Остовев 25, 1919. ] 
As remedial measures аге impossible in this in- 
stance a clean- germ policy is being vigorously 
ma; 
advocated, and u cientific advice this 
become the rule 2 “all Ung bber estates i 
the East. In this country Salmon, who is under- 
king a detailed study of the hop mildew 
(Sphaerotheca humili), has obtained seedlings 
which he states “ ШЫ те m immunity aft 
four yea ci trial i a hop garden under normal 
tonditions of йн cine апат аа - s the 
lepredation of mildew only know 
mould, causes gre БОШ m growers, 
d wou "es os & ер 
гісіз In the 
eld of ЖОП in the wane. is realis ed as prac- 
tically w limit; one in which 
dvance must be made b development of 
pure science, and by men with a broad outlook 
and TO 
and fully in Tier Y ith the practical as well as 
the scientific si 
А strain of flax at the J 
Institution. This, = зыл able of 
lished on pure 
simple lia s 
"2 ether self. eales are c fertile 
"pollen ol any other variety. So far, 
‘the е E show pe is 
roduc x iy о Ae simul- 
taneously with the US шеп its is s intended to 
pollin t least of Plums and 
pilos 
of itec l education and research by the Royal 
Horticultural Society at Wisley. Thi main- 
tained by liberal fum and by me T M 
узы [реа laboratories al 
у ans 
and extensiv 
offers unique facilities for ieee 
“Оган ot great value as affecting the cs 
of British horticulture. Та asus d with the 
Wi private firms are also se tting up 
oratores of their own and em 
о individual initiative а 
18 recognised as s fundamentally im important in the 
advancement of sci 
n schemes of nid cultivatio: ably 
advocated in gp to food an жй „ж is 
well to bea ind that it may be LR ible 
in some ° instances ces to go beyon ned whet m essary 
to achieve the object im view. Russel is of 
У а that the more ү Ме the cropping 
© greater the opportunity for the various pests 
THE GARDENERS’ 
CHRONICLE. 
211 
to live Further, most pests e their 
parasites, апд v olesale sterilisation may help 
th t by гнанага the parasites. Imms has 
recently noted two case; her s is said to 
i d. 
of this character in the case of the Moth Borer 
attacking sugar-canes in the West Indies. For 
probably something like two hundred years the 
moth ‘borer had been regarded as the most de 
ctive enemy of the sugar-cane. Its lif 
history nknown until Lefroy, then attached 
to th partment of Agriculture, di 
covered eggs which wer eposited in a 
g Рза авт" eg us back E leav: f tthe 
sugar- y clu ere con 
r isters wW incor 
spicuous that they E entirely карай notice. 
boys to cut off 
pace метла of Lefroy the leaves with the 
Fic. 96.—FRUITS AND ar ОЕ DIPTERONIA 
(See p. 212.) 
egg clusters were not burned but spread out in 
the shade to enable the parasites to hatch out, 
with the result that in the later sta: ї the 
crop nearly all the moth-borer eggs were 
parasitised, and loss in canes in that and 
the pin. тор was gely reduced by 
nati mea 
progress made in the elucidation of pro- 
bitis in tropical plant рано ology жет р 
т the necessity for well 
rienced mycologists and entomologists, but 
lso for the correlation and combin 
ine 
Bu 
by s it wil v welcome the estab 
* Address, 3316: 
ment y ge proposed I 
perial Bureau of My- 
on its чад. з on similar lines. 
cology, carry 
In ig brief review I have endeavoured, how- 
ver imperfectly, to place on record some of the 
activities that h zen place in the domain 
of Botany in r ye It has only been 
possible to select a few of the most striking in- 
idents where progress has been made. s 
has been done in the hope of arousing wider 
interest in work of prime importa: s affect- 
ing the interests of the home country and the 
impire. "Botany. in its widest affects 
largely the welfare of the human race it is 
impossible ү hope our efforts. Advan 
iphone ow, but the creative im 
sience сапт е fail to bring in a large um аң 
nie res saute. This may be е sible by encouragin, 
individual efforts, by organisi ng -— co- 
© 
5 
ir 
$E 
peration and in associating with us who 
re prac vier grappling with difficulties that 
seem alm possible Жегу e. I have 
attemp iei ue tm in what vast fields of enter- 
prise ея science has gren уурар 
signal service. regards the future, if w 
SINENSIS, 
enlist the host е imbued with the true 
-— E d essiv 
ertainly one of the outstanding features that. 
Fea ap from a record of botan ui. 
st decade or two is the promin 
í— Ач se. Im. 
11 а 1 
established and maintained by. Government and 
pri M е Plant-breeding is now in the fore- 
more easily 
өрә in that direction than in any other. 
