44 Second Report on Economic Zoology. 
up this pernicious weed ; although the land looks as if cut up by 
shell-fire, no damage is done to the gooseberry or other bush fruit, 
whilst it is speedily cleared of the vegetal encumbrances, not to 
mention the innumerable insect pests, as Gooseberry Sawfly and the 
others previously mentioned. 
Pear Midge. 
(Diplosis pyrivora. Eiley.) 
A communication was received in February from Mr. N. D. 
Berry, of Scarbutts Manor, Bough ton, near Faversliam, as follows : — 
“ Our Hazel Pears were last year very badly attached by the 
hear Midge. Unfortunately, being busy, an application of Kainit 
at the time was overlooked. Can I check them this year before the 
damage is done, or must I now wait until the diseased pears are 
ready to fall and then destroy them ? ” 
The following reply was sent : — 
“ Unfortunately we do not know any certain means of checking 
the Pear Midge ( Diplosis pyrivora). Kainit does good according to 
one report ; another says no use. Personally I have found it of great 
benefit if applied at the right time. 
“ Now (February) you are too late to use it. You might try a 
heavy dressing of soot put on about the second week in June. 
Previous to this the ground under the trees should be heavily rolled, 
which will prevent many of the delicate flies escaping from the soil. 
“ I tried last year heavy waterings with paraffin emulsion around 
the known affected trees, but this only met with partial success owing 
to the smell of the oil soon going. I think soot most likely to do 
good put on just before the flies escape.” 
The pear crop having been almost nil in this country during the 
past season, this pest must surely be checked. 
Woolly Aphis. 
{Schizoneura laniyercc, Haus.) 
Some apple twigs sent by Mrs. Durham, of Ellerdale Eoad, 
Fitzjohn Avenue, N.W., were attacked by the Woolly Aphis, the so- 
called American Blight, Schizoneura laniyerct. The following reply 
was sent : “ It is a serious pest in both old and young apple trees, 
and should be destroyed as soon as detected in an orchard. This 
may be done by spraying early in the year (February) with caustic 
