1907.] 



Destruction of Slugs and Snails. 



43 



Harper Adams Agricultural College* Twenty-lour apple lnr> 

 were planted in January, 1905, and the growth in 1905 and 

 1906 has been compared. The grass land in which the trees 

 were planted was manured regularly with farmyard and 

 artificial manure, the grass mown and removed, while special 

 artificial manures were used in the cultivated portion for each 

 crop, in addition to farmyard manure, thus obtaining equal 

 conditions as to manure for the trees on both plots. The 

 trees were measured at a distano "I j ! It. from the ground, 

 with the following results : — 



Variety of Apple. 



Average Diameter in Inches. 



( irass. 



Cultivated ( ; round. 



1905. 



I906. 



1905. 



I906. 



Bismatrk ... 

 Bramley's seedling 

 Co.x's orange pippin 



1-03 



0-S2 



I -05 

 o8l 



o'S6 



1-31 1-62 



I"20 | I*50 

 I'll I -40 



These results show that while the stems of trees in grass 

 have increased only 0*03 in., in diameter, those in cultivated 

 ground have increased 0*3 in., the proportion in favour of 

 cultivated land being 10 to E. 



A question of considerable importance to farmers and 

 gardeners is how best to guard against the attacks of slugs and 

 snails. This subject was dealt with in 

 Destruction of Slugs the Board's Journal for January and 

 and Snails. bebruarv, 1003 (Leallet No. 132), but 



the following further information] taken 

 from The A»rieiiltnrul Xeics, (Barbados, February <)th, 1907) 

 may be found useful : 



" The following, taken from Circular 53 of the Comision tie 

 Parasitologia Agricola, Mexico, K)o(>, indicates some of the 

 methods that have been found useful in dealing with snails and 

 slugs which are at times a serious pesl in that country : — 



"The collection ol snails bv hand has been tried and found 

 successful, The best times for the practice (A this method art 



at the beginning and the end of the rainy season. 



* Joint Report on Field Experiments for 1906. 



