ANIMALS INJURIOUS TO FRUIT TREES. 2g 



When full-fed the larva eats its way out of the tunnel and crawls 

 upon the leaf, and after four to six hours commences to form a white 

 silky cocoon, usually on the lower side of the leaf. The cocoon is left 

 open at each end. The pupal stage averages about twelve days, but 

 is variable. Three or four broods occur in a year. During the winter 

 months the moths hybernate in crevices, amongst rubbish, etc., and 

 in wooden sheds, etc. 



PREVENTIVE AND REMEDIAL MEASURES. 



As will be gathered from the life-history, this is a difficult pest 

 to attack. Hand-picking and burning the attacked leaves, whilst 

 successful, is a somewhat drastic measure, and practicable where 

 only one or two trees are attacked. 



Early spraying with paraftin emulsion, with plenty of soap in, will 

 deter the moths from depositing their eggs on the leaves. 



Where espaliers are grown, dead leaves are often left amongst 

 the branches, and thus afford winter quarters ; these should be removed 

 and burnt. 



THE PEAR MIDGE. 



Diplosis pyrivora, Riley. 



Very few cases have been reported of this pest during 1910. 

 Since I wrote of it in 1904, l it has considerably decreased in the Midland 

 Counties. I am now quite convinced that it can easily be held in 

 check by the measures I there recommended, viz., turning over the 



i 



FIG. 12. THE PEAK MIDGE. 

 i and 2. Distorted pears containing larvae. 3. Section showing larvae in situ. 



Rpt. on Inj. Insects, 1905, p. 49. 



