426 The Philippine Journal of Science 1921 
6 
Leaf miner; Phyllocnistis citrella Stainton. The leaf miner 
may cause much loss, especially on young nursery trees. The 
miner seems to prefer the young leaves. Badly attacked young 
leaves are stunted, wrinkled, and rolled up. On older trees 
the effect is not so noticeable. The insect may spread canker 
infections. The leaves of the various Loranthus species may 
also be attacked. 
Scale insects. Scale insects may be present in abundance 
on stem, leaves, and fruit of pummelos. The following have 
been indentified: Chrys omphalus aonidium (Linn.), C. aurantii 
(Mask.), Coccus hesperidum (Linn.), Lepidosaphes gloverii 
(Pack.), Parlatoria brasiliensis sp. nov., P. ziziphus (Lucas), 
Pseudaonidia trilobitiformis (Green), and Saissetia sp. 12 An 
examination of fruits in storage, showed that of 37 only 2, or 
.05 per cent, had been attacked. 
Termites; pluag. Termites do some damage by eating the 
roots. No serious losses are produced. 
SALTING AND CULTURAL PRACTICES IN RELATION TO 
QUALITY AND SEEDLESSNESS 
The Nakorn Chaisri seedless pummelo, Kao Pan, is only pro- 
duced in its seedless form, with its excellent flavor and juiciness, 
in a restricted region on Tachin River about the section, or Tom 
Bol, of Ban Mai. If taken to regions other than Nakorn Chaisri 
it is said to deteriorate greatly, in that the fruits contain many 
seeds and the quality of the juice sacs is not so good. This 
deterioration is often attributed to lack of salt in the soil. As 
has been pointed out, the tidewaters of Tachin River in Na- 
korn Chaisri are salty for the greater part of the year, from 
January to June or July, depending upon the rains. Growers 
say that if the season of salty water is long, the fruits of the 
following year are better in flavor and have less seeds. They 
report that there is no danger, in the pummelo sections, of a 
too salty condition of the soil through this natural process of 
salting by means of the tidewater. In other regions there have 
been attempts to maintain the Nakorn Chaisri standard of per- 
fection by the artificial application of coarse sea salt. 
Some orchardists claimed that the trees grown away from 
Nakorn Chaisri had fruit without seeds; others stated that many 
seeds developed. It was impossible for us to ascertain defi- 
12 Determinations by Harold Morrison, of the United States Bureau 
of Entomology, Washington, D. C. 
