German Cockroach (Blattella germanica) Life Cycle & Facts

German Cockroach (Blattella germanica) Life Cycle & Facts

Small in size and very active, Able to multiply within few days. German roaches known as one of the species of Cockroach Insect.

Cockroach known as most common pest in every part of the world. They have more than 4000 species in all over world but German Roach known as smallest roach and rapidly increase their number. Details must you know about German roach like life cycle, reproduction, Eggs, facts and how to control and treatment.

Cockroaches are among most common of insects and have been on earth for over 300 million years and considered one of the most successful group of animals because roaches are so adaptable & successfully adjusted to living with humans. Blattella germanica is scientific name of German Cockroaches.

German Cockroach
German Cockroach

Cockroach (German roach) widely distributed urban pest and most common roach species in house, restaurants, hotels and other institutions. German cockroaches are 1/2 to 5/8 inch long. They have fully developed wings but they do not fly. They are small in size but as active as large,

German Cockroaches Biology

Insect Cockroach
Species German Cockroach
Scientific name Blattella germanica
Size 10-15 mm
Color Yellowish brown
Found In most parts of the world

Details you must know about German Roach life cycle, facts, egg and reproduction. Roach have more than 4000 species exist worldwide.

Scientific Classification

  • Kingdom – Animalia
  • Phylum – Arthropoda
  • Class – Insecta
  • Superorder – Dictyoptera
  • Order – Blattodea
  • Family – Ectobiidae
  • Genus – Blattella

German Cockroach

German Cockroach Egg The female usually carries the egg case until shortly before the young come out. Their egg case (ootheca) light in colour and about 7-9 mm long and contains about 40 eggs.

Females carry ootheca until it is within 1-2 days of hatching and then deposit egg place at safe place. Average 4-8 ootheca produced by per female.

Average 30-40 eggs per ootheca. Developmental time from egg-nymph-adult gto 54 days to 200 days.

German Cockroach Egg case
German Cockroach Egg case

German Cockroach facts

  • Blattella germanica length between 10-15 mm
  • They prefer warm and humid place to survive
  • They often invade residential properties by interrupting grocery bags, cardboard boxes and second hand appliances. 
  • German cockroach most likely to found around bathroom or kitchen.
  • They feed almost everything including soap, glue, toothpaste, bathroom products and others.
  • Roach depend upon temperature, injuries and diet.
  • Early nymphal instars will not show the stripe but later it will
  • They have short life cycle and high ability to allow small infestation to increase rapidly.
  • The process to increase number through egg to nymph to adult (three phases).

German Cockroach Life Cycle 

Roaches have 3 developing stage – egg nymph and adult. German Cockroach Reproduction Female Blattella germanica produce a light brown purse shaped egg capsule 7-9 mm long and contains two rows of eggs. It contains about 30-45 eggs and produce 4-8 egg shall in total lifespan.

German Cockroach Life Cycle
German Cockroach Life Cycle

At room temp one capsule is produced in about every six weeks. After that nymph stage (6-7 instars).

  • Egg stage Primary stage of life cycle. Female produce egg case & contain 30-40 eggs.
  • Nymph stage Newborn pest grows by shedding their skin during  various instars cycle
  • Adult stage Pest fully grown within weeks to month.

German Roach Reproduction

It grows faster than any other residential roaches. Once fertilized a female roach develop egg case with her abdomen. Case have 16 segment and at first translucent and later turn white and pink. After 48 hours it attains dark brown of shell of chestnut. Winters create risks for cockroaches, which are naturally tropical creatures. They died when exposed less than 15 degree fahrenheit. 

Germanroach is one of the among domestic species & generally found near human living area. Therefore they equally capable to spread disease and spoil food.

Blattella germanica Lifespan

It have highest reproductive rate and lays about 20-40 days and 28 days as incubation period. It produce 4-5 ootheca in lifespan. These roaches go through six to seven instars before reaching maturity and takes 103 days. Mature roaches lifespan for male and female is less than 200 days.

Injury & Damage by GC produce odorous secretions that affect flavour of various food items. High number of pests may result characteristic odor in general region of infestation. Various disease spread by roaches like food poisoning, dysentery, diarrhea and other illnesses. Also skin rashes, allergic reaction, sneezing, watery eyes, asthma and other diseases also spread by roaches.

German Cockroach Infestation in grocery box, cardboard, near dishwasher, stoves, sinks and bathroom. They grows rapidly and increase their number within days.

How to control and treatment

Huge number of insect management tools and technique to control Blattella germanica (roach). They can control by chemical method, physical removal, exclusion, Baits and traps and others.

Minimize indoor trash, keep them emptied because they survive near kitchen and bathroom. Keep dishes clean, sink sustainer also clean.

Keep place of multiplication like cracks, refrigerator, stoves, behind microwaves, toster, under table, behind & under skin, electrical outlets & switch boxes.

Question – Do German Cockroach bites Humans?

Mainly roaches omnivores in nature and eat plants and meat. Also eat human flesh of both living and dead. They likely to take bite on fingernails, eyelashes, hands & feet.

Question – What happened when cockroach bite humans? 

Bite may cause irritation, swelling and lesions and some may suffered minor sound infection.

Roach (german) carry harmful bacteria for example Salmonella, E.coli on pests’ body and legs. They cause food poisoning and dysentery. fecal waste of cockroach, saliva cause allergic reactions. As a result they spread range of disease.

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