the insect by blocking the breathing apparatus on insects called sphaeracles.

There is going to be disagreement over the decision to kill these insects.  One can build light traps to capture the beetles (these may be found on the web) for storage over the winter, but the average homeowner is not going to do this.  We think that the Lady Bug Buster is a reasonable alternative that can provide the homeowner with a way to help remove the beetles from the inside of their homes.

For those that prefer not to kill the beetles, beetle traps can be constructed to capture the beetles unharmed and maintain them through the winter.  Instructions may be found at a number of web sites.  

We have another solution, an insect repellant called Outlast NBS-30 which is derived from a variety of plant oils and can be mixed with water, paint or stain.  When applied with water, the product repels the beetles for about a week.  If mixed into paint or stain, its repelling properties last for two years or longer.  Targeting the areas where insects return year after year may be a good control strategy.

We Invite Questions

The Bug Clinic has a tradition of answering questions free of charge.  Our commitment is to provide information so that the consumer may make an educated assessment of their problem.  We have many satisfied customers that have learned about their particular pest problem and purchased related products to help solve them it.  There is no obligation to purchase.

You may send us an E-Mail or call us toll free at 800-433-1128 within the US and Canada or 845-356-2837 locally or internationally.