674 



Apple Blossom Weevil. 



[dec, 



(b) If the soil is deep, 2 lb. of gas-lime per square yard may 

 be applied at the end of March, and a month later the soil 

 should be inverted by deep trenching. Any crop except 

 potatoes may be grown. 



(c) The affected land should be sprinkled with sulphur 

 (4 oz. per square yard) early in May, and, after having been 

 lightly forked in, any crop except potatoes may be sown or 

 planted. 



Whichever of these methods may be adopted it is necessary, 

 when potatoes are next planted in the garden, that the sets 

 should be dusted over with sulphur, and 2 to 4 oz. of sulphur 

 per square yard should be applied to the soil as planting 

 progresses. Before the potatoes are earthed up the surface 

 of the soil round the haulms should be sprinkled with sulphur. 



It is said that one or two varieties of potato do not suffer 

 from wart disease. The variety known as " Snowdrop " 

 appears to escape infection, and the varieties " Maincrop " 

 and " Conquest " have also been known to escape when other 

 sorts planted in the same garden have been attacked. These 

 varieties are, therefore, worthy of the attention of those whose 

 land has become infected ; but the preventive measures 

 indicated above should still be carefully followed. 



N.B. — Wart disease (Chrysophlyctis endobiotica) is scheduled 

 as a notifiable disease under the Destructive Insects and Pests 

 Acts, 1877-1907, and occupiers of land on which the disease 

 occurs must at once report it to the Secretary, Board of Agri- 

 culture and Fisheries, 4, Whitehall Place, London, S.W. In 

 reporting an outbreak, occupiers must state their names in 

 full and their postal address, and it is desirable that specimens 

 for identification should be sent to the Board. 



THE APPLE BLOSSOM WEEVIL. 

 Walter E. Collinge, M.Sc, F.L.S., F.E.S., 



Director of the Cooper Research Laboratory Berkhamsted. 



The Apple Blossom Weevil (Anthonomus pomorum, Linn.) 

 has long been recognised by fruit growers as a serious pest 

 wherever it occurs in any numbers. During the past five or 

 six years I have given considerable attention to the life history 

 and bionomics of this insect and many facts of importance to 



