84 
CORN. 
V 
This border stopped the fine soil swept down the slope, so that the 
Carrots were thoroughly earthed up to the level of the top of the 
border with good soil fitted into every cranny. The result was 
satisfactory in the highest degree. The Carrot-foliage was luxuriant, 
and in autumn we have housed a crop of well-grown delicate roots 
without a taint of “rust.” One cannot command the misfortune of a 
sweeping flood to help one’s Carrots, but the unusual occurrence 
showed the success of the principle of thorough protection. 
It does not appear desirable to enter on the methods of prevention 
at full length here, as I have previously given them elsewhere,* but 
the principle of prevention may be shortly described as sowing on land 
free of infestation, and so well prepared beforehand that the roots 
will have a good luxuriant growth; using all means at thinning-time 
to keep the fly from being able to get at the roots, amongst which 
watering with applications deterrent to the fly and stimulating to the 
Carrots are desirable, and, if it could be managed, earthing up the 
Carrots ; also being careful to remove all drawn plants or broken 
pieces away from the beds at thinning-time, as these specially attract 
the fly. 
CORN. 
Frit Fly. Oscinis frit, L. {? Oscinis vastator, Curtis). 
Perfect fly, nat. size and magnified; and attacked plant, with maggot inside, f 
* See my ‘ Report on Injurious Insects for 1880,’ and also ‘ Manual of In¬ 
jurious Insects,’ published by Simpkin, Marshall & Co., Stationers’ Hall Court, 
London, E.C. 
+ The Oscinis vastator of Curtis bears such a strong resemblance to the Oscinis 
frit, which is the subject of the present paper—even if it is not absolutely the same 
that I have used Curtis’s figure to give the appearance of the insect and its 
method of injury. 
