DIAMOXD-BACK MOTH. ijg 



is entirely stripped by the caterpillars, and they are evidently fond of 

 i^rown Mustard. 



(7). " Starlings have frequented." — W. H. W. 

 Simderlandidck, Driffield, Yorks., July 26th. From Mr. Frederick 

 ±teynard with very numerous specimens of caterpillars of Diamond- 

 back Moths, of different sizes up to nearly full growth, and request for 

 particulars.-- About the accompanying specimens of caterpillars I am 

 sending you, they have been troubling me for the last fortnight ; they 

 attack the earlier-sown Swede-turnips only ; they are now considerably 

 ess m numbers than they were a week ago. I have invariably found 

 them on the under side of the leaf." 



Replies to inquiries in circular (see p. 110), August 20th :— 

 (1). " Damage slight ; at present impossible to estimate. 

 (2j. " Damage was done and caterpillars had disappeared before it 

 wasj^nown what they were ; hence no measures were taken to destroy 



(3). " Eain appeared to stop the ravages when accompanied by wind. 



(4). -Clay-loam; previous crop Oats, deep ploughed in autumn 

 sHortly after harvest, cross-ploughed end of January, and twice after- 

 wards ; 26 per cent, superphosphate only used ; no salt or farmyard 



{5j. " Weather favourable ; no particular weed noticed. 



(6). " Have never noticed this caterpillar before. 



(7). " Cannot say, but should judge that Sparrows, Eooks, and Wood 

 -rigeons are no use." — F. E. 



Appleby [North Lincolnshire), (Post-town) Doncaster, July 20th 

 Correspondent writing under the name of - N. Lines." (name not 

 given by request) forwarded specimens of caterpillars of Diamond- 

 back Moth, and of injured leaves. One of the grubs, just over half an 

 inch long, was lying quiet in slight web, as if about to spin up and 

 ciiange to chrysalis. My correspondent noted :-" My Swedes and 

 many more in this district, are giving way fi-om multitudes of cater- 

 pillars on the under side of the leaf." 



Replies to inquiries in circular (see p. 110), August 12th;— 

 (1). " Swedes damaged greatly here ; probable loss of 50 per cent 

 ot i-esultnig food ; 5 per cent, of Swede area only totally destroyed • 

 white-fleshed varieties not much damaged here (oohte), but much so 

 on the wolds (chalk). 



(2). "In my case nitrate of soda has given vigour to the plant, 

 thus doing good. Friends report boughs on scufiflers advanta^^eous. 



(3). "Heavy rains (1-73 in. and 2 in.) have done immense good, 

 and caterpillars now gone. 



(4). "Oolite and on clay ; worse on clay. Autumn cultivated, and 

 ploughed 6 in. ; 1 cwt. boue meal, 3 cwt. min. phos. 



t2 



