german roaches


The German cockroach (Blattella germanica ) is one of the most common roaches found in apartment houses, restaurants, and hotels. German roaches can be a severe health hazard in restaurants.

How Did I Get German Roaches?

German cockroaches (eggs included) are brought inside or hitchhike on man's belongings, luggage, boxes, or packages. All it takes is bringing in one egg capsule, and in six months, you will have an infestation.

Before starting any German roach treatment plan, sanitation measures are critical. These roaches prefer moisture, food, and warmth. These smaller light-brown roaches are seen mainly in kitchens and bathrooms; they usually are spotted at night.
If you see these types of cockroaches during the day, there is a substantial infestation present.

These roaches also leave excrement droppings that look like black pepper. It is helpful to take note of the excrement location to treat in these areas; however, remove it with a vacuum cleaner as soon as possible. The bacteria from these excrement droppings may trigger asthma and allergies.

german roach kitOne of The best ways to get rid of German Roaches is place out a high quality roach bait like Invict Gold to kill the adult German roaches and an insect growth regulator (IGR) like Gentrol Point Sourcesto stop the reproduction of roaches. We have both products in a kit , Invict Gold Roach Kit for savings.

german roach spray kitFor those who prefer to spray, use German Roach Spray Kit. It combines Advion WDG insecticide with Tekko Pro IGR (Insect Growth Regulator). After spraying this liquid combination into cracks and crevices, use the Stryker 54 aerosol to flush out the hiding roaches on the recently sprayed surface.


Where German Roaches Are Found

Kitchens and bathrooms are the main habitats for German roaches. German roaches will stay close to water and food sources.

A large German roach population will produce a foul odor. German roaches find shelter in the warmth of electrical appliances and wiring. Look for these roaches behind and under major appliances and devices in the kitchen. Sanitation is the first step in German roach treatments; they eat leftover food in your sink and countertops. German roaches will be around garbage containers and behind kitchen cabinets.

If this roach population is large enough, they will spill over to other rooms. These roaches are mostly active at night. If German roaches are seen active during the day, it most likely is due to overcrowding in their hiding places or a shortage of food and water supply.

Cracks and crevices are their harborage areas; they spend about 75% of their time in such harborages. First instar nymphs require a crack of about 1/32" whereas, adults require an inch width. German cockroach nymphs are smaller than most other cockroaches; thus, they can conceal themselves in many places and remain protected.

How German Roaches Enter A Building

The German cockroach can move well within a building. These roaches also can travel from a neighboring apartment or location to another and can pass through small openings like light switch plates. They are often brought in with grocery items, grocery bags, cartons, handbags, and luggage. Inspect all potential harborages to determine if you brought any German roaches inside in your belongings. Locate and treat these harborages.

German roaches may scatter from one area to another after a repellent insecticide application. We recommend only using non-repellent insecticides in German roach treatments.

It may not be possible to eliminate all the German cockroaches in a building entirely if a consistent supply of cockroaches come into the premises via packages or food shipments.



German Roach Control & Treatments

German Roaches & Sanitation

When beginning your German roach control program, sanitation is one of the first things to consider. German roaches only need a small amount of food to sustain them.

  1. Remove indoor trash or keep them emptied.
  2. Keep trash dumpsters clean.
  3. Make sure food is not left in sink strainers and frequently run the garbage disposal.
  4. Seal food containers.
  5. Keep dishes clean, no residue of food remaining.
  6. All kitchen appliances (microwaves, toasters, ovens, refrigerators, and stoves) should be maintained in a clean condition so that it is free of food and grease.
  7. Pick up all pet food.
  8. Do not leave food out in the open.
  9. Sweep or vacuum food particles or crumbs.
  10. Get rid of empty soft drink bottles, paper bags, and cardboard boxes.

Inspection : Look for Evidence

When inspecting for German cockroaches, thoroughness is very important. It is important to place the baits and IGR's or insecticides as close to their runways and harborages as possible.

german roach feces Their excrement looks like black pepper.

German Roach egg cases (Oothecae)

(Photograph by James Castner, University of Florida.)

Look for German roach evidence, inspect german roaches

A flashlight would be a handy tool to inspect evidences of German roaches the following places.

  1. Cracks and Crevices
  2. Behind and under refrigerators
  3. Behind and under stoves
  4. Behind and under microwaves and toasters
  5. Under tops of tables
  6. Behind and under sinks
  7. Cabinets-corners and cracks and crevices
  8. Motors of refrigerators and soft drink dispensing machines
  9. Switchboxes and electrical outlets
  10. Under and behind cafeteria counters and soda fountains
  11. Cash registers
  12. Telephones
  13. Vegetable bins
  14. Recycling bins
  15. Meat counters and check-out stands
  16. Meat cutting blocks
  17. Anywhere else conditions are favorable.
  18. Every situation may be different, inspect all places with favorable conditions.

German Roach Control Measures

First inspect in all the areas listed under inspection and follow sanitation recommendations.

When beginning your German roach control program, sanitation is one of the first things to consider. German roaches only need a small amount of food to sustain them.

We recommend using gel baits, non-repellent insecticides, dust baits, roach bait stations, insect growth regulators (IGR), select dusts and roach pheromone traps for residential and commercial areas.

Very often, high levels of control can be achieved by baits alone for the typical homeowner. Several very effective bait products are on the market today. However, like any chemical control, resistance to the ingredients in baits can occur. The products we recommend have not had a resistant problem. Rotate baits for locations with a continued problem.

  • Insecticides do not control German roaches well unless you use non-repellent insecticides such as Advion WDG. The roaches can not detect the presence of a non-repellent insecticides, so it has a chance to work. For best results, combine with an IGR like Tekko Pro.
  • Gel baits have quicker results than bait stations. The top recommendations are Invict Roach Bait Gel or Vendetta Roach Bait Gel. Bait Stations are perfect for ongoing maintenance after the use of gel baits. The top product recommendation in the roach bait station category is Advion Arena Roach Bait Stations.
  • A flowable bait, such as Avert Dry Flowable is a long lasting dry formulation. Apply it in areas where you can not reach to apply a gel bait.
  • IGRs (Insect Growth Regulators) reduce the ability to reproduce. You may apply IGRs with any bait or any insecticide without conflict. Tekko Pro or Gentrol IGR Point Sources are the top recommendations among all of the insect growth regulators.
  • Do not apply repellent insecticides( liquids or dusts) near gel baits or bait stations; they would contaminate them.
  • Commercial kitchens and restaurants may be an exception of using just roach baits.

For German Roach control in restaurants we recommend the use of insecticides, aerosols, dusts, and insect growth regulators instead of baits. There is too much competing food sources for effective control of german roaches in restaurants with bait.

Click here: Roach Bait Gel Placement Tips


German Roach Spray Kit

german roach spray kit This kit combines a non-repellent insecticide called Advion WDG with the top rated IGR, Tekko Pro. After spraying cracks and crevices, use Stryker 54 as a flushing aerosol. Pest management professionals call this procedure, using a flushing aerosol as a "clean-out" step.

German Roach Spray Kit



Roach Bait Gel Kits

Invict Gold Roach Gel Kit

This kit contains Invict Roach Bait with Gentrol Point Sources for the best combination for German roach control, it kills the adult population and prevents new births. InVict Gold Cockroach Gel rapidly kills roaches with its bait matrix of 11 food attractants as a lure. It is known to maximize roach control and fight against bait aversion.


german roach kit

  1. Invict Gold Cockroach Bait Gel -Box of 4 x 35g syrings + 1 plunger
  2. Gentrol Point Sources-5 disks

Ultimate Roach Gel Kit

This Ultimate Roach Kit contains Invict Roach Bait Gel, Tekko Pro IGR, Invade Bio Zap, Trapper 2600 Glue Boards and Insect Bait Stations (to hold the Invict Gold Bait Gel) as a complete combination to ensure your success in treating German roaches.

  1. Invict Gold Cockroach Bait Gel-Box of 4 x 35g syrings + 1 plunger
  2. Tekko Pro IG-4 oz
  3. Invade Bio Zap-32 oz
  4. Trapper Monitor Glue Boards (3 boards-9 traps)
  5. JF Oakes Insect Bait Stations ( 6 bait stations to hold the Invict Roach Bait Gel)

Use Invade Bio Zap (a ready- to- use spray) to sterilize areas where the roach feces have dropped. Invade Bio Zap is also a probiotic formula (biodegradable and non-pathogenic) that removes stains and odors. It as a citrus scent.

Vendetta Roach Bait-Gentrol Point Source Kit

This kit combines the Vendetta Roach bait comes with the insect growth regulator, Gentrol IGR. Vendetta Roach Bait has both proven to be extremely effective on German Roaches. Vendetta Roach bait quickly and effectively kills hard-to-kill cockroaches. Vendetta roach bait, with Abamectin B1 0.05%, attracts both bait-averse and non-averse cockroaches.

vendetta roach kit

  1. Vendetta Roach Bait-Box-4 (30) gram syrings, 1 plunger
  2. Gentrol Point Source IGR-5 discs


Invict Gold, Alpine, Advion and Vendetta Roach baits have great roach bait acceptance and are superior to other professional roach baits on the market with some very quick results.

Click Here: Cockroach Baits

alpine gel bait piston can

Alpine Cockroach Gel Bait Piston Can

Alpine Cockroach Gel Bait in a piston can. This can is the best of both worlds, the convenience of spraying, but in a gel bait form. Contains the reduced risk insecticide Dinotefuran. It is free of the Big 8 Allergens

Roach Dust Baits

Avert Dry Flowable Cockroach Bait
Remains effective for more than one year after initial treatment.
The dry formula reaches void areas that gels and bait stations cannot reach.

Avert Dry Flowable Bait Placements

  • Avert Dry Flowable is intended for application with the provided crack and crevice bait extension tube. Apply insecticide directly into cracks and crevices.
  • Apply lightly and uniformly to infested areas.
  • Pay particular attention to cracks and crevices and hidden surfaces around sinks and storage areas, behind baseboards, around doors, and windows, behind cabinets, stoves, and behind refrigerators.
  • For compete application instructions, please read : Avert Dry Flowable Product Label.

Roach Bait Stations

advion roach bait arena

Advion Arena Roach Bait

Advion Roach Bait Arena (60 ctn)

Use Advion cockroach bait arena to control cockroach populations indoors and outdoors with the active ingredient indoxacarb, an insecticide that acts through ingestion by cockroaches. These bait stations do not work as quickly as the roach bait gels, but they do not dry out. It would be perfect in maintenance situations

Where Do I Place These Baits?

Typical harboraging areas for German Roaches and places for treatment of Roach Bait

  1. German roaches will exist under favorable conditions of food, water or warmth.
  2. Before treating any area, it is best to first take a flashlight and check areas for harborage sites. Look for their excrement droppings (looks like black pepper).


Suggested Bait Placements

Cracks and crevice placement, as opposed to placement on exposed surfaces is preferred because roaches do not travel far from their harborage. These precise placements result in better control because you have placed it in areas that the roaches spend most of their time.

  1. Behind kitchen cabinets and counter tops.
  2. Behind anything hanging on the wall, such as pictures, clocks, posters, etc.
  3. Behind, next to, and under the stove.
  4. In the corners up under the sink and other cabinets.
  5. In stored paper bags and boxes.
  6. Around pipes, cords, and cables that come out of the wall.
  7. Behind and under bathroom fixtures.
  8. Behind the medicine cabinet and vanity.
  9. In any cracks or crevices around shelves or wood trim.

Roaches are cannibalistic and will eat other dead or dying roaches.
The roaches are not social insects like ants and termites, they do not carry the bait back to feed the young. The bait is passed through by excrement or eating the dead roaches.

It is important to re-bait in the areas where the the roaches are taking the bait. Paying attention to this will speed up the treatment.

Click here: Roach Bait Gel Placement Tips

What are Insect Growth Regulators?

  • Using insect growth regulators break the roach growth cycle.
  • Tekko Pro stops the reproduction and reduces the survival of the German roach with two different modes of action. It effects the molting process, making the German roach vulnerable to survival and it stops it at the larvae state.
  • Our top recommendation is the Tekko Pro

Tekko pro

  • Tekko Pro
    Tekko Pro IGR has changed the industry of Insect Growth Regulators. It has two different active ingredients to provide two different modes of action to combat the most severe german roach populations. There have been reports of the complete elimination of the German roach population inside of two weeks when used alone. Combined with the Invict Roach Gel, Vendetta Roach Bait, or Advion WDG non-repellent spray provides the greatest impact.
  • Comes in 4 oz and 16 oz containers.
  • 1 pint yields 16 gallons. Mix 1 oz of Tekko Pro per gallon of water, per 1,500 square feet.

gentrol point

Gentrol Point Source

  • Gentrol Point Source is an insect growth regulator in a discreet, non-spray formulation.
  • Gentrol Point Source is a unique device that contains the Gentrol Insect Growth Regulator (IGR) hydroprene for 90-day control of roaches and other stored product pests. Gentrol Point Source covers 75 square feet. All the benefits of an insect growth regulator in a discreet, non-spray formulation.

gentrol aerosol

Gentrol IGR Aerosol : Dissipating foam assures complete coverage. 16 oz. can cover 1200 sq.ft of surface area.

gentrol igr

Gentrol IGR

  • Gentrol IGR Liquid Concentrate is an insect growth regulator.
    Prevents developing roaches from reaching sexual maturity; by inhibiting their growth
  • Comes in 1 oz bottles/10 bottles per box
  • Each bottle makes one gallon of finished product.

How do I use insecticide dusts for German roach control?

The key to insecticide dust application is to use a minimal amount, applying it in a thin layer. It should be hardly visible to the naked eye and never applied to open areas. Dust under and around appliances. If you apply dust in heavy applications, the German roaches will walk around the pile or accumulation of dust. Use a hand-held duster for accurate dust placement. Only fill the duster half full when dusting. You want airspace on the top of the dust container to shake it and puffed out more easily. It is helpful to place a couple of pennies inside the dusting container to break up clumps of dust. Applying insecticide dust with a spoon is insufficient.

  • Dust should only supplement any insecticide of a bait control program for German roach control, not as a stand-alone solution.
  • Sometimes, bait alone will not be sufficient for roach control. Restaurants will need a good dusting/liquid insecticide program because baiting will not work.
  • Those that live in apartments might benefit from dusting behind the plumbing area under their sinks and electrical outlets for long-term management..
  • When you apply them to recessed and dry areas, they give you long-lasting results. Typical areas to dust would be electrical outlets, so a hand duster with a plastic tip would be needed.
  • Do not place these dusts in the same location of any roach baits, as it would contaminate the baits.


cimexa dust

  • CimeXa Dust
    The CimeXa dust is an excellent dust made of silica gel.
  • It is very safe, lasts up to 10 years undisturbed, and acts as a desiccant. It dries up the insect.
  • It is so fine, that a hand duster is necessary for application.

boric acid dust

J.T Eaton Boric Acid Dust

  • This dust is particulary helpful as a mop solution in restaurants. Can be used as a dry dust or wet mop solution.
  • 99.0% Orthoboric Acid

d fense dust

D-Fense Dust D-Fense Dust is a ready-to-use insecticide dust that gives an effective knockdown and residual control of up to 8 months if undisturbed. This dust will contaminate any roach bait gels. Do not apply this dust in the same location as the roach gel baits.

B&G Dust-R Duster #1150

The B&G 1150 Dust-R Bulb Duster comes with plastic extension tubes that provide safe crack-and-crevice applications around electrical outlets.

What are the purposes of roach traps?

Roach traps not only trap roaches but serve as monitoring tools. Place these low profile traps under cabinets and kitchen appliances. If possible, place them out of view, but close to the roach activity. We recommend placing roach traps flush against surfaces for greater success in trapping. You only trap half as many roaches if the trap is even 3/4 inch from the wall.

victor model 330

Victor Roach Pheromone Trap #330

  • Catches roaches by pheromones and a food scent.
  • The 330 has been designed with 3 entry points, a silicone surface to prevent escapes and a low profile to fit into small, tight corners.

victor pheromone trap 327

Victor's Pheromone Trap Model M327

  • Catches roaches by pheromones and a food scent.
  • The M 327 has multiple access points, two catch areas, and patented roach pheromone attractant provide twice the trapping power and catch of the leading competitive monitors

Insecticide Aerosols to Get Rid of Roaches

Spectre PS is the top recommendation in the aerosol category. It provides a long residual and is a non-repellent insecticide.  As a non-repellent insecticide, the insects cannot detect its presence, allowing the insects to cross over its chemical placements, instead of avoiding the area.

Sprectre Aerosol may be used with roach baits and will enhance your German roach control.

German Roach Control in Restaurants

Many times, german roaches in restaurants require insecticides as opposed to baiting. Using baits in German roach control requires that there are no competing food sources. In restaurants, it is almost impossible to eliminate all competing food sources.s.

Top Recommendations

  • In restaurants, you may have to still spray with a non-repellent residual insecticide such as Alpine WSG. You can also use roach baits and aerosols like Spectre PS in commercial kitchens.
  • Use Alpine WSG by itself or combined with roach baits. Alpine WSG will not conflict with the roach baits.
  • Use Tekko Pro IGR mixed with Alpine WSG insecticide to stop the reproduction.
    We encourage you to call us for recommendations, in that we have had a long history of helping restaurants solve their problem, but needs to be handled on a individual basis.

The Commercial German Roach Kit combines several products together for savings and is optimized for commercial kitchens and restaurants or for property management. .

Another product that is recommended for restaurants is Eaton's Boric Acid Powder Eaton's Boric Acid Powder may be applied as a mop rinse insecticide that leaves an odorless, invisible residue which cockroaches cannot detect.

German Cockroach Identification

Adult German Roach Adult German roaches range in size from 1/2 inch- 5/8 inch long. They are light to medium brown. They have an oval shape that is flattened and long antennae. They have two distinctive dark stripes behind the head.

German cockroach, Blattella germanica, Photo credit: Gary Alpert, Harvard University,

German Roach Identification

German Roach

Adult length: Maximum of 1/2 inch

Color: Adults are pale brown. The nymphs are darker, almost all black. They have dark stripes behind the head.The male is light brown and has a slender abdomen. The

Pronotum: Two longitudinal dark stripes. The pronotum is the shield-like plate on top of the thorax.

Wings: Both sexes are winged, but do not fly. They prefer to run.

The immature young German roaches (nymphs) are smaller than adults and do not have wings. These immature roaches have a light stripe on their backs and are darker in color.

If you are unsure if you have German roaches, place sticky traps such as Victor Pheromone Traps #327RPT on the kitchen counters at night and take a picture.Victor 327 Send email with the picture attachment and we will be glad to help you with identification.

German Cockroach Diet

These roaches will eat a broad range of foods and prefer to stay close to food and water sources.

Habits and Biology of German Cockroaches

Biology-Adaptability and Survival

Females produce one egg capsule every 3-4 weeks. Each capsule contains 25-45 eggs, the largest capsule of all roach species that would infest a building. The female will carry the egg capsule with her until it is ready to hatch, making it less hazardous for the nymph to survive. The female German roach also has the shortest period to develop from hatching until sexual maturity. The populations of German cockroaches will build up faster than other species. The young (nymphs) will be able to breed in as little as 36 days. A combination of these traits produces what entomologists call a "high reproductive potential."

Adult German roaches can live up to one year. They adapt quickly to changing environments, and evolve to survive.

Pathogens and Diseases German Roaches

German roaches can trigger asthma, allergies, and eczema, particularly in young children. The bacteria that they carry and transmit may cause food poisoning and intestinal diseases such as dysentery and diarrhea. Since German roaches will feed on both human and roach feces, they can spread germs. As the roach travels over food and utensils, they carry diseases on their legs and bodies. The roach excrement and cast skins carry allergins that may result in allergic responses such as rashes, watery eyes, sneezing, and congestion.