174 
17. ECONOMICAL TREATMENT. 

= Tf one cannot as yet dogmatise about the causes which have led to 
E his siis still less can one suggest measures which of necessity 
en a proper ORE of mecs causes, end, as a rule, on an 
S 2 intimate refe intance cane-grow 
—..— When once its sedes is thoro ghi. understood ee are plenty of 
. persons in the West Indies quite competent to apply remedies of their 
_ own devising without outside assistance ; it will therefore be sufficient to 
suggest cin M of remedies should and should not be looked to as 
. being of serv 
-. The Wotioimle treatment of an insect pest is of two kinds, preventive 
$ and ii 
eventive treatment is that designed to check the future spread of 
the insect, to a wider area, or to stop attack on growing plants as yet 
ntouched, even at the expense of those aan infested, as for example, 
i nd burning of atta 













t by killing the insects on S 
















y it toy is are lost, and shiek they 
may be per aa made useful if rth a and crushed at once, there 
. is no way of saving them as growing 
_ The former is therefore the only Pectin to be discussed. 
18. INCREASE OF THE CONSTITUTIONAL VIGOUR OF TBE CANES. | 
‘This may probably be the most important ‘pes oe measure, if it be 
that th Bourbon canes are constitutionally w 
f . G. W. Sh has pointed out (20) the immuvity of the -— 
parent, packet Sie Caledon nia Queen canes, a and Mr. Hart that ; 
seedling canes (15). | x 
"The atter ncn beg securing constitutional acon by the: selee- —— 
tion of a suitable variet raised from seed [or otherwis se]. The 
Sbjedkions eivind to this, that seedling canes do not yield a sufficient. 
. per-centage of "retium must be left to experts to compare with the toss 
_oecasioned by the borers, 
19. MEASURES OF CULTIVATION. 
The unanimous opinion is es P cultivation of the attacked canes, - 
fo on SABE estates, as sn tra estate in Trinidad, is is 
> 





ae : 
E would be no good a i t the borer, and the idea dust manuring 
s ewe ight fen to excessive employment. of mä: It has been 
case of tests that. dig Nie uring with n Vogen di ferti- 
owth, stalk whieh is s readily beaten 
emnes as a thinner rin rind thar 






