AKTIVITAS ASAP CAIR TEMPURUNG KELAPA SEBAGAI INSEKTISIDA

This study aimed to determine the toxicity liquid smoke of coconut shell to N. lugens and its impact on rice seedlings. The method used was the efficacy under laboratory conditions. Firstly preliminary test of 100% liquid smoke to N. lugens was compared with chemical insecticides, and distilled water. Secondly, liquid smoke was made to be eight series of concentration namely 0, 1.56, 3.125, 6.25, 12.5, 25, 50, 100%. The tretment of eight concentration rates was repeated three times. Each concentration requires 20 third instar-nymphs, replicates three times. The liquid smoke of coconut shell were exposed to test insects directly and indirectly. Mortality of test insect was observed at 24, 48, 72 hours after application and the mortality data were used for analysis of LC50. The results of the study showed that liquid smoke of coconut shell proven highly toxic to N. lugens and phytotoxic against rice seedlings at pH 1.83 with a concentration of 6.25% and at a pH of 6.33 with a concentration of 25%. LC50 value of the liquid smoke of coconut shell at 24, 48, and 72 hours after application against N. lugens on direct exposure to pH 1.2 were 24.77, 16.36, 9.75% respectively, and on indirectly 32.75%, 22.84%, 18.63%, and on direct exposure to pH 6.46 were 11.94, 10.73, 9.94%, and on indirectly exposure were 36.36, 27.99, 26.15% respectively