86 
Mr. Turner : One pound arsenic, 4 pounds soda, 1 gallon 
water. A\> dilute about 20 times. 
Mr. Cooke: What does it cost to spray an acre? 
Mr. Turner: The cost of spraying is very little. On ordi- 
nary land it amounts to a dollar or $1.25 an acre, but on our 
land it would cost more than that, because our land is very 
rough. I am figuring more on the labor; the cost of material 
on the acre would not be over a half a dollar. That is very 
cheap cleaning. A question I think we should ask the Doctor is 
how long it can be kept up without injuring the soil. We use 
two or three pounds of soda ordinarily. 
Air. Cooke: Can a man spray an acre in a day? 
Mr. Turner: I think he can go over two acres in a day^ 
on ground of the roughest possible description. 
Mr. Anderson : Mr. Turner asks how long the spraying 
can be done without injuring the trees. We have done it for 
years. We have used this spray for two years. 
Mr. Lindsay : How many applications did you make in 
that two years? 
Mr. Anderson : We had one field that we sprayed about 
once in every three months. W^e gave it 8 or 10 sprayings, 
and the trees looked thoroughly healthy, and there is a mark- 
ed difference in the appearance of the soil. A\'hen the grass 
grows up on the soil, it improves considerably in appearance. 
Mr. Turner: It kills out some and does not kill out others. 
Mr, Anderson: It is the same thing; I have tried the iron 
sulphate, but it is not as effective as the arsenic. 
PAPER BY MR. C. J. AUSTIX. 
Owing to the absence of Mr. C. J. Austin of Xahiku, his 
paper on ''Pests That Have Been Found in Rubber Trees in 
Hawaii" was read by Mr. Lindsay. It was as follows: 
'AVhen the rubber industry was started in this Territory, it 
was stated by many people that the rubber tree had no pests, 
so that those that were investing their hard-earned capital 
in the rubber business need have no fear of later disastrous 
developments along that line. But, unfortunately, those who 
made such statements had not taken into consideration the 
great scheme of universal life which is hemmed in on all sides 
with enemies of one kind or another. 
''And when large numbers of individuals are gathered to- 
gether these enemies also seem to congregate and carry on 
a war for existence, and we find that the rubber plant is no ex- 
ception to the general rule. In the early stages of the rubber 
planting a small nocturnal marauder, the cut-worm, did con- 
siderable damage to the young plants as they were set out^ 
but as the plants grow rapidly and those who had the work in 
charge learned the habits of this nightly visitor it soon be- 
