DIAMOND-BACK MOTH, 117 



get to be about two-thirds of a full crop ; Turnips sown before and 

 after these fields, about 200 acres, have not been attacked, that is to 

 say, to any serious extent. 



(2). " All the remedy I made use of was to keep going all the 

 horse-hoes and scufflers I had all day long. One of my neighbours 

 tried trailing a sheep net across his Turnip field, and then sowing 

 lime, but I do not think his field has recovered more than mine. He 

 also had a net hanging on his large horse-hoe trailing on the plants 

 before the knives ; this acted well, but the pests were about over 

 when he tried this. 



(3). " The rains have done good in encouraging the growth of the 

 Turnips, as, had it been excessively dry, many more plants must 

 have died. 



(4). " Our land is light wold land on chalk, but the attack was just 

 as bad on both sand and clay. Two fields of mine were autumn culti- 

 vated, and one was simply ploughed in the usual way. Kauite was 

 used (but no salt otherwise) with bone manure. 



(6). " The weather was particularly dry. My land was cultivated 

 by steam power. No particular weed observed. 



(7). " Crows have been all over the fields since May. Many Star- 

 lings appeared when we had the caterpillars, and I noticed many small 

 birds in the Turnips, chiefly Linnets."— W. F. 



NoEFOLK.— A7w^s Lynn, July 21st. From Mr. Edw. A. Atmore.— 

 "Probably you have heard ere this of the ravages of the little moth, 

 Plutella cnicl/erarum (Zeller), in parts of Norfolk, especially in the 

 north and north-west parts of the county near the sea, this year among 

 Turnip crops. ... On the 18th of this month I was in fields of Tui° 

 nips near here, and observed these insects (P. cruciferarum) in large 

 numbers. They were present in all stages of devolopment— egg, larvae 

 of various growth, pup* and imagines, and already the crops have 

 suffered severely from the attack." 



On August 1st, Mr. Edw. Atmore further mentioned :—" The 

 recent, and I may say continued, heavy rams have apparently caused 

 a lull in the attack of this pest on the Turnip crops here, for in 

 many fields I have recently examined I could find very few larvae, 

 although a day or two previously they had been abundant there! 

 Moreover the rains appear to have much stimulated the growth of 

 the plants." 



Replies to inquiries in circular (see p. 110), August 11th :— 



(1). "Loss from this attack is without doubt very considerable, 



especially near this coast (north and north-west Norfolk), where both 



Cabbages and Turnips were attacked. At Thornham, I understand, 



the Cabbages were attacked first and nearly destroyed on one farm. I 



