Aplikasi Piriproksifen (Insect Growth Regulator) Terhadap Proses Perkembangan Lipas Jerman, Blatella germanica (Dictyoptera: Blatellidae)

Abstract

Pyriproxyfen is a chemical compound widely used as an insect growth regulator (IGR), included in the juvenile hormone analog insecticides (JHA) group. This study aims to analyze the effect of pyriproxyfen application on the development process of Blattella germanica. The method used is direct spraying using a flairosol tool on cockroach nymphs. The concentrations used are 0 (control), 150 ppm, 300 ppm, 600 ppm, and 1200 ppm. The nymphs treated consisted of two groups: the 2-3 instar group (N2-N3) and the 4-6 instar group (N4-N6). Five nymphs were used, with five replications for each treatment and concentration of pyriproxyfen. The results showed that applying pyriproxyfen to both groups of B. germanica nymphs with various concentrations had a longer average life span (days). The longest average life span (167.7 days) occurred in the early nymph and late nymph groups (103.5 days), each at a concentration of 300 ppm. The highest mortality rate (80%) in the early nymph group occurred at a pyriproxyfen concentration of 600 ppm, while in the late nymph group (60%) at a concentration of 1200 ppm. Applying pyriproxyfen to B. germanica nymphs caused various morphological abnormalities in the adult stage in abnormal wings, melanic and supernumerary.