. has given the name of De 
into my fini well as of tii specimens of disenso cane, onfor tn tely — 
far from satisfactor y, which have been tran ted to us fro B. y 
. Colony, have led to "thé following porate whiel lave already been | d 
Bron ed to the Queensl and: Gover nment :— : 
Eo ES 
RN 
a4nnpears at th with one which ` 5 + i 
has been noticed in the Malayan rr ic ad in rack [Journal | 
Royal Hor ‘tienltural Society, New oe vol. iL, pp. exxxi-cxxxii], 
as * ic which i tende in à aber till the whole leaf withers, aud. 
ultimately dies. When the leaf is stripped off, there is usually found. 
inside the sheath and upon the stem a patch of dark brown or reddis 
inerustation. : 
Professor Liversedge of the University of Sydney has. studied the 
disease, and attributes it to defective conditions of cultiv 
considers that the marks on the leaves, and the red irit on the 
stem, are caused by a fungus of the family ZZEcidiacei, but that its 
attacks are the effect and eause of th i 
t ; 
vede also noted the presence of acari, which he believed fed on. 
je S 
E Bandits ina paper presented to the Queensland Parkan 
in m» 6, distinguished between the disease as affecting the leaf and 
the stem. He found that the red spots on the leaves eventually pro- 
duced a fungus with black spores, and he attributed the spots to its 
attacks. The red incrustation on the stem he also believed to be fugat 
but was unable to throw any aa light upon its cause ; he d — 
mites Mess at the injured spot 
In a subsequent paper, ‘Dr. Bancroft (Sugar-eane, Sipen ber - 
187 7, di 476—480,) has shown, I think, almost conclusively that the ied 
inerustation is the result of the attacks of an acarus dona infests. the — 
ele Mr ow oome ; 
ihogsiivos that the red re PE th was in no way. due to a f ungus, P 
and were disposed to attribute it-to the attacks of a coccus. 
6. Specimens were then submitted to Mr. McLachlan, F.R.S., w 
whom eu were sent td M. Signoret, the best living authority. on the 
Coccide, He arrived at the opinion that the red inerus station was not 
the work of a pce a view in which Mr. E Mitre 
a further examination of some of the specimens, Mr. Lachlan aii 
in a letter Sea) ca 14th, 1877) that he had found “ «miriade of what 
* may be collapsed a : 
7. This ki iei of, and so far confirmatory of, the observ 
tions made by Dr. d 1 grs Pec pti that it is probable that. 
the true cause of the so-called “rust” has now been detected. The 
utei being postion joi ie ! be 
municated from one crop to another. Dr. Bancro 
the j joints in milk of lime a the acarus, and probably à mixtu 
of two to four ounces of | carbolic acid to a gallon of ` 
effective. CU E 
| 8. The black spoed fungus eventually produced. by the red 
-the Moe is regarded by Mr. eren as a new species, to 
1 sac s i; he does 
wu: ied in the dio cre 
