
| 175 : 


varieties not attacked, and anything which pushed them to excessive 
growth might make the em more susceptible by increasing this peculiarity. 
Perhaps 1 this may ke why on some of the best managed estates 
the attack has been worst, ae excessive vegetative vigour sometimes. 
tends to “ cohstitütional weaknes 
20. THE DESTRUCTION OF OTHER CANE Pests. 
on their presence. The t treatment of Chilo ladMarais the sugar-cane 
moth, has been so often oT ey E is not necessary to go into it. 
e most recent account is tha A. Cockerell (25), 
published with a “bibliography in ee ‘Bulletin of the Bot tanical . 
Department of Jam : 
‘The treatment of the weevil, Sphenophorus sacchari is less dei 
known; a useful account of this and other cane pests was given by 
Miss Ormerod at the d Sadie koe Society of Londo ; and has . 







21. Tux DESTRUCTION or BROOD MATERIAL. 
Measures for this have been most generally recommended - 
adopted. pe 
They 6b consist in— : 
T Burning trashings, megass, rotting vw diseased canes and allo 
p With | regard to the two former, I have no evidence yet that the 
_ breeds in trashings, that is, in the cut-off leaves. It does s occupy m 
in abundance but only just when it is moist, that is, when it will n 
r 

2 profes: Riley, o of the U.S. Department of. uM writes 
eat Sommittee (26) : * I think you are perfectly 
ie the TnGRéasb of the Xyleborus. to the discontinuance of. the bu 
. f ing of the bagasse (as we call it in this country), and it it seems proba 
_ that the resumption of this custom will greatly decrease the r 
. * of these beetles. I can hardly *onceive it as possible that the 
.. * will oviposit by ideals in healthy ca cane UM it [has a me 
. * dead or dying vegetatio nd." 
The Committee Vessel vin say that dry megass contains n no shi 
borers, which I have myself observed to be t the eret and it wil 
sade orth while exami bili tense’ to see if it really remains moist lo 
* ough to breed beetles for more than a short time i ME Hone We 
= will also be well to consider whether in countries like Jumaica and 
sugar-growing districts of South America where the beoe e 
without attacking the canes, the — is treated i in 1 such a wey 
to harbour t 










a 2. Cutting out and deri: canes. diseased, or attacked CN th 
jT Mn or the ga bore 

