Cockroaches Control
Cockroaches, hiding in the daytime ,crawl in the kitchen in the dead of night .Residual spraying of insecticides is an efficient control method of crawling insects including cockroaches.
The residual spraying involves the spray of an insecticide along routine pathway of cockroaches in the nighttime, such as bottom edges of wall. It brings the effect to control the crawling cockroaches by their contact to residue of insecticide.
The life cycle of cockroaches is devoid of pupae period, but goes through with direct metamorphosis from nymph to adult after several moldings.
Principal species of Cockroaches
 |
 |
 |
 |
|
|
B. germanica |
B. orientalis |
p. fuliginosa |
Periplaneta americana |
Species |
|
20 mm |
35 mm |
33 mm |
50 mm |
Body length |
|
33 c |
20 - 29 c |
30 -33 c |
30 c |
Optimum Temp |
|
17 – 35 days |
37 – 81 days |
37– 47 days |
29 – 58 days |
Egg sheath period |
|
90-105 days |
290- 421 days |
218-239 days |
155-240 days |
Life cycle |
|
98-182 days |
35-182 days |
296-301 days |
105-588 days |
Longevity of female adult |
|
Ca. 2000 eggs/year
|
Ca. 200 eggs/year |
Ca. 300 eggs/year |
Ca. 800 eggs/year |
Number of eggs |