BUSHBERG CATALOGUE. 
Phylloxera. 
ge 
VEegs' 
n ran} 
Fig. 73. 
TYPE RaDICICOLA: a, shows a healthy root; 5, 
which the lice are working, on ene fe knots 
and swellings caused by their pun ctures aroot that 
on lea rted by them, he a the rootlets 
need to roti An ay; d, d, d, show how the lice 
nie inant o on the larger roots: é, female e pupa, dorsal 
view; g, winged female, dorsal view. 
The editors of this Catalogue could not help, how- 
ever, to doubt the theory o a aoa eye hie. 
after so many years of 
the Phylloxera, and peso Shiegehs us and healthy growth 
in some infested localities in France, co: 
this assumption And now most of those win 
gave special attention re this question, and have had 
he opportunity to test = both here sare in Europe, 
fe 
es completely resist the Phylloxera, and can succeed 
n spite of the insect, prov aac placed in loca- 
ions suitable ‘os and climat 
We see gu. * 
= tive American vines against the Phylloxere, «remark: 
‘ able veri cs oes £2 
A —— expressed, as “rm sUR- 
: os nh 
= 
2 — and our native vines are such as 
| insects Ne fail to settle where their i issue coul 
has not been accustomed tothe disease—there being, 
doubtless, a parallel between this case and the well- 
atal when first 
introduced among hitherto uncontaminated peoples. 
belong to. its own class, and which in this country 
help to keepit within bounds, are lackin 
European predaceous species will prey upon and check 
it there to the same extent. The Phylloxera will, also, 
countries where the mildness -. shortness of the win- 
er allow 2 Frain in i 
erations. 
of culture ae no insignificant bearing on the qu 
tlon in hand. Though Phylloxera, in both types, is 
found On our wild vines, it is very doubtful if such 
a state of nature are ever killed by it. 
depth of — which — — less susceptible to 
injury from an under Our own met. 
of growirg = baie on trellis approaches more nearly 
these natural conditions than that employed in the _ 
ravaged French districts, where the vines are grown 
und, or are an GE En 
A 
females “dulig from the coon String late summer 
and fall, he ad ‘The winged female Phylloxera is 
wafted about, and will lay hereces 6 or,in other words, 
deliver herself of her progeny, wherever she happens 
to settle. If this be upon the gra d 
good —the ied live and Lapin te; if upo: 
plants, they perish. We 
species annually ret ng i itself away to 
less extent, just as in the vegetable 
0 peris hus 
thickly planted wine districts of France few winged 
vive, while ally 
| perish in the | large tracts of other vegetation delaiccabe’ 
ards.’’ 
ing between our viney;: 
th ot: 
3790 ams 
: appropriated for the purpose by the French Govern- 
a ce umerable plans have been proposed and 
Siberia sedemmssties wes no p romney has yet ft beer discor- 
ered which gi 
all conditions of soil.* Submersion is an efficacious 
remedy, but to be effective the field must be covered 
with water one foot deep during eight weeks, Novem- 
berand December t iod 
a less complete submersion is useless, , and on most 
ee Sees ee This was first discovered by 
* La lutte contre le phyllorera. 
S| shires e gees 
ee one on this 
