Antibacterial Properties of Plants— BUSHNELL, et al. 
Ill 
TABLE 4 
Extracts Which Exhibit Moderately Effective Antibacterial Properties 
(with zones of inhibition between 10 and 20 mm. in diameter) 
NAME OF PLANT . 
PART OF PLANT 
PROVIDING EXTRACT 
pH 
OF EX- 
TRACT 
DIAMETER OF ZONES OF 
(IN MM.) 
M. 
pyogenes E. coli 
INHIBITION 
Ps. aeru- 
ginosa 
Psilotum nudum 
whole plant 
5.2 
15 
0 
8 
Nephrolepis bis err at a 
stems 
5.1 
12 
0 
0 
Cibotium Chamissoi 
leaflets 
4.6 
14 
15 
12 
buds (of leaves) 
5.2 
10 
0 
8 
Preycinetia arborea 
stems 
5.8 
11 
0 
0 
Allium fstulosum 
whole plant 
4.3 
10 
8 
10 
Alpinia purpurata 
stem 
5.9 
10 
12 
15 
Artocarpus incisus 
male and female 
flowers 
6.3 
0 
11 
not tested 
Bryophyllum pinnatum 
bark 
5.2 
0 
8 
10 
leaf 
4.8 
0 
8 
10 
Acacia Koa 
true leaves 
5.5 
13 
0 
0 
phyllodes 
5.6 
16 
0 
0 
Tamarindus indica 
leaves and stems 
3.8 
12 
0 
not tested 
Aleurites moluccana 
leaves and stems 
5.8 
10 
0 
0 
flowers 
5.0 
10 
0 
0 
leaves only 
6.4 
10 
0 
0 
Euphorbia pulcherrima 
floral parts 
5.1 
0 
0 
12 
leaves and stems 
5.5 
0 
0 
12 
Euphorbia Milii 
leaves 
4.9 
10 
0 
0 
stems 
5.6 
10 
0 
0 
Euphorbia Tirucalli 
stems 
4.5 
15 
8 
8 
Mangifera indica 
leaves 
5.2 
12 
? ( discolored ) 
not tested 
bark and stems 
4.8 
11 
? (discolored) 
not tested 
fruit, small, green 
3.5 
18 
16 
not tested 
fruit, half-ripe 
3.2 
13 
15 
9 
P assi%or a sp. 
leaves and stems 
6.1 
12 
10 
0 
Punica Granatum 
fruit, seeds * 
3.8 
14 
0 
11 
Terminalia Catappa 
leaves and stems 
4.8 
18 
0 
0 
Eucalyptus sp. 
leaves and stems 
4.8 
13 
0 
0 
Eugenia Cumini 
leaves 
5.0 
17 
12 
0 
stems 
5.0 
15 
0 
0 
buds and flowers 
4.5 
15 
0 
0 
Eugenia malaccensis 
leaves * 
3.4 
12 
11 
11 
fruits ( without seed ) 
4.5 
14 
18 
0 
Metrosideros macropus 
leaves and buds 
4.3 
18 
17 
18 
Psidium Guajava 
fruit* 
3.5 
18 
16 
not tested 
Ipomoea Batatas 
stem 
6.7 
18 
0 
not tested 
Solanum nodiflorum 
green fruit 
4.6 
0 
0 
10 
ripe fruit* 
4.7 
0 
0 
18 
leaves and stems 
5.8 
10 
10 
0 
Solanum sodomaeum 
leaves 
5.6 
10 
0 
0 
stems 
5.6 
10 
0 
0 
fruits 
5.1 
10 
0 
0 
Plantago major 
whole plant* 
5.5 
11 
10 
not tested 
Morinda citri folia 
ripe fruit* 
4.4 
15 
10 
15 
Scaevola Gaudichaudiana 
stems 
5.9 
16 
0 
0 
fruits and flowers 
5.7 
13 
0 
0 
Bidens pilosa 
whole plant* 
5.8 
15 
15 
12 
* See Table 6. 
