Abstract:
Pesticide chemicals have played a significant part in increasing
agricultural production and productivity. However, the continious use of pesticide
chemicals, in particularly, has not only caused death through poisoning,
accumulated in man, concentrated in food chain, but also resistance in pest
population and destroyed parasites, predators and pollinators. Organic agriculture
using natural biocontrol (Fermented Plant Extract (FPE) and EM-4) is a substitute
alternative for pesticide chemical. The use of FPE from various fresh medicine
plant have been done before. This study using dry serai (Cymbopogon citratus
DC.) and babadotan (Ageratum conyzoides L.) as FPE to assay effectiveness of
both plant that fermenting use Effective Microorganisms-4 (EM-4) and to
determine the optimum concentration and duration of immersion in FPE for repel
Crocidolomia binotalis Z. Beside that, this study had objective to determine the
acid total as lactic acid from FPE and antioxidant activity from FPE and sawi.
Experiment has been done using bioactivity test methode based on Priyono (1999)
to assay optimum concentration and duration of immersion in FPE. Concentration
variation of FPE were 0,1%, 0,2%, 0,3%, 0,4%, 0,5%, 25%, 50%, 60%, 70%,
80%, 90% and 100%. The duration of immersion in FPE were 30, 60 seconds and
60 minutes. Bioactivity test result showed that babadotan's FPE at concentration
of 100% and duration of immersion 60 minutes can repel Crocidolomia binotalis
Z. but serai's FPE can not repel Crocidolomia binotalis Z. Statistics analysis at
P< 0,05 of feeding barrier index from both of FPE did not significantly to repel
Crocidolomia binotalis Z. except babadotans' FPE at 100%. The acid total assay
of serai's and babadotan's FPE based on alkalimetric methode were 1, 8669% and
2, 4108%, respectively. The result of antioxidant activity assay in all treatment
based on Lindsey et al (2002) showed high resistance pencentage about 90-96%.
Statistics analysis at P< 0,05 of antioxidant activity assay did not significantly
difference in serai's and babadotan's FPE but significantly difference with sawi
that immersed in water.
