FOES AND FRIENDS OF THE PLANT 



219 



eating the leaves, 

 spraying 



It could perhaps be checked by 



MITES 



These are very tiny creatures which have eight legs, 

 while the true insects have only six. 



Erinose. When the leaves of 

 your grapevines look very un- 

 even and seem to be covered 

 with little swellings, while the 

 under side gets woolly, your vines 

 are attacked by a small mite 

 which causes the disease called 

 erinose. It does not do much 

 damage, and the sulphuring 

 which the vines are given to 

 check the oi'dium or mildew 

 checks also the erinose. (Cali- 

 fornia Experiment Station, Bul- 

 letins 136 and 192.) 



Red spider. The tiny red 

 spider (figure 126) of citrus 

 and other fruit trees causes 

 the dropping of fruit (but 

 not the spotting), and also 

 injures the leaves. It feeds 

 on the leaf by sucking out the 

 the beak, thus causing white 

 lays its eggs on the leaves and 

 127). Ladybirds and other 



FIG. 126. Red spider of orange 

 in feeding position, show- 

 ing how it takes hold with 

 its four front, feet and pulls, 

 in order to force its beak 

 into the leaf or fruit. (En- 

 larged.) 



soft fluid parts through 

 spots on the leaf. It 



also on the fruit (figure 

 insects feed upon it, 



