concentrations were 0, 10, 100, and 1000 μg/mL in 
sea water. When the ethanol extract insoluble added 
2 drops of DMSO (dimethyl sulfoxide 0.2%). There 
were three (3) replicates in each concentration. A 
control test was also prepared. 
2.6 Procedure of Toxicity Test Methods 
using BSLT 
The seawater was put in a small plastic container 
(hatching chamber) with a partition for dark 
(covered) and light areas. Shrimp eggs were added 
into the dark side of the chamber while the lamp 
above the other side (light) will attract  the hatched 
shrimp. Two days were allowed for the shrimp to 
hatch and mature as nauplii (larva). After two days, 
when the shrimp larvae are ready, 4 mL of the 
artificial seawater was added to each test tube and 10 
brine shrimps were introduced into each tube. Thus, 
there were a total of 30 shrimps per dilution. Then 
the volume was adjusted with artificial seawater up 
to 5 mL per test tube. The test tubes were left 
uncovered under the lamp. The number of surviving 
shrimps were counted and recorded after 24 hours. 
Using probit analysis, the lethality concentration 
(LC
50
) was assessed at 95% confidence intervals. 
LC
50
 of less than 100 μg/mL was considered as 
potent (active). As mentioned by Meyer and others, 
LC
50 
value of less than 1,000  µg/mL is toxic while 
LC
50
 value of greater than 1,000 µg/mL is non-toxic. 
The percentage mortality (%M) was also calculated 
by dividing the number of dead nauplii by the total 
number, and then multiplied by 100%. This is to 
ensure that the death (mortality) of the nauplii is 
attributed to the bioactive compounds present in the 
plant extracts. 
Observations were made after 24 hours to calculate  
the percentage of mortality shrimp larvae A. salina. 
Mortality data are used to calculate the value of 
Lethal Concentration 50 (LC
50
). After 24 h of  
incubation,  the vials were observed using a 
magnifying glass and  the number of survivors  in 
each vial was counted and noted. From  this data,  
the percentage of mortality  of  the  nauplii was  
calculated  for  each concentration and LC
50
 values 
with 95% confidence  limits were determined using 
Probit analysis Finney (Meyer, 1982). 
 
3    RESULTS AND DISCUSSION 
The Brine  Shrimp  Lethality Test (BSLT)  
represents a  rapid, inexpensive and simple bioassay  
for  testing plant extracts bioactivity which  in most  
cases  correlates  reasonably well with  cytotoxicity  
and  anti-tumor  properties (Krishnaraju, 2005). 
Presently  there  is an  increasing  interest world 
wide  in herbal medicines accompanied by  
increased  laboratory investigation  into  the 
pharmacological properties of  the bioactive  
ingredients  and  their  ability  to  treat  various 
diseases (Lobo, 2009).  
Toxicity tests of crude ethanol extract of Drymis 
piperita,  Myrmecodia beccarii,  Biophytum 
petersianum,  Vernonia amygdalina  Villebrunea 
rubescens,  Laportea aestuans and  Breynia cernua 
conducted to determine the level of toxicity of the 
extracts against larvae shrimp A. Salina. The test 
results showed that seven ethanolic extracts from 
Papua were potent cytotoxic activity because the 
LC
50 
value less than 1,000 µg/mL that at different 
concentration levels will have an impact on 
mortality and larval toxicity of this case is shown in 
Table 1.  
Based on results, mortality of A. salina in ethanol 
extract of plant M. beccarii showed  the highest 
potential cytotoxic activity with low LC
50 
value with 
8.33 µg/mL with minimum concentration (10 
µg/mL) can reach 50% mortality after 24 hours of 
treatment.  Mortality of A.salina in ethanol extract of 
L. aestuans,  V. rubescens and D. piperita showed 
high mortality with LC
50 
34.95;  61.82 and 79.59  
µg/mL respectively. Then, the cytotoxic activity for 
B.cernua  (255.76 µg/mL), B. petersianum (463.61 
µg/mL) and V.amygdalina  (865.58 µg/mL)  showed 
active cytotoxic effect with LC
50 
more higher than 
another plant extracts. But, all plants extracts from 
this research showed the active potential activity 
Toxicity testing results of crude extracts showed the 
percentage of A. salina larvae mortality increased 
along with the increase in concentration of the 
extract. The results reveal that crude ethanol plant 
extract of M.beccarii showed that the compound 
contained therein are active and possess a high 
bioactivity, which means that at low concentrations 
has toxic and lethal larvae of A. salina.  M.beccarii 
has been reported to have high potential antioxidant 
activity (Dirgantara, 2013) with several active 
compunds such as flavonoid, tanin and 
triterpenoid/steroid (Dirgantara, 2015). 
Results from this study indicate that while plant 
species with LC
50
 values < 1000 μg/ml may used for 
local wisdom community, this study calls for further 
work aimed at isolating the cytotoxic compounds 
responsible for the observed activity and to search 
new compound for anticancer therapy.