56 



RATIONAL FRUIT CULTURE. 



THE IDENTIFICATION OF INSECTS. 



To assist in the identification of the different insects, they 

 are arranged according to the part of the tree which they 

 generally attack. There are others, but those given are the 

 most likely to be troublesome. In the case of naoths, it is 

 not the perfect insect (the moth) that does the damage, but 

 the larva (the caterpillar or maggot). The kind of tree on 

 which each pest is commonly found is stated. 



INSECTS THAT SUCK THE SAP. 



Aphides, or Plant Lice. — Apple, Plimi and Cherry. Mostly 



Fig. li.— Aphlt (abovo), and n«d Spldar (below), both highly mtgnin«d. 



wingless, green, or nearly black, they collect on the lower 

 side of the leaves, cause thoni to curl and lose their colour, 

 secrete a sticky fluid, which eventually turns black, migrate 



