390 Report of the Consulting Untomologist, 
written reply as to points of orchard insect prevention was also 
needed, the correspondence has been unusually large. 
The crop attacks reported have been of the common kinds, as 
of daddy-long-legs grubs, wheat-bulb -maggot, turnip-gall-maggot, 
wireworms, clover-weevil-maggot, and the like, but rarely to a 
serious extent, excepting with regard to wheat-bulb-maggot and 
clover stem sickness, which may need a word. 
This clover attack may be known (without any microscopic 
examination for the eel-worms which give rise to it) by the 
deformed growth of the infested plants. Many of the shoots will 
be found to be short, swollen, and with their side shoots placed 
almost close together as large swollen buds, or deformed in many 
other ways, and often decaying away below at ground level. The 
best remedy for this attack is a dressing of sulphate of potash 
Fig. 1. — Wlaeat-bulb fly (/lylemuia coarctata) magnified, and lines showing nat. size ; maggots and 
chrysalids, nat. size and mag.; moutli apparatus, and extremity of tail, with tubercles, mag.; 
infested plant. 
3 cwt., with sulphate of ammonia 1 cwt., per acre. This has been 
found (especially in experiments at Rothamsted) to answer excel- 
lently both in stopping attack and in giving a vigorous growth, tke 
good eflfects continuing to the second ci-op. 
Where experimental clover plots have been destroyed by " stem 
sickness," clover succeeding on the same ground will be extremely 
likely to be attacked, unless the ground is properly trenched. 
Common digging, or even double digging, is not to be trusted to, 
as thus the surface soil infested by eel-worms, and pieces of infested 
shoot, are left near the surface to communicate the attack to the 
next crop. 
Wheat-bulb-maggot is now appearing to a serious extent in 
various places, and it is very much to be wished tliat some experi- 
ments could be undertaken as to its prevention, for it is the 
cause of much loss almost yearly. The little yellowish maggot feeds 
