author(s)
Myrul Islam

abstract
The effect of boric acid on German cockroach is studied in 2016 at Dehradun. It was studied that how boric is effect on German cockroach over time. Boric acid can be used as an antiseptic for minor burns or cuts and is sometimes used in dressings or salves. Boric acid is applied in a very dilute solution as an eye wash. Dilute boric acid can be used as a vaginal douche to treat bacterial vaginosis due to excessive alkalinity, as well as candidiasis due to non albicans candida¹. The German cockroach occurs widely in human buildings, but these are mostly associated with hotels, kitchen, restaurants, and nursing homes (Hospital) and in cold climates, they occur only near human dwellings, because they cannot survive severe cold. However, though they would soon die in the outdoors on their own, German cockroaches have been found as inquilines of human buildings as far north as Alert, Nunavut. German cockroaches produce odorous secretions that can affect the flavor of various foods. When the cockroach’s populations are high, these secretions may result in a characteristic odor in the general region of the infestation ^[2-4]. Disease-producing organisms such as bacteria, protozoan, and viruses have been found on cockroach bodies. German cockroach, which is easily available in every household of Dehradun was taken for experimentation. For this purpose, 84 cockroaches were collected and divided into 3 groups. Each group contains 7 cockroaches. These cockroaches were exposed to three forms of boric acid- solid+ flour, water, at different concentration - 25%, 50% and 75%. It was observed that at 25% concentration in all 5 forms, the cockroach mortality rate is quite low; but with increase in concentration of boric acid the mortality increase. Highest mortality was reported at 75% concentration of boric acid. So, in this way boric acid is quite effective in control of these dreadful species of Phylum Arthropod ^[7].