164 



Insect Pests. 



and the result was that the Psylla were practically exterminated, as 

 they were in iny own garden two years previously ; and I venture 

 to think, now it has been found successful by a large grower, that 

 it can be made so by others, and that with it and the lime, salt and 

 waterglass treatment the damage done liy this serious pest may be 

 greatly reduced. 



Natural Enemies. 



So far no insect parasites have been recorded from this pest. 



A small red acarus was observed once feeding on the eggs, but 



has not been noticed since. 



Schmidberger (1) mentions two mites, one deep red, the other 



a dirty yellow, which pursued and sucked the young of this insect 



and cleared them off a pot tree under observation. He also found 



the light green pupa of one of the garden bugs pursuing the young 



suckers and piercing them with their beaks. 



The Blue Tit and the Long-tailed Tit take a certain number, 



and I have knov/n shoots quite cleared of the eggs by a family of 



the latter birds. 



however, which do any appreciable 

 good. Schmidberger (1) describes the 

 adults as " subject to a kind of disease 

 which appears to deprive them of the 

 power of eating, and in this case 

 the leaves on which they are found 

 are not in the slightest degree in- 

 jured. When thus affected, the head 

 and thorax of the insect are snow white 

 nnd tlieir abdomens are ringed with 

 black." 



This fungus was probably Unto- 

 iiiophthora sphcerosperma of Fresenius 

 (9), which is common on the Leaf 

 Hoppers Typhlociiha spp. This fungoid 

 parasite is white at times and at others 

 pea green. 



The ova (Fig. 137) of a I'socid are 



are often sent with tliose of the Apple Sucker and with Leaf Hoppers. 



It is possible that these insects prey upon the young suckers. 



No enemies are known. 



[/''. Edeiiden. 

 FIG. 137.— EGGS OF A Psocid SV ? 



Frequently found on fruit trees, 

 ((ireatly enhu'-'ed.) 



