42 REPORT ON INJURIOUS INSECTS FOR 1904. 



remains there, then the calyx lobes close, still leaving the poison 

 ready for the young larva when it makes its way here, as 

 previously described, a week or so later. 



Two applications are usually enough, unless rain intervenes 

 and washes the poison away, one just when the blossoms have 

 fallen and again in a week. For this purpose a coarse spray has 

 been found more effective than a fine one. 



Banding the trees with old sacks, strips of felt or paper, hay 

 ropes, etc., is undoubtedly useful in reducing the numbers of 

 succeeding generations. The rough bark must first be scraped 

 away, and then the band applied early in the summer. They 

 should be f requently examined and the larvae found in the bands 

 destroyed. 



" Windfalls " should not be allowed to remain on the ground, 

 if unsaleable they should be utilised as pig-food or burnt. 



All rubbish, stones, dead wood, old boards, etc., should be 

 removed from beneath or near the trees. 



Barrels in which apples have come from abroad should be 

 burnt, as they are a source of constant infection. In the angles 

 and cracks larvae or pupae are to be found, from which moths will 

 later emerge. 



THE LILAC LEAF MINER. 



Gracilaria syringella, Fabr. 



In Worcestershire, Warwickshire, Northamptonshire and 

 Staffordshire, various correspondents have written for informa- 

 tion about this destructive moth, and the means of preventing the 

 destruction of Lilac trees by the larvae. 



In 1904 the larvae were first noticed towards the end of 

 May, the pupae on June 28th, from which the moths emerged 

 on July 3rd and 4th. 



At the end of June two or three trees were entirely stripped 

 of their leaves, all of which were burnt, but the new leaves were 

 full of larvae again on August 28th. 



As yet, I do not know of any effective remedy for this pest. 



THE PEAR MIDGE 



Diplosis pyrivora, Riley. 



During the past ten or twelve years the Pear Midge has 

 slowly but surely spread itself throughout the pear orchards of this 

 country, and each succeeding year marks a distinct increase in its 

 numbers, and over a still wider area. It is very certain that there 

 never was a time when it was more plentiful in the South-Western 

 and Midland Counties than to-day, and seeing the serious loss 

 this insect has already caused, and the still more serious loss 

 which must accompany its further increase, I have been asked by 

 certain growers if I would publish a short account of its life- 

 history, together with the known and tried methods of dealing 

 with this pest. 



