366 



Insect Pests. 



we know little of its workings. As far as we can see, trapping 

 seems the most successful method of prevention. This may be done 

 as for the Codling Moth, as from what we see recorded from Headley, 

 the maggots pupate under " shreds " and other cover, and would be 

 doubtless caught in " sack bands." 



Kollar (4) p. 233 refers to the plums ripening prematurely, and 

 says : " We should shake the tree to make that plum fall and im- 

 mediately convey it out of the garden." On a small scale we can 

 do this, but it must be done often and thoroughly. 



REFERENCES. 

 Economic 



Zoology for the year ending 



(1) Theobald, F. V. Report on 



April 1st, 1907, p. 67 (1907). 



(2) Tlii'obalcl, F. V. Notes on Insect Pests in 1894, p. 8 (1895). 



(3) Stainton, H. T. 'A Manual of British Butterflies and Moths,' vol. II., 



p. 253 (1859). 

 <4) Kollar, V. 'A Treatise on Insects, etc.' p. 232 (Eng. Trans.) (1840). 



PLUM TORTRIX. 



(Pentkina prnniana. Hb.) 



This is the most abundant Tortrix I have found on plums, and it 

 frequently does as much harm as the Winter Moth. 



The moth has the front wings with blackish- brown bases, then 



follow pale areas and a 

 white spot on the outer 

 edge on the fold, the apex 

 white, clouded with grey 

 posteriorly, hind margin 

 dark grey, and three or 

 four dark grey spots near 

 the middle of the central 

 band. 



Hind wings brownish- 

 grey. Wing expanse about 

 inch. It appears in 



[Horace Kniijht. 



;FIG. 240. Penthina prui 



June and July and readily 

 flies from the trees when they are shaken. 



The caterpillar feeds also on apple, cherry and nut, and on the 

 sloe and bullace ; it is found in May and pupates as the other species 

 referred to on p. 78. 



