IDENTIFICATION OF INSECTS INJURIOUS TO CROPS 85 



Leaves: 



(a) Larvae, 20-Iegged, dull white when young, then greenish with black spots, 



finally greenish yellow, eating holes in the leaves in early spring. — Imported 



Currant Worm (Pteronus ribesii), p. 346. 

 {b) Leaves curled, blistered, and with a reddish appearance on upper surface, 



caused by yellowish plant-lice — Currant Plant-louse {Myzus ribis), p. 145. 

 (c) Leaves turning brown and dying. — Four Lined Leaf-hug {Poecilocapsus 



Uneatus), p. 163^ 

 {d) Measuring worm feeding on leaves of gooseberry and black currant. — 



Currant S pan-worm {Cymatophora ribearia), p. 206. 

 (e) White spots on leaves, produced by a pale green sucking insect occurring 



on the under surface. — Currant Leaf Hopper {Empoasca), p. 155. 

 (/) Green plant-lice. — Green Gooseberry Aphis {Aphis sanborni). 



Fruit: 



(a) Greyish caterpillar boring into young fruit and eating out its contents. — 

 Gooseberry Fruit Worm {Zophodia grossularia). 



(b) Purplish spots surrounding small circular scales. — San Jose Scale {Aspidiotus 

 perniciosus) y p. 126. 



(c) Yellow oval maggots eating the gooseberry. — Gooseberry Midge (Cecido- 

 myia grossularia) . 



(d) Small white maggot eating the currant and gooseberry, causing the fruit 

 to turn red and fall. — Currant Fruit-miner (Epochra canadensis), p. 265. 



XV. INSECTS INJURIOUS TO THE GRAPE 



(Consult Bull. 33i> N. Y. Ag. Exp. St. and Farmers' Bull. 70, U. S. Dep. Ag.) 



Roots: 



(a) Producing soft yellow irregular spherical galls on rootlets and larger roots, 

 causing death. — Grape Vine Phylloxera (Phylloxera vasfatrix), p. 148. 



(b) Large borer, cutting a tube through the root near the surface. — Broad- 

 necked Prionus (Priontis laticollis). 



(c) Grub eating the bark of both the large and small roots. — Grape Vine Fidia 

 (Fidia viticida), p. 311. 



Branches: 



{a) Young shoots suddenly break off or droop in spring; a small hole just above 

 the base of the shoot leading into a burrow. — Apple Twig Borer (Amphicerus 

 bicaudatus), p. 327. 



(b) Canes show roughened longitudinal rows of perforations in the bark. — 

 Tree Cricket ((Ecanthus nigricornis), p. 116. 



(c) Canes exhibiting white cottony masses attached to a reddish-brown scale. — 

 Cottony Scale {Pulvinaria vitis), p. 130. 



Leaves: 



{a) Leaves riddled with irregular holes about mid-summer by a little beetle. — 

 Grape V tne Fidia {Fidia viticida), p. 311. 



