EFFECTS OF HYDROPONIC FERTILIZER ON IMMATURE DEVELOPMENT, SURVIVAL, AND MORTALITY OF CULEX QUINQUEFASCIATUS (DIPTERA: CULICIDAE)

• Main Author: Farica Ajiwibowo, Amanda
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/46775
• Institution: Institut Teknologi Bandung

Urban farming has become a means of farming that is used widely by urban residents due to it able being done on limited land. One form of urban farming that is commonly applied is the hydroponic system. A hydroponic system which use water and liquid hydroponic fertilizer (NPK) as a planting medium may become a nest for mosquito vectors of endemic diseases in Indonesia. For example, the Culex quinquefasciatus which is a vector of filariasis. Based on this matter, this study aims to see the impact of liquid NPK fertilizer use on the development and mortality of Cx. quinquefasciatus. In this study 5 different concentrations of liquid NPK fertilizer were used, namely 130 ppm, 650 ppm, 1300 ppm, 2600 ppm, and 0 ppm (control) with 5 repetitions for each concentration. At each repetition for each concentration 25 instar larvae 3 were used, with the total of 625 larvae. Every stage of larval life from instar 3 to adult were observed every 24 hours until all adult mosquitoes die. The statistical methods used are ANOVA, Kruskal Wallis, and Spearman's rank correlation. The results showed that there was a significant impact of fertilizer concentration on larval and pupae survival, as well as mortality from Cx. quinquefasciatus. The concentration of fertilizer at 130 ppm, 650 ppm, 1300 ppm, 2600 ppm and control produce larval survival of 99.2, 99.2, 89.6, 54.4 and 96% respectively, and pupal survival of 92.63, 90.40, 72.65, 54.76 and 89.6% sequentially. Mortality at the concentration of 130 ppm and 650 ppm resulted at 8 and 11.2%, while at the concentration of 1300 ppm and 2600 ppm resulted at 33.6 and 71.2%. There were no significant impact of the concentration treatment on the immature developmental time and adult longevity of Cx. quinquefasciatus. The correlation between concentration on larval survival and pupae showed a negative correlation, while the correlation between concentration and mortality showed a positive correlation. This study shows that the use of liquid NPK fertilizer at concentrations of 1300 and 2600 ppm can increase mortality and reduce the survival of larvae and pupae, while concentrations of 130 and 650 ppm can reduce the mortality of Cx. quinquefasciatus mosquitoes.